Results 101 to 110 of about 843,344 (369)

Space Velocities of Southern Globular Clusters. IV. First Results for Inner-Galaxy Clusters

open access: yes, 2002
We have measured the absolute proper motions of four low-latitude, inner-Galaxy globular clusters. These clusters are: NGC 6266 (M62), NGC 6304, NGC 6316 and NGC 6723. The proper motions are on the Hipparcos system, as no background extragalactic objects
Barbuy B.   +9 more
core   +1 more source

DIRECT AND INVERSE KINEMATICS TO THE ANTHROPOMORPHIC ROBOTS

open access: yes, 2016
: The paper presents an original geometrical and kinematic method for the study of geometry and determining positions of a MP-3R structure. It presents shortly the MP-3R direct and inverse kinematics, the inverse kinematics being solved by an original ...
F. Petrescu, R. Petrescu
semanticscholar   +1 more source

Analysis and Experimental Kinematics of a Skid-Steering Wheeled Robot Based on a Laser Scanner Sensor

open access: yesItalian National Conference on Sensors, 2015
Skid-steering mobile robots are widely used because of their simple mechanism and robustness. However, due to the complex wheel-ground interactions and the kinematic constraints, it is a challenge to understand the kinematics and dynamics of such a ...
Tianmiao Wang   +5 more
semanticscholar   +1 more source

Biomechanical and Displacement‐Related Considerations in the Design of a 3D‐Printed Composite Energy‐Storage‐and‐Return Prosthetic Foot

open access: yesAdvanced Materials Technologies, EarlyView.
For the first time, Continuous Fiber‐Reinforced 3D printing is used to fabricate a foot prosthesis, exploring the flexibility in the design space granted by additive manufacturing, evaluating computationally and experimentally the effect of different design features on the mechanical and biomechanical response of the material, to locally tune the ...
Jacopo Romanò   +10 more
wiley   +1 more source

钢带并联机器人运动学模型与数值模拟

open access: yesJixie chuandong, 2014
Aiming at complex calculation of forward kinematics of steel band parallel robot,the kinematics model and solution of steel band parallel robot is discussed.The existing kinematics analysis methods are introduced.The working principle of steel band ...
艾青林, 舒剑, 祖顺江
doaj  

Non-Relativistic Spacetimes with Cosmological Constant

open access: yes, 1999
Recent data on supernovae favor high values of the cosmological constant. Spacetimes with a cosmological constant have non-relativistic kinematics quite different from Galilean kinematics.
A L Barbosa   +18 more
core   +2 more sources

Strain Amplification via Helically Braided Fiber Reinforced Sleeve for Soft Material Energy Harvesting

open access: yesAdvanced Materials Technologies, EarlyView.
This study presents a braided fiber‐reinforced sleeve that amplifies strain in soft materials, enhancing their performance in stretchable devices like sensors and energy harvesters. By reinforcing and elongating encased materials, the sleeve increases the “effective” strain.
Emily Duan   +4 more
wiley   +1 more source

How to Manufacture Photonic Metamaterials

open access: yesAdvanced Materials Technologies, EarlyView.
Metamaterials boast applications such as invisibility and “hyperlenses” with resolution beyond the diffraction limit, but these applications haven’t been exploited in earnest and the market for them hasn’t grown much likely because facile and economical methods for fabricating them without defect has not emerged.
Apurba Paul, Gregory Timp
wiley   +1 more source

Kinematics Modeling and Analysis of Manipulator based on Dual Quaternion

open access: yesJixie chuandong, 2018
To simplify the kinematics expression and to increase the motion response speed for manipulators,a kinematics modeling method is proposed based on dual quaternion. First,to reduce the computational amount,the general equation of the forward kinematics of
葛为民   +3 more
doaj  

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