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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Autonomous cricket biosensors for acoustic localization

Mulcahey, Thomas Ian 08 April 2010 (has links)
The goal of this project was to design networked arrays of cricket biosensors capable of localizing sources such as footsteps within dangerous environments, with a possible application to earthquake detection. We utilize the cricket's natural ability to localize low frequency (5 Hz - 600 Hz) acoustic sources using hair-covered appendages called cerci. Whereas previous investigations explored crickets' neurological response to near field flows generated by single frequency steady-state sounds, we investigated the effects of transient waveforms, which better represent real world stimuli, and to which the cercal system appears to be most reactive. Extracellular recording electrodes are permanently implanted into a cricket's ventral nerve cord to record the action potentials emanating from the cerci. In order to calibrate this system, we attempt to find the relationships between the frequency and direction of acoustic stimuli and the neurological responses known as spike trains, which they elicit. The degree of habituation to repeated signals that exists in most neurological systems was also experimentally measured. We process the signals to estimate frequency and directionality of near field acoustic sources. The design goal is a bionic cricket-computer system design capable of localizing low frequency near field acoustic signals while going about its natural activities such as locomotion.
2

Sensorimotor integration and the role of the cercal system in the reproductive behavior of the cricket, Acheta domesticus

Snell, Lewis Casbeer. January 2005 (has links)
Thesis (Ph. D.)--Miami University, Dept. of Zoology, 2005. / Title from second page of PDF document. Includes bibliographical references (p. 100-108).
3

Sensorimotor Integration And The Role Of The Cercal System In The Reproductive Behavior Of The Cricket, <i>Acheta Domesticus</i>

Snell, Lewis Casbeer 05 August 2005 (has links)
No description available.
4

Neural processing of chemosensory information from the locust ovipositor / Neural processing of chemosensory information from the locust ovipositor

Tousson, Ehab 03 May 2001 (has links)
No description available.
5

Phylogeny of the Genus <i>Argia</i> (Odonata: Coenagrionidae) with Emphasis on Evolution of Reproductive Morphology

Caesar, Ryan Matthew 26 June 2012 (has links)
No description available.
6

Steuerung der Beinmotorik von Grillen durch ein Paar gravizeptiver Interneurone / Control of leg motor activity via a pair of graviceptive interneurons in crickets

Funke, Frank 04 November 2004 (has links)
No description available.

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