Results 261 to 270 of about 174,012 (313)
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Journal of Mathematical Physics, 1968
The kinematical groups are classified; they include, besides space-time translations and spatial rotations, ``inertial transformations'' connecting different inertial frames of reference. When parity and time-reversal are required to be automorphisms of the groups, and when a weak hypothesis on causality is made, the only possible groups are found to ...
Bacry, Henri, Lévy-Leblond, Jean-Marc
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The kinematical groups are classified; they include, besides space-time translations and spatial rotations, ``inertial transformations'' connecting different inertial frames of reference. When parity and time-reversal are required to be automorphisms of the groups, and when a weak hypothesis on causality is made, the only possible groups are found to ...
Bacry, Henri, Lévy-Leblond, Jean-Marc
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Hand Clinics, 2006
The motion of the eight carpal bones is extremely complex, and their accurate measurement has been hampered by their multiplanar rotations and translations, the irregularity of their shape, and the small magnitudes of movements. However, an accurate three-dimensional understanding of carpal motion is critical for academic and clinical purposes, and may
Michael J, Gardner +2 more
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The motion of the eight carpal bones is extremely complex, and their accurate measurement has been hampered by their multiplanar rotations and translations, the irregularity of their shape, and the small magnitudes of movements. However, an accurate three-dimensional understanding of carpal motion is critical for academic and clinical purposes, and may
Michael J, Gardner +2 more
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Proceedings 2000 ICRA. Millennium Conference. IEEE International Conference on Robotics and Automation. Symposia Proceedings (Cat. No.00CH37065), 2002
A trend of thought in the robotics community is that most problems in kinematics have been solved and that this domain is slowly dying. The purpose of the paper is to show that there are still many unsolved problems in this field and that research on this topic may have a large influence in many different domains.
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A trend of thought in the robotics community is that most problems in kinematics have been solved and that this domain is slowly dying. The purpose of the paper is to show that there are still many unsolved problems in this field and that research on this topic may have a large influence in many different domains.
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Kinematics and diferential kinematics of binocular robot heads
Proceedings 2006 IEEE International Conference on Robotics and Automation, 2006. ICRA 2006., 2006This paper presents an analysis of the kinematics of a binocular head, and a new formulation of its differential kinematics using the conformal geometric algebra framework.
Julio Zamora-Esquivel +1 more
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Journal of the Optical Society of America, 1957
A mathematical discussion is presented of eye positions and eye movements in terms of quaternion theory. An eye movement may be regarded as a rotation of the eye about an axis through the center of rotation. The parameters of the axis of rotation and the extent of the rotation are associated to form a higher complex number, and this leads to the ...
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A mathematical discussion is presented of eye positions and eye movements in terms of quaternion theory. An eye movement may be regarded as a rotation of the eye about an axis through the center of rotation. The parameters of the axis of rotation and the extent of the rotation are associated to form a higher complex number, and this leads to the ...
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The Mathematical Gazette, 1952
Historical . That the problems of plane kinematics should have been studied for a long period is natural; they present themselves quite easily, and in simple fashion. At the end of the seventeenth century, and the beginning of the eighteenth century, De La Hire investigated roulettes, and to him also is due the ...
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Historical . That the problems of plane kinematics should have been studied for a long period is natural; they present themselves quite easily, and in simple fashion. At the end of the seventeenth century, and the beginning of the eighteenth century, De La Hire investigated roulettes, and to him also is due the ...
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Kinematics of parallel kinematic machine Exechon
2009 International Conference on Information and Automation, 2009Due to the potential advantages of heavy load, high speed, and high precision, hundreds of parallel kinematic machines have been proposed. However, only a few of them have been practically applied, and one of the recently-developed parallel kinematic machines is the Exechon machine tool.
Z. M. Bi, Y. Jin, R. Gibson, P. McTotal
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Compensation of kinematic errors using kinematic sensitivities
Proceedings, 1989 International Conference on Robotics and Automation, 2003Two approaches for the compensation of the position and orientation errors of robot manipulators due to variations of geometric parameters are considered. The first approach is based on the correction of the joint displacements obtained by using nominal inverse kinematics for desired position and orientation, while the second approach is based on ...
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2009
In this chapter, we continue the study of kinematics by considering in more detail the motion of fluid parcels, by deriving expressions for the areal, volumetric, and mass flow rates across lines and surfaces drawn in a fluid, and by developing numerical methods for evaluating kinematic variables of interest in terms of derivatives and integrals of the
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In this chapter, we continue the study of kinematics by considering in more detail the motion of fluid parcels, by deriving expressions for the areal, volumetric, and mass flow rates across lines and surfaces drawn in a fluid, and by developing numerical methods for evaluating kinematic variables of interest in terms of derivatives and integrals of the
openaire +1 more source