Results 211 to 220 of about 504,253 (264)

Forerunners of four legs

Nature, 1998
Since the 1930s, palaeontologists have thought that four-legged land vertebrates (or tetrapods) evolved from a group of lobe-finned fishes called osteolepiforms. This is now confirmed by an analysis of the osteolepiforms, which concludes that they are actually an ensemble of primitive tetrapodomorphs.
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Walk Calibration in a Four-legged Robot

2006
The use of walk calibration using machine learning proved to be feasible, as well as necessary, specially when changing the walking surface. The TeamChaos improved its maximum speed a 30% using simulated annealing. On the other hand, using multiple parameters sets allowed us to improve the speed response by fixing the discontinuities in the speed space.
Boyan Bonev 0001, Miguel Cazorla, Humberto Martínez   +2 more
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A tale with four legs

BSAVA Companion, 2016
Bruce Vivash Jones, BSAVA founder member and Senior Vice Chairman of the Veterinary History Society, tells the story of an interesting table.
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Player Positioning in the Four-Legged League

2009
As RoboCup continues its march towards the day when robots play soccer against people, the focus of researchers' efforts is slowly shifting from low-level systems (vision, motion, self-localization, etc) to high-level systems such as strategy and cooperation.
Henry Work, Eric Chown, Tucker Hermans, Jesse Butterfield, Mark McGranaghan 0001   +4 more
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WALK ON FOUR LEGS NOT ON TWO

Journal of Experimental Biology, 2004
![Figure][1] When walking, most mammalian quadrupeds use lateral-sequence gaits, where hindlimb footfall is followed by the ipsilateral (same-side) forelimb. By contrast, primates generally use what is known as a diagonal-sequence gait; after one hindlimb makes ground contact ...
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Research of three-phase four-leg rectifier

IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society, 2012
The three-phase four-leg rectifier can be obtained by adding a bridge into the traditional three-phase three-leg rectifier. The cycle by cycle switch average model (CCA) based on three-phase four-leg rectifier is presented in the paper, and the model shows the rectifier can de decoupled to three single phase full bridge rectifiers. The SPWM (Sinusoidal
Xin Chen 0068, Zheng Wei, Huizhen Wang, Chensong Li, Chunying Gong   +4 more
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ON FOUR LEGS TOWARDS FLEXIBLE AND FAST LOCOMOTION

Advances in Climbing and Walking Robots, 2007
The breathtaking development of electronic components is one key factor in the fast evolution of mobile robots. Depending on the mission, robots might operate autonomously or in cooperation with a human operator. In either case the locomotion of the robot is a key element. In general, legged systems are more flexible compared to wheel based systems and
C. KARA, C. HECKHOFF, T. BRANDT, D. SCHRAMM   +3 more
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Horsing Around: Spontaneous Four-Legged Coordination

Journal of Motor Behavior, 2009
Motivated by previous research suggesting that informational and mechanical interlimb coupling can stabilize rhythmic movement patterns, the authors show that stable 4-legged patterns between 2 individuals, either walking or running, can emerge unintentionally from simple forms of coupling.
Steven J, Harrison, Michael J, Richardson   +1 more
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Four-leg independent mechanism for MEMS microrobot

Artificial Life and Robotics, 2017
In this paper, the development of a quadruped micro-electro mechanical system (MEMS) microrobot with a four-leg independent mechanism is described. As the actuator mechanism inside small robot bodies is difficult to realize, many microrobots use external field forces such as magnetism and vibration.
Daisuke Tanaka, Yuto Uchiumi, Satoshi Kawamura, Minami Takato, Ken Saito, Fumio Uchikoba   +5 more
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AIMEE: A Four-Legged Robot for RoboCup Rescue

2006
This paper presents a servo-based four-legged robot — named AIMEE — for the RoboCup Rescue competition.
Martin R. Albrecht, Till Backhaus, Steffen Planthaber, Henning Stöpler, Dirk Spenneberg, Frank Kirchner   +5 more
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