We present time-resolved methods that rely on near-infrared photons to image the optical properties and distribution of fluorescent probes in small laboratory animals. The scanner assembled in our laboratory is described. The coupled diffusion equations of excitation and fluorescence photons in highly scattering tissues were solved using the three-dimensional Finite Element Method (FEM) provide...

Abstract Modeling of nano-structured plasmonic surfaces in optical range has attracted great attention recent research for its various properties such as filtering and enhanced transmission light. In this paper, we present a simple nanocircuit model that can be integrated CAD tools to design filters perfect absorbers FSS devices are based on through thin films structured by hole arrays. To illu...

Coupling fuel performance and neutronics can help improve the prediction accuracy of rod behavior, which is important for design evaluation. A multiphysics coupled system was developed with software COMSOL 3D Monte Carlo neutron transport code RMC. The analysis module built on top ability to simulate behavior in two-dimensional axisymmetric (2D-RZ) or three-dimensional (3D) mode. RMC innovative...

In a direct detection receiver, incoming optical light wave electric field Er at receiver input is directly converted to an electrical current using a PIN-photodiode. When Er is weak, then an avalanche photodiode is used. So, the question is what do these diodes do and why/when is one preferred over the other. (Please refer to block diagram Fig 9.1(a)) To provide a brief introduction, photodiod...

Tumor vascular patterns of advanced breast cancers are complex and heterogeneous. Near infrared (NIR) optical tomography has great potential to image tumor vascular and hypoxia patterns. The simulation of NIR diffusion in turbid tissue is indispensable to accelerate the practice in clinic. In this article, the two popular simulation methods, Finite element (FEM) and Monte Carlo (MC), are compar...

In order to implement an integrated optical quantum circuit, designing waveguides based on the quantum box is of prime importance. To do this we have investigated optical waveguide both with and without optical pumping. The rate of absorption and emission using an array of AlGaAs/GaAs quantum box core/shell structure in the optical waveguide with various pumping intensities has computed. By con...

We show that a mechanical model of a pin-jointed linked structure is exactly equivalent to a symplectic Euler discretisation of a Hamiltonian ODE system. The step-size of this discretisation relates to a mechanical quantity which can take arbitrary values. Thus we may explore the behaviour of the symplectic Euler method in regions not normally considered appropriate for a numerical scheme and i...

An efficient simulation technique was proposed to examine the thermal-fluid structure interaction in the effects of solder temperature on pin through-hole during wave soldering. This study investigated the capillary flow behavior as well as the displacement, temperature distribution, and von Mises stress of a pin passed through a solder material. A single pin through-hole connector mounted on a...

in this paper, a new design of optical channel drop filter based on two- dimensional photonic crystal ring resonators with triangular lattice is proposed. the rods of this structure is silicon with the refractive index nsi=3.46 and the surrounding environment is air with the refractive index of nair=1.the widest photonic band gap obtains for the filling ratio of r/a = 0.2. the filter’s transmis...

Dissimilar joint with good quality and mechanical properties is one of the major problems the industries. One of the most commonly used methods to solve this problem is friction stir welding process. In this paper two different tool pin with simple cylindrical and screwed profile were used to finding optimization of friction stir welding parameters to reach best mixing flow, composite structure...