16,203 research outputs found
Parallel algorithms for computation of the manipulator inertia matrix
The development of an O(log2N) parallel algorithm for the manipulator inertia matrix is presented. It is based on the most efficient serial algorithm which uses the composite rigid body method. Recursive doubling is used to reformulate the linear recurrence equations which are required to compute the diagonal elements of the matrix. It results in O(log2N) levels of computation. Computation of the off-diagonal elements involves N linear recurrences of varying-size and a new method, which avoids redundant computation of position and orientation transforms for the manipulator, is developed. The O(log2N) algorithm is presented in both equation and graphic forms which clearly show the parallelism inherent in the algorithm
P-Wave Holographic Insulator/Superconductor Phase Transition
Using a five dimensional AdS soliton in an Einstein-Yang-Mills theory with
SU(2) gauge group we study p-wave holographic insulator/superconductor phase
transition. To explore the phase structure of the model we consider the system
in the probe limit as well as fully back reacted solutions. We will also study
zero temperature limit of the p-wave holographic superconductor in four
dimensions.Comment: Latex,18 pages,7 figures, v2: Typos correction, v3: minor changes
added, and clarifications mad
Theory of the inverse spin galvanic effect in quantum wells
The understanding of the fundamentals of spin and charge densities and
currents interconversion by spin-orbit coupling can enable efficient
applications beyond the possibilities offered by conventional electronics. For
this purpose we consider various forms of the frequency-dependent inverse spin
galvanic effect (ISGE) in semiconductor quantum wells and epilayers taking into
account the cubic in the electron momentum spin-orbit coupling in the Rashba
and Dresselhaus forms, concentrating on the current-induced spin polarization
(CISP). We find that including the cubic terms qualitatively explains recent
findings of the CISP in InGaAs epilayers being the strongest if the internal
spin-orbit coupling field is the smallest and vice versa (Norman et . 2014,
Luengo et al. 2017), in contrast to the common understanding. Our results
provide a promising framework for the control of spin transport in future
spintronics devices.Comment: 13 pages, 12 figure
Exploring Deep Learning Techniques for Glaucoma Detection: A Comprehensive Review
Glaucoma is one of the primary causes of vision loss around the world,
necessitating accurate and efficient detection methods. Traditional manual
detection approaches have limitations in terms of cost, time, and subjectivity.
Recent developments in deep learning approaches demonstrate potential in
automating glaucoma detection by detecting relevant features from retinal
fundus images. This article provides a comprehensive overview of cutting-edge
deep learning methods used for the segmentation, classification, and detection
of glaucoma. By analyzing recent studies, the effectiveness and limitations of
these techniques are evaluated, key findings are highlighted, and potential
areas for further research are identified. The use of deep learning algorithms
may significantly improve the efficacy, usefulness, and accuracy of glaucoma
detection. The findings from this research contribute to the ongoing
advancements in automated glaucoma detection and have implications for
improving patient outcomes and reducing the global burden of glaucoma
Nilai-nilai Dakwah dalam Film Sang Pencerah
Religious movies have been largely produced nowadays. One of them is Sang Pencerah, a movie directed by Hanung Bramantyo and sponsored by one of the largest religious organization in Indonesia, Muhammadiyah. This is a biography movie from its founder, KH. Ahmad Dahlan. Since it describes about a religious leaders and his central role in establishing Muhammadiyah, we can find many experiences and facts from Dahlan during his proselytizing. Muhammadiyah is known as a proselytizing organization, with the main principles of amar makruf nahi munkar (call for goodness and forbidden disavowal). This article presents the proselytizing dimensions by Dahlan as seen in the movie
Quantum Field Theory of Forward Rates with Stochastic Volatility
In a recent formulation of a quantum field theory of forward rates, the
volatility of the forward rates was taken to be deterministic. The field theory
of the forward rates is generalized to the case of stochastic volatility. Two
cases are analyzed, firstly when volatility is taken to be a function of the
forward rates, and secondly when volatility is taken to be an independent
quantum field. Since volatiltiy is a positive valued quantum field, the full
theory turns out to be an interacting nonlinear quantum field theory in two
dimensions. The state space and Hamiltonian for the interacting theory are
obtained, and shown to have a nontrivial structure due to the manifold moving
with a constant velocity. The no arbitrage condition is reformulated in terms
of the Hamiltonian of the system, and then exactly solved for the nonlinear
interacting case.Comment: 7 Figure
A mechanical behavior law for the numerical simulation of the mushy zone in welding
The aim of this work is to propose a mechanical behavior law dedicated to the mushy zone located between the solid phase and the weld pool in welding. The objective is to take into account of the influence of the mushy zone in the simulation of welding in order to improve the computation of induced effects such as residual stresses
- …