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  • Cybernetics, Artificial Intelligence and Robotics  (2)
  • Hyalella azteca  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 213 (1991), S. 125-132 
    ISSN: 1573-5117
    Keywords: diet ; Hyalella azteca ; chironomid larvae ; temperature tolerant foraging habits ; predation ; Catostomus commersoni
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Abundances of white sucker, 100–500 mm FL, were not significantly different among the epilimnia, metalimnia and portions of the hypolimnia shallower than 20 m in each of two lakes. However, small suckers 〈 200 mm were captured most frequently in the epilimnion and no white suckers were captured in the deepest region, 20–38 m, of the two lakes. White suckers consumed prey from all three temperature zones in each lake. Prominent food items were Hyalella azteca and the chironomid larvae Heterotrissocladius, Djalmabatista and Procladius. Despite differences in relative densities of benthic invertebrates among thermal zones of the two lakes, suckers in neither lake foraged exclusively on prey of epilimnetic origin. Suckers captured in the metalimnia foraged on invertebrates that were common to all three thermal zones. And, only 0–4% of the suckers captured in the hypolimnia of the two lakes contained prey that were unique to the epilimnia. Suckers caught in the hypolimnia mainly consumed deep water invertebrates; 83% of the suckers foraged in the metalimnion and hypolimnion of Islets Lake and 45% foraged in the hypolimnion in Burnt Island Lake. Consequently there was little evidence of a massive inshore feeding migration followed by a post-feeding return to the hypolimnion. Northern pike and lake trout rarely fed on white suckers in these lakes and thus piscivory was an unlikely factor in the observed distribution of suckers.
    Type of Medium: Electronic Resource
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  • 2
    Publication Date: 2019-07-13
    Description: This video shows a demonstration of collaborative autonomous logistics. Turtlebot, a 1-g stand-in for Astrobee, carried REALM sensors around a mockup of ISS in ARGOS to autonomously survey for a cargo bag stowed in a drawer. It provided the location of the bag to Robonaut, which then autonomously climbed across the mockup to the drawer. Robonaut then used the Affordance Template manipulation framework to localize and open the drawer and then again localize and retrieve the cargo bag.
    Keywords: Cybernetics, Artificial Intelligence and Robotics
    Type: JSC-E-DAA-TN57977 , World Gas Conference; Jun 25, 2018 - Jun 29, 2018; Washington, DC; United States
    Format: text
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  • 3
    Publication Date: 2019-07-13
    Description: Teleoperation is the dominant form of dexterous robotic tasks in the field. However, there are many use cases in which direct teleoperation is not feasible such as disaster areas with poor communication as posed in the DARPA Robotics Challenge, or robot operations on spacecraft a large distance from Earth with long communication delays. Presented is a solution that combines the Affordance Template Framework for object interaction with TaskForce for supervisory control in order to accomplish high level task objectives with basic autonomous behavior from the robot. TaskForce, is a new commanding infrastructure that allows for optimal development of task execution, clear feedback to the user to aid in off-nominal situations, and the capability to add autonomous verification and corrective actions. This framework has allowed the robot to take corrective actions before requesting assistance from the user. This framework is demonstrated with Robonaut 2 removing a Cargo Transfer Bag from a simulated logistics resupply vehicle for spaceflight using a single operator command. This was executed with 80% success with no human involvement, and 95% success with limited human interaction. This technology sets the stage to do any number of high level tasks using a similar framework, allowing the robot to accomplish tasks with minimal to no human interaction.
    Keywords: Cybernetics, Artificial Intelligence and Robotics
    Type: JSC-CN-39110 , IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) 2017; Sep 24, 2017 - Sep 28, 2017; Vancouver; Canada
    Format: application/pdf
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