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Related Concept Videos

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The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
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The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
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Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
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Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
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A Web Tool for Generating High Quality Machine-readable Biological Pathways
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Reactive shepherding along a dynamic path.

Stef Van Havermaet1, Yara Khaluf2,3, Pieter Simoens2

  • 1IDLab, Department of Information Technology, Ghent University - imec, B-9052, Gent, Belgium. stef.vanhavermaet@ugent.be.

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Summary
This summary is machine-generated.

This study introduces a multi-robot shepherding algorithm to guide groups along paths while keeping them within boundaries. Simulations show challenges with sharp turns and highlight the impact of robot-group size and velocity.

Keywords:
Reactive path planningShepherding

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Area of Science:

  • Robotics
  • Artificial Intelligence
  • Control Systems

Background:

  • Shepherding is crucial for animal herding, crowd control, and evacuations.
  • Robotic shepherding offers efficiency and cost reduction but lacks trajectory constraints.
  • Existing systems guide herds to goals but don't manage boundaries or avoid obstacles.

Purpose of the Study:

  • To develop a decentralized multi-robot shepherding algorithm.
  • To guide a group along a specified path with defined boundaries.
  • To ensure the group remains within these boundaries during transit.

Main Methods:

  • A decentralized control algorithm for multi-robot systems.
  • Simulations to test the algorithm's performance.
  • Analysis of group deviation from the path and boundaries.

Main Results:

  • The algorithm guides groups along paths with boundaries.
  • Groups tend to deviate in sharp turns or narrow paths.
  • Performance is sensitive to robot-group size ratio and group velocity.

Conclusions:

  • The developed algorithm addresses path following and boundary maintenance.
  • Further research is needed to mitigate deviations in challenging path sections.
  • Optimizing robot-group size and velocity is key for effective robotic shepherding.