To help guide the development of multi-sensor machine vision systems for defect detection in lumber, a fundamental understanding of wood defects is needed. The purpose of this research was to advance the basic understanding of defects in lumber by describing them in terms of parameters that can be derived from color and x-ray scanning technologies and to demonstrate how these parameters can be ...

On the basis of a rigorous, nonperturbative, purely numerical solution of the corresponding reduced Rayleigh equation for the scattering amplitudes we have studied the scattering of a surface plasmon polariton by a two dimensional dielectric defect on a planar metal surface. The profile of the defect is assumed to be an arbitrary single-valued function of the coordinates in the plane of the met...

We study a totally asymmetric simple exclusion process (TASEP) with one defect site, hopping rate q < 1, near the system boundary. Regarding our system as a pair of uniform TASEP’s coupled through the defect, we study various methods to match a finite TASEP and an infinite one across a common boundary. Several approximation schemes are investigated. Utilizing the finite segment mean-field (FSMF...

We model and analyze a short section of a DNA chain with a defect, with the aim of understanding how the frequency, amplitude, and localization of breathing events depend on the strength of the bonds between base pairs, both along the chain and between the chains. Our results show that the presence of a defect in the chain permits the existence of a localized breather mode. The models we analyz...

We analyse base-pair breathing in a DNA sequence of 12 base-pairs with a defective base at its centre. We use both all-atom molecular dynamics (MD) simulations and a system of stochastic differential equations (SDE). In both cases, Fourier analysis of the trajectories reveals self-organised critical behaviour in the breathing of base-pairs. The Fourier Transforms (FT) of the interbase distances...

Microwave-induced changes in the optical emission of the NV center in diamond have previously been attributed to magnetic resonance of the defect in its A ground state [E. van Oort et al. , J. Phys. C 21, 4385 (1988)]. In this paper, the focus is on the origin of the hyperfine splittings that are observed in the optically detected magnetic-resonance (ODMR) spectra at zero and low magnetic field...

We have carried out a large number of studies using AOARD grant. We have acknowledged AOARD on all these publications related to the project, which is listed below. Here, we give abstract of all the works carried out under this grant. We have used first-principles density functional theory (DFT) calculations for a systematic study on the structural stability, electronic, magnetic and transport ...

The pair-defect-sum approximation to the bond strength of a hybrid orbital (angular wave functions only) is compared to the rigorous value as a function of bond angle for seven types of bonding situations, with between three and eight bond directions equivalent by geometrical symmetry operations and with only one independent bond angle. The approximation is seen to be an excellent one in all ca...

Hybrid functional calculations are presented for defects in LiGaO2 with the fraction of non-local exchange adjusted to reproduce recently reported exciton gap 6.0 eV. We study how defect transition levels main native change respect band edges compared earlier which assumed a smaller bandgap near 5.1 In addition, we consider complexes formed by combining donor GaLi acceptors, VLi and LiGa antisi...

congenital left ventricular diverticulum is a rare cardiac malformation. two categories of congenital ventricular diverticulum have been identified with regard to their localization: apical and non-apical. apical diverticula are always associated with midline thoraco-abdominal defects and other heart malformations. non-apical diverticula are always isolated defects. diagnosis is established by ...