17 research outputs found
Sugar Beet Plot Harvester
SUGAR beet companies, state experiment
stations, and the USDA Agricultural
Research Service use replicated
plots to evaluate sugar beet yields as
influenced by varieties, fertilizers,
water-management practices, etc. As a
result, many people need some type
of sugar-beet, plot-harvesting equipment.
Plots frequently are up to 50 ft
in length from which two to eight
rows may be harvested. Harvesting
sugar-beet plots by hand involves a
great deal of manual labor. Beets are
first undercut, then pulled and topped
by hand, piled in the center of the
plot, counted as they are placed in a
wire basket, and lifted by hand to a
scale for weighing. This method is
slow and expensive
The SAGEX Review on Scattering Amplitudes
This is an introduction to, and invitation to read, a series of review
articles on scattering amplitudes in gauge theory, gravity, and superstring
theory. Our aim is to provide an overview of the field, from basic aspects to a
selection of current (2022) research and developments.Comment: 15 pages, overview articl
Kirigami Makes a Soft Magnetic Sheet Crawl
Abstract Limbless crawling on land requires breaking symmetry of the friction with the ground and exploiting an actuation mechanism to generate propulsive forces. Here, kirigami cuts are introduced into a soft magnetic sheet that allow to achieve effective crawling of untethered soft robots upon application of a rotating magnetic field. Bidirectional locomotion is achieved under clockwise and counterclockwise rotating magnetic fields with distinct locomotion patterns and crawling speed in forward and backward propulsions. The crawling and deformation profiles of the robot are experimentally characterized and combined with detailed multiphysics numerical simulations to extract locomotion mechanisms in both directions. It is shown that by changing the shape of the cuts and orientation of the magnet the robot can be steered, and if combined with translational motion of the magnet, complex crawling paths are programed. The proposed magnetic kirigami robot offers a simple approach to developing untethered soft robots with programmable motion
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New Developments in MadGraph/MadEvent
We here present some recent developments of MadGraph/MadEvent since the latest published version, 4.0. These developments include: Jet matching with Pythia parton showers for both Standard Model and Beyond the Standard Model processes, decay chain functionality, decay width calculation and decay simulation, process generation for the Grid, a package for calculation of quarkonium amplitudes, calculation of Matrix Element weights for experimental events, automatic dipole subtraction for next-to-leading order calculations, and an interface to FeynRules, a package for automatic calculation of Feynman rules and model files from the Lagrangian of any New Physics model