HOME >> BIOLOGY >> NEWS
Tomorrow's super robots may owe their mobility to a cockroachs legs today

hysiological Society (APS) August 24-28, 2002 at the Town & Country Hotel, San Diego, CA. To learn more about the conference and presentations, go to: http://www.the-aps.org/meetings/aps/san_diego/home.htm

Methodology

Relaxation and dynamic experiments were carried out on the hind leg of Blaberus discoidalis to aid in the selection of a material behavior model and to quantify measures of roach leg response. During testing, the coxa of the ablated metathoracic limb (hind limb) of the cockroach was epoxied to 3/8" acrylic such that the coxa-femur and femur-tibia joints were free to rotate. Cyanoacrylate was used to attach one end of a stainless steel pin to the distal tip of the tibia; dental impression compound was used to adhere the other end of the pin to the arm of a servo-motor system. The leg was then displaced with the Aurora system, which is based upon a high performance rotary moving coil motor supported by precision ball bearings. The results are that the total error in the force-displacement measurements to be less than four percent that of a viscoelastic solid.

Results

The results indicate that a cockroach leg excited in a direction orthogonal to the joint direction behaves similarly to a viscoelastic material. The exponential nature of the force relaxation curves suggests viscoelasticity. The hysteretic nature of the force-displacement curves indicates that there is energy loss due to the internal friction, which is a common characteristic for viscoelastic materials. The cockroach leg is subject to a combination of bending and torsion in the experiment. The overall effect can be modeled as a torsion spring with a moment arm. Additional assumptions for the model include: (1) the axis of rotation for the leg is constant during torsion and (2) the joint material can be approximated using a lumped-parameter element with uniformly distributed linear viscoelastic p
'"/>

Contact: Donna Krupa
djkrupa1@aol.com
703-967-2751
American Physiological Society
26-Aug-2002


Page: 1 2 3 4 5

Related biology news :

1. Sandia Decontamination Foam May Be Tomorrows Best First Response In A Chem-Bio Attack
2. Gene chips research in cotton could lead to superior variety
3. Flame retardants found on supermarket shelves
4. UCSD biologists develop super-endurance strain of mice
5. Birds show superior listening skills
6. Scientists question reports of massive ant supercolonies in California and Europe
7. Knock out rose receives Texas superstar and earthkind designation
8. Frog skin and supercomputers lead Penn chemists to designing better bacteria killers
9. A possible new form of supersolid matter
10. St. Jude ranked among top 500 supercomputer centers
11. Gene mutation leads to super-virulent strain of TB

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Tomorrow super robots may owe their mobility cockroachs legs today

(Date:11/3/2014)... Researchers from Australia report that low birth weight and ... (OA)-related hip replacements in adulthood. Findings published in the ... & Research , indicate that low birth weight and ... arthroplasty due to OA as adults. , According ... of 25 are diagnosed with clinical OA. Symptoms of ...
(Date:11/2/2014)... it was fascinating to put a flashlight up to ... hand. Washington University in St. Louis engineers are using ... tissues to improve imaging of cancerous tissues and to ... Gene K. Beare Distinguished Professor of Biomedical Engineering at ... a novel time-reversal technology that allows researchers to better ...
(Date:10/31/2014)... In the early 1900s, Brazil was the world,s largest ... were cultivated in a 800, 000 ha region of ... canopy of native shade trees. Whereas the surrounding rainforest ... derived mainly from a handful of seeds introduced in ... variation. According to Brazilian scientist Gonçalo Pereira, "This scenario ...
Breaking Biology News(10 mins):Preterm, low birth-weight babies may need new hips in adulthood 2Improving imaging of cancerous tissues by reversing time 2Scientists seek cure for devastating witches' broom disease of the chocolate tree 2Scientists seek cure for devastating witches' broom disease of the chocolate tree 3
(Date:11/15/2014)... Biofuels will present at CleanEquity Monaco 2015 on March 5th ... . Logo - http://photos.prnewswire.com/prnh/20141114/158674LOGO ... by Innovator Capital, the London based ... Prince Albert II of Monaco,s ... Monte-Carlo SBM, Oceanographic Museum of Monaco , ...
(Date:11/15/2014)... Nov. 14, 2014  F. David Rollo , ... Who as a Pinnacle Professional in the field of ... of Cell Point, LLC. Cell Point is ... Centennial, Colorado , Houston ... company,s five technology platforms, ethylenedicysteine drug conjugate technology ("EC ...
(Date:11/12/2014)... Research Labs (a registered trade name of ReachBio LLC, ... it has signed an agreement with Funakoshi Co., Ltd. ... distribution rights to ReachBio,s human primary cell product line ... Japan . Under a companion agreement, Funakoshi will ... drug development companies. Photo - http://photos.prnewswire.com/prnh/20141111/157946LOGO ...
(Date:11/12/2014)... (PRWEB) November 11, 2014 ... and one year of achieving GMP compliance with ... clearly defined and impressive blueprint for creating high ... and Requisition process and ending with the final ... where each product is in the process,” explains ...
Breaking Biology Technology:Algenol Biofuels Selected to Present at CleanEquity Monaco 2015 2F. David Rollo, MD, Ph.D., FACC, FACNP is recognized by Continental Who's Who as a Pinnacle Professional 2Funakoshi to Distribute ReachBio Research Labs Human Primary Cell Products in Japan 2Funakoshi to Distribute ReachBio Research Labs Human Primary Cell Products in Japan 3Innovative Formulations Achieves GMP Compliance and Success with InstantGMP™ MES 2
Cached News: