Results 151 to 160 of about 779,072 (303)

A Vacuum‐Suction and Rotate End Effector for Robotic Apple Fruitlet Thinning: Comparative Development, Integrated Field Evaluation, and Preliminary Harvesting

Advanced Intelligent Systems, EarlyView.
Robotic apple thinning is constrained by a single field season confined to a few weeks each year. An efficient design process screens four detachment concepts off‐season using an artificial fruitlet structure, with field trials identifying vacuum suction and rotation as the most effective approach.
Rahul Jangali, Ben McGuinness, Hin Lim, Chi Kit Au, Henry Williams, Ans H. Qureshi, David Smith, Bruce A. MacDonald, Mike Duke, Abozar Nasirahmadi   +9 more
wiley   +1 more source

A Backdrivable Impedance‐Controlled Wrist for Safe and Measurable Canopy Interaction in Robotic Apple Harvesting

Advanced Intelligent Systems, EarlyView.
Dense apple canopies make contact unavoidable, and human pickers handle it by letting the wrist give. A compact backdrivable wrist brings the same compliance to a harvesting robot, deflecting on contact and estimating the interaction torque from motor current alone.
Ali Yasar, Dilshan Ranasinghe, Ayham Ahmed, Andrew, Edric Lay, Shao Liu, Chao Chen   +6 more
wiley   +1 more source

Lost in aggregation? On the importance of local food price data for food poverty estimates

American Journal of Agricultural Economics, EarlyView.
Abstract This paper explores within‐country variations in food price dynamics and food poverty estimates by employing local market price data and national consumer price index (CPI) data. Our results show that national CPI data may be useful for approximating national trends but they fail to detect and identify spatial variations in local trends, which
Stephan Dietrich, Valerio Giuffrida, Bruno Martorano, Georg Schmerzeck, Marco Tiberti   +4 more
wiley   +1 more source

Communicating seasonal forecasts to farmers in Kaffrine, Senegal for better agricultural management [PDF]

, 2013
Our project explaining seasonal forecasting to farmers in central Senegal built common ground between scientific forecasting and traditional knowledge.
Seck, M., Hansen, James, Ndiaye, Ousmane, Moussa, Abdoulaye S., Zougmoré, Robert B.   +4 more
core  

Climate change and perennial crop production: Evidence of yield impact and adaptation in California

American Journal of Agricultural Economics, EarlyView.
Abstract Perennial crops are economically important. They contribute to food security, providing essential nutrients that are often lacking in annual crops, and provide additional environmental benefits compared with annual crops. Despite their importance, empirical research on the impacts of climate change and adaptation on perennial crops remains ...
Yuanyuan Wen, Wei Zhang, Julian M. Alston   +2 more
wiley   +1 more source

Improving seasonal forecasts of air temperature using a genetic algorithm. [PDF]

Sci Rep, 2019
Ratnam JV, Dijkstra HA, Doi T, Morioka Y, Nonaka M, Behera SK.   +5 more
europepmc   +1 more source

Food insecurity and unemployment among immigrants in the United States

American Journal of Agricultural Economics, EarlyView.
Abstract Immigrants can be more vulnerable to economic downturns and, during periods of economic hardship, more likely to experience food insecurity compared to natives. This study examines the differential effect of the unemployment rate on the probability of being food insecure among diverse groups of immigrant households relative to natives in the ...
Siwen Zhou, Joshua Berning, Alessandro Bonanno, Jude Bayham   +3 more
wiley   +1 more source

Local Linear Forecasts Using Cubic Smoothing Splines [PDF]

We show how cubic smoothing splines fitted to univariate time series data can be used to obtain local linear forecasts. Our approach is based on a stochastic state space model which allows the use of a likelihood approach for estimating the smoothing ...
Baki Billah, Maxwell L. King, Ivet Pitrun, Rob J Hyndman   +3 more
core  

Improving access to new technologies: An experiment with Kenyan input sellers

American Journal of Agricultural Economics, EarlyView.
Abstract Agrodealers play a critical role in rural economies, selling essential inputs for agricultural production, stocking new products, and providing farmers with technical advice. However, uncertainty can discourage them from stocking newer, less familiar products, limiting the availability of innovative technologies and leading to market failures ...
Sarah W. Kariuki, Francisca N. Muteti, Annemie Maertens, Michael Ndegwa, Hope Michelson, Mercy Mbugua, Jason Donovan   +6 more
wiley   +1 more source

Firm turnover under asymmetric information: Tanzania's agro‐dealer sector

American Journal of Agricultural Economics, EarlyView.
Abstract We study firm turnover (i.e., entry and exit) and its consumer implications in a market characterized by asymmetric information. Using a three‐round census of agro‐dealers in Tanzania's Morogoro Region, we document annual firm entry and exit rates of 33% and 17%, respectively.
Alix Naugler, Hope Michelson, Sarah Janzen, Christopher Magomba   +3 more
wiley   +1 more source