166 research outputs found
Blockage detection in networks : The area reconstruction method
In this note we present a reconstructive algorithm for solving the cross-sectional pipe area from boundary measurements in a tree network with one inaccessible end. This is equivalent to reconstructing the first order perturbation to a wave equation on a quantum graph from boundary measurements at all network ends except one. The method presented here is based on a time reversal boundary control method originally presented by Sondhi and Gopinath for one dimensional problems and later by Oksanen to higher dimensional manifolds. The algorithm is local, so is applicable to complicated networks if we are interested only in a part isomorphic to a tree. Moreover the numerical implementation requires only one matrix inversion or least squares minimization per discretization point in the physical network. We present a theoretical solution existence proof, a step-by-step algorithm, and a numerical implementation applied to two numerical experiments.Peer reviewe
Comparison of the Fermi-surface topologies of kappa-(BEDT-TTF)_2 Cu(NCS)_2 and its deuterated analogue
We have measured details of the quasi one-dimensional Fermi-surface sections
in the organic superconductor kappa-(BEDT-TTF)_2 Cu(NCS)_2 and its deuterated
analogue using angle-dependent millimetre-wave techniques. There are
significant differences in the corrugations of the Fermi surfaces in the
deuterated and undeuterated salts. We suggest that this is important in
understanding the inverse isotope effect, where the superconducting transition
temperature rises on deuteration. The data support models for superconductivity
which invoke electron-electron interactions depending on the topological
properties of the Fermi surface
Permanent improved high-quality draft genome sequence of Nocardia casuarinae strain BMG51109, an endophyte ofactinorhizal root nodules of Casuarina glauca
Here, we report the first genome sequence of aNocardiaplant endophyte, N. casuarinaestrain BMG51109, isolated fromCasu-arina glaucaroot nodules. The improved high-quality draft genome sequence contains 8,787,999 bp with a 68.90% GC contentand 7,307 predicted protein-coding genes
Permanent draft genome sequence of Nocardia sp. BMG111209, an actinobacterium isolated from nodules of Casuarina glauca
Nocardia sp. strain BMG111209 is a non-Frankia actinobacterium isolated from root nodules of Casuarina glauca in Tunisia. Here, we report the 9.1-Mbp draft genome sequence of Nocardia sp. strain BMG111209 with a G + C content of 69.19% and 8,122 candidate protein-encoding genes
Real space imaging of the metal - insulator phase separation in the band width controlled organic Mott system -(BEDT-TTF)Cu[N(CN)]Br
Systematic investigation of the electronic phase separation on macroscopic
scale is reported in the organic Mott system
-(BEDT-TTF)Cu[N(CN)]Br. Real space imaging of the phase
separation is obtained by means of scanning micro-region infrared spectroscopy
using the synchrotron radiation. The phase separation appears near the Mott
boundary and changes its metal-insulator fraction with the substitution ratio
in
-[(-BEDT-TTF)(-BEDT-TTF)]Cu[N(CN)]Br,
of which band width is controlled by the substitution ratio between the
hydrogenated BEDT-TTF molecule (-BEDT-TTF) and the deuterated one
(-BEDT-TTF). The phase separation phenomenon observed in this class of
organics is considered on the basis of the strongly correlated electronic phase
diagram with the first order Mott transition.Comment: 10 pages, 8 figure
Pairing Symmetry Competition in Organic Superconductors
A review is given on theoretical studies concerning the pairing symmetry in
organic superconductors. In particular, we focus on (TMTSF)X and
-(BEDT-TTF)X, in which the pairing symmetry has been extensively
studied both experimentally and theoretically. Possibilities of various pairing
symmetry candidates and their possible microscopic origin are discussed. Also
some tests for determining the actual pairing symmtery are surveyed.Comment: 16 pages, 8 figures, to be published in J. Phys. Soc. Jpn., special
issue on "Organic Conductors
- …