Browsing School of Engineering, Computing and Mathematics by Issue Date
Now showing items 41-60 of 1534
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Status of ETMC simulations with Nf=2+1+1 twisted mass fermions
(2008-10-21)We present the status of runs performed in the twisted mass formalism with $N_{\rm f}=2+1+1$ flavours of dynamical fermions: a degenerate light doublet and a mass split heavy doublet. The procedure for tuning to maximal ... -
Ice-limit of Coulomb gauge Yang-Mills theory
(2008-10-27)In this paper we describe gauge invariant multi-quark states generalising the path integral framework developed by Parrinello, Jona-Lasinio and Zwanziger to amend the Faddeev-Popov approach. This allows us to produce ... -
Nucleon form factors with dynamical twisted mass fermions
(2008-11-05)The electromagnetic and axial form factors of the nucleon are evaluated in twisted mass QCD with two degenerate flavors of light, dynamical quarks. The axial charge g_A, magnetic moment and the Dirac and Pauli radii are ... -
Solution of the Gribov problem from gauge invariance
(2008-12-01)A new approach to gauge fixed Yang-Mills theory is derived using the Polyakov-Susskind projection techniques to build gauge invariant states. In our approach, in contrast to the Faddeev-Popov method, the Gribov problem ... -
Design, manufacture, mechanical testing and numerical modelling of an asymmetric composite crossbow limb
(ELSEVIER SCI LTD, 2009-04)This paper considers the design, manufacture, mechanical testing and numerical analysis of a crossbow beam (limb). The limb should be lightweight and permit a high deflection of the beam's tip in order to achieve a good ... -
Partially quenched study of strange baryon with Nf = 2 twisted mass fermions
(2009-05-18)We present results on the mass of the baryon octet and decuplet using two flavors of light dynamical twisted mass fermions. The strange quark mass is fixed to its physical value from the kaon sector in a partially quenched ... -
Felix - A Simulation-Tool for Neural Networks (and Dynamical Systems). User Guide.
(2009-06-01)User Guide for the Felix Simulation Tool -
A modular planar robotic manipulandum with end-point torque control.
(Netherlands, 2009-07-30)Robotic manipulanda are extensively used in investigation of the motor control of human arm movements. They permit the application of translational forces to the arm based on its state and can be used to probe issues ... -
The low-lying baryon spectrum with two dynamical twisted mass fermions
(2009-10-13)The masses of the low lying baryons are evaluated using two degenerate flavors of twisted mass sea quarks corresponding to pseudo scalar masses in the range of about 270-500 MeV. The strange valence quark mass is tuned ... -
Physical charges in QED and QCD
(2009-10-28)We show that the `dressing' approach, which describes physical charges as gauge invariant composites of matter and clouds of gauge bosons, arises naturally in gauge theories. We give perturbative examples of dressings for ... -
KLAIR: A virtual infant for spoken language acquisition research
(2009-11-26)Recent research into the acquisition of spoken language has stressed the importance of learning through embodied linguistic interaction with caregivers rather than through passive observation. However the necessity of ... -
First results of ETMC simulations with Nf=2+1+1 maximally twisted mass fermions
(2009-11-27)We present first results from runs performed with Nf=2+1+1 flavours of dynamical twisted mass fermions at maximal twist: a degenerate light doublet and a mass split heavy doublet. An overview of the input parameters and ... -
Grounding Action Words in the Sensorimotor Interaction with the World: Experiments with a Simulated iCub Humanoid Robot.
(Switzerland, 2010-01-01)This paper presents a cognitive robotics model for the study of the embodied representation of action words. The present research will present how an iCub humanoid robot can learn the meaning of action words (i.e. words ...
