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Start Over Author "Goldman, Daniel" Journal physical review letters
15 results on '"Goldman, Daniel"'

2. Emergent Field-Driven Robot Swarm States

Author

Wang, Gao, primary, Phan, Trung V., additional, Li, Shengkai, additional, Wombacher, Michael, additional, Qu, Junle, additional, Peng, Yan, additional, Chen, Guo, additional, Goldman, Daniel I., additional, Levin, Simon A., additional, Austin, Robert H., additional, and Liu, Liyu, additional

Published
2021
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10. Persistent Holes in a Fluid

Author

Merkt, Florian S., primary, Deegan, Robert D., additional, Goldman, Daniel I., additional, Rericha, Erin C., additional, and Swinney, Harry L., additional

Published
2004
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14. Emergent Field-Driven Robot Swarm States.

Author

Gao Wang, Phan, Trung V., Shengkai Li, Wombacher, Michael, Junle Qu, Yan Peng, Guo Chen, Goldman, Daniel I., Levin, Simon A., Austin, Robert H., and Liyu Liu

Subjects
*WASTE recycling, *LIGHT intensity, *ROBOTS, *LIGHT emitting diodes, *SYMMETRY breaking
Abstract

We present an ecology-inspired form of active matter consisting of a robot swarm. Each robot moves over a planar dynamic resource environment represented by a large light-emitting diode array in search of maximum light intensity; the robots deplete (dim) locally by their presence the local light intensity and seek maximum light intensity. Their movement is directed along the steepest local light intensity gradient; we call this emergent symmetry breaking motion "field drive." We show there emerge dynamic and spatial transitions similar to gas, crystalline, liquid, glass, and jammed states as a function of robot density, resource consumption rates, and resource recovery rates. Paradoxically the nongas states emerge from smooth, flat resource landscapes, not rough ones, and each state can directly move to a glassy state if the resource recovery rate is slow enough, at any robot density. [ABSTRACT FROM AUTHOR]

Published
2021
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15. Drag induced lift in granular media.

Author

Ding Y, Gravish N, and Goldman DI

Subjects
Animals, Computer Simulation, Friction, Humans, Motion, Shear Strength, Stress, Mechanical, Colloids chemistry, Gait physiology, Locomotion physiology, Models, Biological, Models, Chemical
Abstract

Laboratory experiments and numerical simulation reveal that a submerged intruder dragged horizontally at a constant velocity within a granular medium experiences a lift force whose sign and magnitude depend on the intruder shape. Comparing the stress on a flat plate at varied inclination angle with the local surface stress on the intruders at regions with the same orientation demonstrates that intruder lift forces are well approximated as the sum of contributions from flat-plate elements. The plate stress is deduced from the force balance on the flowing media near the plate.

Published
2011
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