Results 31 to 40 of about 79,822 (189)

An Efficient and Accurate Inverse Kinematics for 7-DOF Redundant Manipulators Based on a Hybrid of Analytical and Numerical Method

IEEE Access, 2020
This paper proposes an efficient and accuracy inverse kinematic algorithm for 7-DOF redundant manipulators with obstacles avoidance and singularities avoidance based on the hybrid of analytical and numerical method (IK-HAN).
Minghe Jin, Qiang Liu, Bin Wang, Hong Liu   +3 more
doaj   +1 more source

Formulation of Shell Elements Based on the Motion Formalism

Applied Mechanics, 2021
This paper presents a finite element implementation of plates and shells for the analysis of flexible multibody systems. The developments are set within the framework of the motion formalism that (1) uses configuration and motion to describe the ...
Olivier Bauchau, Valentin Sonneville
doaj   +1 more source

Codimension-3 Singularities and Yukawa Couplings in F-theory [PDF]

, 2009
F-theory is one of the frameworks where all the Yukawa couplings of grand unified theories are generated and their computation is possible. The Yukawa couplings of charged matter multiplets are supposed to be generated around codimension-3 singularity ...
Andreas, Beasley, Beasley, Beauville, Berglund, Bershadsky, Bershadsky, Blumenhagen, Blumenhagen, Blumenhagen, Bourjaily, Buican, Conlon, Curio, Curio, Diaconescu, Donagi, Donagi, Donagi, Donagi, Donagi, Donagi, Donagi, Donagi, Donaldson, Font, Friedman, Gaberdiel, Hall, Hall, Hall, Hayashi, Heckman, Heckman, Heckman, Heckman, Heckman, Hirotaka Hayashi, Hitchin, Hitchin, Jiang, Katz, Katz, Katz, Katz, Marsano, Marsano, Morrison, Morrison, Narasimhan, Radu Tatar, Rajesh, Sen, Taizan Watari, Tatar, Tatar, Teruhiko Kawano, Uhlenbeck, Uhlenbeck, Vafa, Watari, Wess, Wijnholt, Wright, Wright   +64 more
core   +1 more source

Singularity Analysis and Complete Methods to Compute the Inverse Kinematics for a 6-DOF UR/TM-Type Robot

Robotics, 2022
Improving the strategies employed to control robotic arms is of great importance because of the increase in their use in advanced supervisory control strategies, such as digital twins.
Jessica Villalobos, Irma Y. Sanchez, Fernando Martell   +2 more
doaj   +1 more source

Stationary non-axisymmetric configurations of magnetized singular isothermal discs [PDF]

Monthly Notices of the Royal Astronomical Society, 2002
We construct both aligned and unaligned (logarithmic spiral) stationary configurations of nonaxisymmetric magnetohydrodynamic (MHD) disks from either a full or a partial razor-thin power-law axisymmetric magnetized singular isothermal disk (MSID) that is embedded with a coplanar azimuthal magnetic field $B_ $ of a non-force-free radial scaling $r^{-1 ...
openaire   +2 more sources

Nonlinear Quantum Optics With Structured Light: Tightly Trapped Atoms in the 3D Focus of Vectorial Waves

Frontiers in Physics, 2022
Atomic gases tightly trapped near the focus of an electromagnetic wave interact with photons that exhibit a complex structure, displaying strong gradients of field amplitude and local polarization that can lead to topological phase singularities.
R. Gutiérrez-Jáuregui, R. Jáuregui
doaj   +1 more source

Do sewn singularities falsify the Palatini cosmology? [PDF]

, 2016
We investigate further (cf. arXiv:1512.01199, JCAP01 (2016) 040) Starobinsky cosmological model $R+\gamma R^2$ in the Palatini formalism with Chaplygin gas and baryonic matter as a source. For this aim we use dynamical system theory.
Borowiec, Andrzej, Stachowski, Aleksander, Szydlowski, Marek, Wojnar, Aneta   +3 more
core   +2 more sources

Configuring Polarization Singularity Array Composed of C-Point Pairs

IEEE Photonics Journal, 2022
The generation and topological configuration of double-layered polarization singularity array (PSA) having paired C-points of opposite topological index through superposing three Laguerre-Gaussian (LG) component beams with orthogonal linear polarization ...
Xinglin Wang, Zhiyi Li, Yuan Gao, Zheng Yuan, Wenxiang Yan, Zhi-Cheng Ren, Xi-Lin Wang, Jianping Ding, Hui-Tian Wang   +8 more
doaj   +1 more source

Regular S-Brane Backgrounds [PDF]

, 2004
We construct time-dependent S-brane solutions to the supergravity field equations in various dimensions which (unlike most such geometries) do not contain curvature singularities.
A. Buchel, A. Maloney, A. Sen, A. Sen, A. Sen, B. Fiol, C. Grojean, C.-M. Chen, C.-M. Chen, C.P Burgess, C.P. Burgess, C.P. Burgess, C.P. Burgess, D. Brecher, D.L. Wiltshire, F Quevedo, F. Leblond, F. Quevedo, G Tasinato, G. Jones, G.W. Gibbons, H. Lu, H. Lu, H. Lu, I Zavala, I.P. Neupane, J.E. Wang, J.E. Wang, J.M. Maldacena, L. Cornalba, L. Dyson, L. Maoz, M. Gutperle, M. Gutperle, M. Kruczenski, N. Ohta, N.S. Deger, N.S. Deger, R. Emparan, R.C. Myers, S. Bhattacharya, S. Hawking, S. Mahapatra, S. Roy, S.W. Hawking, V.D. Ivashchuk   +45 more
core   +3 more sources

Semiclassical initial value calculations of collinear helium atom

, 2007
Semiclassical calculations using the Herman-Kluk initial value treatment are performed to determine energy eigenvalues of bound and resonance states of the collinear helium atom.
C. Harabati, K. G. Kay, Kustaanheimo P., Press W. H., Rost J.-M., Wintgen D.   +5 more
core   +1 more source