Irradiated material is a typical example of a complex system with nonlinear coupling between its elements. During irradiation the radiation damage is developed and this development has bifurcations and qualitatively different kinds of behavior. The accumulation of primary defects in irradiated crystals is considered in frame work of nonlinear evolution of complex system. The thermo-concentratio...

Previous computer simulations of multiple 10 keV Si cascades in 3C–SiC demonstrated that many damage-state properties exhibit relatively smooth, but noticeably different, dose dependencies. A more recent analysis of these damage-state properties, which includes additional data at low and intermediate doses, reveals more complex relationships between system energy, swelling, energy per defect, r...

The scanning tunneling microscope is used to study arsenic-related point defects in low-temperaturegrown GaAs. Tunneling spectroscopy reveals a band of donor states located near E„+0. 5 eV arising from the defects. Images of this state reveal a central defect core, with two satellites located about 15 A from the core. The structure of the defect is found to be consistent with that of an isolate...

by employing the theoretical method based on tight-binding, we study electronic band structure of single-wall carbon nanotube (cnt) superlattices, which the system is the made of the junction between the zigzag and armchair carbon nanotubes. exactly at the place of connection, it is appeared the pentagon–heptagon pairs as topological defect in carbon hexagonal network. the calculations are base...

background: there is some evidence indicating improvement in myocardial performance after atrial septal defect closure, either device closure or surgical, but ventricular dyssynchrony has not been evaluated before and after surgical closure. the aim of this study was to evaluate ventricular mechanical dyssynchrony in patients with atrial septal defect before and after surgical closure. methods:...

We study the dynamics of 2D gap solitons (GSs) in Bragg resonant nonlinear (photonic) gratings in the presence of localized defects. Previous work [Stud. Appl. Math.115, 209 (2005)] explains the mechanism of trapping the GS-carried energy at a defect via a resonant energy transfer from the GS into defect modes. We derive a finite-dimensional model that describes the evolution of the defect-trap...

We studied the maintenance process from the viewpoint of defect management and the defect life cycle. First, we outline a model for the defect life cycle based on ISO/IEC standards, the Framework for Open Source maintenance process, and the Bugzilla defect management system. Thereafter, we analyze defects from two Open Source software projects. The aim of the study was support the maintenance r...

Given two two-dimensional conformal field theories, a domain wall – or defect line – between them is called invertible if there is another defect with which it fuses to the identity defect. A defect is called topological if it is transparent to the stress tensor. A conformal isomorphism between the two CFTs is a linear isomorphism between their state spaces which preserves the stress tensor and...