Results 91 to 100 of about 461,030 (283)

Satellite Kinematics I: A New Method to Constrain the Halo Mass-Luminosity Relation of Central Galaxies

, 2008
Satellite kinematics can be used to probe the masses of dark matter haloes of central galaxies. In order to measure the kinematics with sufficient signal-to-noise, one uses the satellite galaxies of a large number of central galaxies stacked according to
Becker, Blanton, Brainerd, Cacciato, Carlberg, Carlberg, Colless, Conroy, Diemand, Erickson, Frank C. van den Bosch, Gavazzi, Klypin, Koester, Kravtsov, Macciò, Mandelbaum, Marcello Cacciato, McKay, More, Navarro, Norberg, Prada, Rubin, Rykoff, Surhud More, Tasitsiomi, Tinker, van den Bosch, van den Bosch, Wang, Yang, Yang, Yang, Yang, York, Zaritsky, Zaritsky, Zaritsky   +38 more
core   +1 more source

Learning Highly Dynamic Skills Transition for Quadruped Jumping Through Constrained Space

Advanced Robotics Research, EarlyView.
A quadruped robot masters dynamic jumps through constrained spaces with animal‐inspired moves and intelligent vision control. This hierarchical learning approach combines imitation of biological agility with real‐time trajectory planning. Although legged animals are capable of performing explosive motions while traversing confined spaces, replicating ...
Zeren Luo, Jiahui Zhang, Yimin Han, Ji Ma, Minghao Lu, Ioannis Havoutis, Peng Lu   +6 more
wiley   +1 more source

Infant-carrying mechanisms in a natural environment: the case of Qashqai nomad

Evolutionary Human Sciences
Infant carrying and more generally load carrying may impact bipedal locomotion and thus the energy cost of the daily activities, in living people but also in our ancestors.
Zohreh Anvari, Gilles Berillon, Kristiaan D'Août, Dominique Grimaud-Hervé, Mahtab Rezaei   +4 more
doaj   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source

Effects of peak ankle dorsiflexion angle on lower extremity biomechanics and pelvic motion during walking and jogging

Frontiers in Neurology
ObjectiveAnkle dorsiflexion during walking causes the tibia to roll forward relative to the foot to achieve body forward. Individuals with ankle dorsiflexion restriction may present altered movement patterns and cause a series of dysfunction.
Yi Rao, Yi Rao, Nan Yang, Nan Yang, Tianyu Gao, Tianyu Gao, Si Zhang, Haitao Shi, Haitao Shi, Yiqun Lu, Shuang Ren, Hongshi Huang, Hongshi Huang   +12 more
doaj   +1 more source

Stable Imitation of Multigait and Bipedal Motions for Quadrupedal Robots Over Uneven Terrains

Advanced Robotics Research, EarlyView.
How are quadrupedal robots empowered to execute complex navigation tasks, including multigait and bipedal motions? Challenges in stability and real‐world adaptation persist, especially with uneven terrains and disturbances. This article presents an imitation learning framework that enhances adaptability and robustness by incorporating long short‐term ...
Erdong Xiao, Yinzhao Dong, Ji Ma, Peng Lu   +3 more
wiley   +1 more source

Maize nodal root growth maintenance during water deficit: metabolic acclimation and the role of increased solute deposition in osmotic adjustment

Frontiers in Plant Science
Maize (Zea mays L.) nodal roots are characterized by their ability to maintain elongation under water deficit conditions that inhibit the growth of other organs.
Tyler J. McCubbin, Tyler J. McCubbin, Tyler J. McCubbin, Laura A. Greeley, Laura A. Greeley, Rachel A. Mertz, Rachel A. Mertz, Sidharth Sen, Sidharth Sen, Amelia E. Griffith, Amelia E. Griffith, Shannon K. King-Miller, Shannon K. King-Miller, Kara Riggs, Kara Riggs, Nicole D. Niehues, Nicole D. Niehues, Akanksha Pareek, Akanksha Pareek, Victoria J. Bryan, Shuai Zeng, Shuai Zeng, Cheyenne Becker, Cheyenne Becker, Abdul Ghani, Trupti Joshi, Trupti Joshi, Trupti Joshi, Trupti Joshi, Scott C. Peck, Scott C. Peck, Scott C. Peck, Melvin J. Oliver, Melvin J. Oliver, Felix B. Fritschi, Felix B. Fritschi, David M. Braun, David M. Braun, David M. Braun, Robert E. Sharp, Robert E. Sharp   +40 more
doaj   +1 more source

Information Transmission Strategies for Self‐Organized Robotic Aggregation

Advanced Robotics Research, EarlyView.
In this review, we discuss how information transmission influences the neighbor‐based self‐organized aggregation of swarm robots. We focus specifically on local interactions regarding information transfer and categorize previous studies based on the functions of the information exchanged.
Shu Leng, Zihan Li, Yifeng Shao, Jinhao Liu, Li Yu, Shuguang Li   +5 more
wiley   +1 more source

Analysis of the Kinematics and Workspace of a Tripod Parallel Robot

Jixie chuandong, 2018
By analyzing the structure of Tripod parallel robot,a single branch chain analysis model is established. The kinematics analysis of robot is carried out by means of geometric analysis,and the expression of inverse kinematics is obtained.
Sun Shuai, Song Gongfei, Huang Xiancun
doaj  

Hand Dynamics in Healthy Individuals and Spinal Cord Injury Patients During Real and Virtual Box and Block Test

Applied Sciences
Virtual reality (VR) is a promising tool in spinal cord injury (SCI) rehabilitation, particularly through virtual adaptations of functional tests like the Box and Block test (BBT).
Verónica Gracia-Ibáñez, Ana de los Reyes-Guzmán, Margarita Vergara, Néstor J. Jarque-Bou, Joaquín-Luis Sancho-Bru   +4 more
doaj   +1 more source