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In nature, limbless locomotion is adopted by a wide range of organisms at various length scales. Interestingly, undulatory, crawling and inching/looping gait constitutes a fundamental class of limbless locomotion and is often observed in…

Optimization and Control · Mathematics 2023-07-28 Ashutosh Bijalwan , Jose J Munoz

Creating finite element models for simulation of bone behaviour, fracture occurrence and propagation requires feeding the system with adequate mechanical data. To date, little is known about the mechanical behaviour of long canine bones,…

Animals can finely modulate their leg stiffness to interact with complex terrains and absorb sudden shocks. In feats like leaping and sprinting, animals demonstrate a sophisticated interplay of opposing muscle pairs that actively modulate…

Robotics · Computer Science 2025-04-29 Erik Mortensen , Jan Petrs , Alexander Dittrich , Dario Floreano

This paper delineates the formulation and verification of an innovative robotic forearm and elbow design, mirroring the intricate biomechanics of human skeletal and ligament systems. Conventional robotic models often undervalue the…

Robotics · Computer Science 2023-10-30 Haosen Yang , Guowu Wei , Lei Ren

The musculoskeletal humanoid is difficult to modelize due to the flexibility and redundancy of its body, whose state can change over time, and so balance control of its legs is challenging. There are some cases where ordinary PID controls…

Legged robots have the ability to adapt their walking posture to navigate confined spaces due to their high degrees of freedom. However, this has not been exploited in most common multilegged platforms. This paper presents a deformable…

Complexity and heterogeneity of bone tissue require a multiscale modelling to understand their mechanical behaviour and their remodelling mechanism. Human cortical bone structure consists of six structural scale levels which are the…

Medical Physics · Physics 2011-12-07 Abdelwahed Barkaoui , Ridha Hambli

Human impedance parameters play an integral role in the dynamics of strength amplification exoskeletons. Many methods are used to estimate the stiffness of human muscles, but few are used to improve the performance of strength amplification…

Systems and Control · Electrical Eng. & Systems 2020-08-04 Huang Huang , Henry F. Cappel , Gray C. Thomas , Binghan He , Luis Sentis

Legged locomotion is a highly promising but under-researched subfield within the field of soft robotics. The compliant limbs of soft-limbed robots offer numerous benefits, including the ability to regulate impacts, tolerate falls, and…

If robots are to become ubiquitous, they will need to be able to adapt to complex and dynamic environments. Robots that can adapt their bodies while deployed might be flexible and robust enough to meet this challenge. Previous work on…

Robotics · Computer Science 2019-07-24 Tønnes F. Nygaard , Charles P. Martin , Jim Torresen , Kyrre Glette

A distinctive feature of quadrupeds that is integral to their locomotion is the tail. Tails serve many purposes in biological systems including propulsion, counterbalance, and stabilization while walking, running, climbing, or jumping.…

Robotics · Computer Science 2023-04-12 Josh Buckley , Yasemin Ozkan-Aydin

This letter presents a novel approach to extract reliable dense and long-range motion trajectories of articulated human in a video sequence. Compared with existing approaches that emphasize temporal consistency of each tracked point, we…

Computer Vision and Pattern Recognition · Computer Science 2016-03-30 Yuanyuan Wu , Xiaohai He , Byeongkeun Kang , Haiying Song , Truong Q. Nguyen

Surface constructs in snakes reflect desirable design traits for technical surface engineering. Their micro-textural patterns, however, do not lend themselves easily to unified analysis due to species-specific variations in surface geometry…

Biological Physics · Physics 2015-01-26 Hisham A. Abdel-Aal , M. El Mansori

The electronic structure of magnetic lanthanide atoms is fascinating from a fundamental perspective. They have electrons in a submerged open 4f shell lying beneath a filled 6s shell with strong relativistic correlations leading to a large…

Quantum Physics · Physics 2021-09-01 Eite Tiesinga , Jacek Klos , Ming Li , Alexander Petrov , Svetlana Kotochigova

Some of the most challenging environments on our planet are accessible to quadrupedal animals but remain out of reach for autonomous machines. Legged locomotion can dramatically expand the operational domains of robotics. However,…

Robotics · Computer Science 2020-10-23 Joonho Lee , Jemin Hwangbo , Lorenz Wellhausen , Vladlen Koltun , Marco Hutter

Soft tissues - such as ligaments and tendons - primarily consist of solid (collagen, predominantly) and liquid phases. Understanding the interaction between such components and how they change under physiological loading sets the basis for…

Phonons in solid materials can be understood as the Goldstone bosons of the spontaneously broken spacetime symmetries. As such their low energy dynamics are greatly constrained and can be captured by standard effective field theory (EFT)…

High Energy Physics - Theory · Physics 2020-06-11 Lasma Alberte , Matteo Baggioli , Victor Cancer Castillo , Oriol Pujolas

Existing digital human models approximate the human skeletal system using rigid bodies connected by rotational joints. While the simplification is considered acceptable for legs and arms, it significantly lacks fidelity to model rich torso…

Graphics · Computer Science 2023-05-10 Seunghwan Lee , Yifeng Jiang , C. Karen Liu

Transport networks play a key role across four realms of eukaryotic life: slime molds, fungi, plants, and animals. In addition to the developmental algorithms that build them, many also employ adaptive strategies to respond to stimuli,…

Adaptation and Self-Organizing Systems · Physics 2014-06-02 Johannes Gräwer , Carl D. Modes , Marcelo O. Magnasco , Eleni Katifori

Unknown dynamic load carrying is one important practical application for quadruped robots. Such a problem is non-trivial, posing three major challenges in quadruped locomotion control. First, how to model or represent the dynamics of the…

Robotics · Computer Science 2025-07-11 Leixin Chang , Yuxuan Nai , Hua Chen , Liangjing Yang