Sentences with phrase «of robotic fish»

With so many robotic fish projects in the works, it seems like we'll have quite a bit of biotech - diversity among «species» of robotic fish out in the ocean, all collecting climate change data.

While using shoals of robotic fish for pollution detection in harbours might appear like something straight out of science fiction, there are very practical reasons for choosing this form.

In this study, we have proposed an implementation of a robotic fish to investigate the interplay between visual and flow cues in the phenomenon of schooling in carangiform social fish.

The authors would like to gratefully acknowledge Dr. A. L. Facci for the technical support on PIV measurements, Mr. M. Drago for the technical support on the design of the robotic fish prototype, Ms. L. Yang and Mr. K. Khan for their valuable help in performing the experiments, and Dr. S. Macri for the useful discussion and the assistance with the behavioral classification using the software Observer.

The comparison between model results and robotic fish undulations was subsequently performed to validate the ability of the robotic fish to reproduce carangiform swimming.

Specifically, the tail - beat frequency of the robotic fish was varied from 0 Hz to 2 Hz, 3 Hz, and 4 Hz.

In other words, the time spent by fish in the vicinity of the two prototypes was compared to detect the role of the robotic fish color pattern on fish spatial preference.

In the Top view, the focal region was further divided in two equal sub-regions: i) frontal compartment (referred to as «front») comprising the half of the focal region in front of the robotic fish and ii) four equal compartments of one body length each (referred to as «B1», «B2», «B3», and «B4», respectively) behind the robot, see Figure 4.

Supporting material on the visual aspect of the robotic fish, the measurement of golden shiners» tail - beat frequency, the motion tracking of the robotic fish, the particle image velocimetry analyses.

Specifically, the center of mass of the robotic fish was placed in the middle of the water column, that is, seven cm from both the water surface and the bottom of the water tunnel, and it was positioned 50 cm from both left and right honeycombs.

Our results show that fish positional preference is affected by the color of the robotic fish, whereby a prototype with a bioinspired color pattern (Gray robot) is more attractive than a red replica (Red robot).

Following standard practice [20], [62], [63], particle image velocimetry (PIV) was implemented in the hydrodynamics experiment of this study to perform instantaneous flow measurements in the wake of the robotic fish, see Figure 3.

To assess the degree of biomimicry in the robotic fish design, the undulations of the robotic fish were compared with classical models of carangiform swimming [60].

In this work, we employ two prototypes of robotic fish, whose engineering design was bioinspired to mimic the aspect ratio, body shape, size, and species - specific locomotion pattern observed in live golden shiner.

The center of mass of the robotic fish corresponded to the link from which the input from the external servomotor was transmitted to the robot through the rotation of the Plexiglas rod.

Specifically, the following predictions are expected to be met: i) fish attraction toward the robotic fish should vary as the visual cues offered by the robotic fish are varied, in agreement with similar observations for zebrafish in [35]--[37]; ii) fish attraction should vary as a function of the robotic fish tail - beat frequency, as suggested in [60] and observed in [20]; and iii) the highest attraction should be reached when both visual and flow cues from the live fish are simultaneously integrated in the robotic fish prototype.

The laser was aimed to the side of the robotic fish so that its perspective was orthogonal to the camera axis underneath the water tunnel.

Specifically, in this series of works it is demonstrated that the behavioral response of zebrafish individuals and small shoals varies as the aspect ratio, color pattern, and tail - beat frequency of a robotic fish is changed.

In these conditions, fish tend to swim at the same depth of the robotic fish, where the wake from the robotic fish is stronger and hydrodynamic return is most likely to be effective.

Specifically, undulations of the robotic fish and six additional golden shiner were analyzed using ProAnalyst (Xcitex Inc., Cambridge, MA, USA) motion tracking system.

Specifically, we change the speed of the robotic fish by varying the tail - beat frequency of the robotic fish, while keeping the tail beat amplitude constant.

Future work will be driven in several directions, including the dependence of zebrafish shoal size on its response [56] to the robotic fish, and conversely, the dependence of the size and configuration of a shoal of robotic fish on zebrafish response.

We expect the following predictions to be met: (i) a free - swimming robot whose design and movement are inspired by a zebrafish will not elicit fear response in zebrafish; (ii) the subjects will change their social interaction in the presence of the robotic fish; and (iii) the speed of the robotic fish will differentially modulate fish collective behavior.

Because the robo - fish that he and Youcef - Toumi have created is made from a single piece of polymer, it is easier to make watertight than previous generations of robotic fish.

But the new version — called SoFi, for Soft Robotic Fish — is a step up from previous generations of robotic fish because it can be maneuvered up and down to depths of up to 18 meters.

Not exact matches

Liane Thompson CEO — Aquaai https://www.aquaai.com/ Aquaai creates autonomous bio-inspired marine platforms (robotic fish) for a myriad of use cases.

Most robotic fish are like fish out of water: They're surprisingly poor swimmers, and they often scare away any other creatures they come in contact with.

«We expected maybe one or two fish, but to see such a big group was amazing,» says Monty Priede, director of the University of Aberdeen's Oceanlab, which specializes in robotic exploration of the deep sea.

The Persian carpet flatworm, the cuttlefish and the black ghost knifefish look nothing like each other — their last common ancestor lived 550 million years ago, before the Cambrian period — but a new study uses a combination of computer simulations, a robotic fish and video footage of real fish to show that all three aquatic creatures have evolved to swim with elongated fins using the same mechanical motion that optimizes their speed, helping to ensure their survival.

A robotic fish is going to use sensors to monitor the levels of anibiotics in Michigan's Great Lakes region

Many of these new tools look like robotic fish, but the University of Washington sent a robotic surf board to ride the waves collecting data from Antarctica to South America.

As I leave the laboratory, I envision a day when prehensile android extensions of our minds perform our surgeries, fight our wars, file our taxes, coddle our young, bury our dead, walk our robotic pets and change their batteries, fish the remote from underneath the sofa, fetch us a turkey potpie, and steal our hearts.

Valdivia y Alvarado and Youcef - Toumi benefited from a wealth of data produced by previous robotic fish research.

Other robotic fish experiments have been conducted by the University of Essex in England, the California Institute of Technology and several others.

It's only a $ 100 toy — an aquarium of swimming robotic fish developed by the Eamex Corporation in Osaka, Japan.

Long discusses his use of autonomous robotic fish to study vertebrate biomechanics and evolution.

Although the use of rigid metal and plastic parts tends to result in stiff, mechanical motion, a team at the Massachusetts Institute of Technology (M.I.T.) is experimenting with the use of a single piece of flexible silicon and urethane polymer to create robotic fish that smoothly wriggle through the water much like their natural counterparts.

In collaboration with doctoral candidate Paul Phamduy and NYU - Poly research scholar Giovanni Polverino, Porfiri designed an experiment to examine the interplay of visual cues and flow cues — changes in the water current as a result of tail - beat frequency — in triggering a live golden shiner fish to either approach or ignore a robotic fish.

These studies are the latest in a significant body of research by Porfiri and collaborators utilizing robots, specifically robotic fish, to impact collective animal behavior.

«To our knowledge, this is the first robotic fish that can swim untethered in three dimensions for extended periods of time,» says Robert Katzschmann, one of the team at the Massachusetts Institute of Technology behind SoFi.

Grant funding has allowed Long to hire Porter as a postdoc and Nick Livingston, a master's degree level engineer (and Ken's son) to run the day - to - day operations of the Fish Fellows program and the robotics laboratory.

We would like to acknowledge assistance from Paul Phamduy, Vladislav Kopman, Fausto Del Sette, Pankaj Rajput, Fabrizio Ladu, and Violet Mwaffo in fabricating the robotic fish and independent verification of the trajectory data.

The results indicate that, obtained with a tail - beat frequency of, is a critical speed for the robotic fish, with increases above or below this threshold differentially affecting zebrafish collective response.

We utilize such robotic fish to investigate the collective response of groups of zebrafish.

The color pattern, aspect ratio, and shape of the caudal fin of the mobile robotic fish used in our experiments matched that of a zebrafish.

In the context of ethorobotics, we have recently proposed a series of dichotomous preference tests to study zebrafish response to an anchored robotic fish whose design is inspired by salient features of attraction in zebrafish.

Specifically, in [12], it is shown that zebrafish responds differentially to variation in aspect ratio and color in the robotic fish; in [13], it is demonstrated that zebrafish shoals prefer such a robotic fish to an empty compartment; in [14], it is demonstrated that an interactive robot, whose tail - beat frequency responds to fish position, is able to induce preference among single organisms; and in [17], it is shown that the robotic fish is able to simultaneously attract shoals of zebrafish while repelling shoals of mosquitofish that would otherwise display aggressive behavior.

Therefore, we propose that visual cues associated with the motion of the robot at are relevant factors in shaping the interaction between the live subjects and the robotic fish.

Finally, in [16], the robotic fish is utilized as a tool to analyze the effect of ethanol administration on zebrafish behavior.

Citation: Butail S, Bartolini T, Porfiri M (2013) Collective Response of Zebrafish Shoals to a Free - Swimming Robotic Fish.