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:4/20/2015)... PASADENA, Calif. , April 20, 2015 ... San Gabriel Valley to implant a new miniaturized, wireless ... HF System is the first and only FDA-approved heart ... reduce hospital admissions when used by physicians to manage ... a sensor that is implanted in the pulmonary artery ...
(Date:4/13/2015)... 13, 2015 According to ... Biometrics Market Forecast & Opportunities, 2020", the global biometrics ... around 14% till 2020. The biometrics market is ... implementation and review of biometric management systems. The ... products with greater efficiency, are resulting in increasing ...
(Date:4/6/2015)... 6, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... company focused on the growing mobile commerce market, ... 62/143028 for MINIATURE, MULTI-PURPOSE ANTENNA METHOD AND ... NXT-ID introduces a new revolutionary method and ... the use of miniature antenna modules for multiple ...
Breaking Biology News(10 mins):Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 2Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2NXT-ID Patents Miniature, Low Power Wireless Magnetic Stripe 2NXT-ID Patents Miniature, Low Power Wireless Magnetic Stripe 3NXT-ID Patents Miniature, Low Power Wireless Magnetic Stripe 4
(Date:4/24/2015)... N.J. , April 24, 2015  Navitas Life Sciences ... as Head of Clinical and Regulatory Services. Shalabh is ... been a co-founder and CEO of Kinapse, as well as ... Logo - http://photos.prnewswire.com/prnh/20150423/201261LOGO ... Jim Tizzard commented "I am delighted to welcome Shalabh ...
(Date:4/23/2015)... 23, 2015 The Thomas Brain ... conduct a groundbreaking pilot study to see if ... in as little as three to six months. ... and nutritional medicine—will aggressively target and simultaneously treat ... our aging brain. These include oxidative stress, neuroinflammation, ...
(Date:4/23/2015)... WuXi PharmaTech (Cayman) Inc. (NYSE: WX ... company serving the pharmaceutical, biotechnology and medical device industries, ... the United States , today announced ... quarter of 2015 after the New York Stock Exchange ... Thursday morning, May 14, 2015 Shanghai time). The earnings ...
(Date:4/23/2015)... April 23, 2015 Glemser ... the first EMC® Enterprise Content Division (ECD) Certified ... EMC Documentum® for Life Sciences Solution Suite ... knowledge and capabilities to provide life sciences companies ... , The EMC Documentum Solution Suite offers ...
Breaking Biology Technology:Shalabh Kumar Joins Navitas Life Sciences to Lead their Clinical and Regulatory Services Teams 2New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3WuXi PharmaTech Schedules First-Quarter 2015 Earnings Release 2WuXi PharmaTech Schedules First-Quarter 2015 Earnings Release 3Glemser Earns Accreditation for Life Sciences Solution Suite 2
Cached News: