Zobrazeno 1 - 10
of 142
pro vyhledávání: '"Skinner, Thomas E."'
Autor:
Skinner, Thomas E.
The Bloch equation is the fundamental dynamical model applicable to arbitrary two-level systems. Analytical solutions to date are incomplete for a number of reasons that motivate further investigation. The solution obtained here for the propagator, w
Externí odkaz:
http://arxiv.org/abs/1704.00826
Autor:
Skinner, Thomas E.
Publikováno v:
J. Magn. Reson. 248 (2014) 146-152
An exact general theory of heteronuclear decoupling is presented for spin-1/2 IS systems. RF irradiation applied to the I spins decouples the S spins by reversing the sign of antiphase magnetization. A one-to-one correspondence is demonstrated betwee
Externí odkaz:
http://arxiv.org/abs/1403.6447
We apply our theory of conservative solute transport, based on concepts from percolation theory, directly and without modification to reactive solute transport. This theory has previously been shown to predict the observed range of dispersivity value
Externí odkaz:
http://arxiv.org/abs/1309.2993
Autor:
Skinner, Thomas E.
Publikováno v:
Phys. Rev. A 88, 012110 (2013)
The dynamics of states representing arbitrary N-level quantum systems, including dissipative systems, can be modelled exactly by the dynamics of classical coupled oscillators. There is a direct one-to-one correspondence between the quantum states and
Externí odkaz:
http://arxiv.org/abs/1302.0754
Publikováno v:
Phys. Rev. E 86 (2012) 066316
In this study, we develop a saturation-dependent treatment of dispersion in porous media using concepts from critical path analysis, cluster statistics of percolation, and fractal scaling of percolation clusters. We calculate spatial solute distribut
Externí odkaz:
http://arxiv.org/abs/1210.4581
Autor:
Nimbalkar, Manoj, Luy, Burkhard, Skinner, Thomas E., Neves, Jorge L., Gershenzon, Naum I., Kobzar, Kyryl, Bermel, Wolfgang, Glaser, Steffen J.
We present highly robust, optimal control-based shaped pulses designed to replace all 90{\deg} and 180{\deg} hard pulses in a given pulse sequence for improved performance. Special attention was devoted to ensuring that the pulses can be simply subst
Externí odkaz:
http://arxiv.org/abs/1209.0134
Publikováno v:
J. Magn. Reson. 217 (2012) 53-60
Existing optimal control protocols for mitigating the effects of relaxation and/or RF inhomogeneity on broadband pulse performance are extended to the more difficult problem of designing robust, refocused, frequency selective excitation pulses. For t
Externí odkaz:
http://arxiv.org/abs/1111.6650
Autor:
Skinner, Thomas E., Gershenzon, Naum I., Nimbalkar, Manoj, Bermel, Wolfgang, Luy, Burkhard, Glaser, Steffen J.
Publikováno v:
J. Magn. Reson. 216 (2012) 78-87
Broadband inversion pulses that rotate all magnetization components 180 degrees about a given fixed axis are necessary for refocusing and mixing in high-resolution NMR spectroscopy. The relative merits of various methodologies for generating pulses s
Externí odkaz:
http://arxiv.org/abs/1111.6647
Publikováno v:
J. Magn. Reson. 209 (2011) 282-290
We present robust radio frequency (rf) pulses that tolerate a factor of six inhomogeneity in the B1 field, significantly enhancing the potential of toroid cavity resonators for NMR spectroscopic applications. Both point-to-point (PP) and unitary rota
Externí odkaz:
http://arxiv.org/abs/1011.6258
Autor:
Nimbalkar, Manoj, Luy, Burkhard, Skinner, Thomas E., Neves, Jorge L., Gershenzon, Naum I., Kobzar, Kyryl, Bermel, Wolfgang, Glaser, Steffen J.
Publikováno v:
In Journal of Magnetic Resonance March 2013 228:16-31