Performance Assessment of Graded Channel Gate-Stack based Double Gate MOSFET for Bio-sensing Applications

Silicon - In this paper, the performance of the Asymmetric Gate Graded Channel Gate-Stack Double Gate (AG-GCGS-DG) MOSFET-based biosensor has been investigated for dielectric-modulated (DM)...     

Optimal array factor radiation pattern synthesis for linear antenna array using cat swarm optimization: validation by an electromagnetic simulator

In this paper, an optimal design of linear antenna arrays having microstrip patch antenna elements has been carried out. Cat swarm optimization (CSO) has been applied for the optimization of the control parameters of radiation pattern of an antenna array. The optimal radiation patterns of isotropic antenna elements are obtained by optimizing the current excitation weight of each element and the inter-element spacing. The antenna arrays of 12, 16, and 20 elements are taken as examples. The arrays are designed by using MATLAB computation and are validated through Computer Simulation Technology-Microwave Studio (CST-MWS). From the simulation results it is evident that CSO is able to yield the optimal design of linear antenna arrays of patch antenna elements.     

Direct hydrothermal synthesis of B-SSZ-31 from silica and sodium borate using 1,3,3,6,6-pentamethyl-6-azoniabicyclo[3.2.1]octane hydroxide as structure-directing agent

The direct synthesis of a borosilicate version of SSZ-31 was investigated starting from fumed silica and sodium borate as the silicon and boron source, respectively. As-synthesized boron Beta as a seed material was required for synthesizing fully crystalline material. The synthesis vessel has been observed to play a major role during the synthesis. Synthesis inside quartz tubes succeeded whereas that inside a teflon-lined stainless steel autoclave failed. Crystalline material was obtained inside the autoclave in presence of hollow quartz tubes. Part of the tetrahedral boron could be substituted by aluminum refluxing the as-calcined sample with aluminum nitrate solution. This revised version was published online in July 2006 with corrections to the Cover Date.     

Reliability analysis of 500 MWe PHWR inner containment using high-dimensional model representation

In this paper, uncertainty analysis of Indian 500 MWe Pressurized Heavy Water Reactor (PHWR) subjected to an accidental pressure is carried out using a computational tool based on High Dimensional Model Representation (HDMR) that facilitates lower dimensional approximation of the original high dimensional implicit limit state/performance function. The method involves response surface generation of HDMR component functions, and Monte Carlo simulation. HDMR is a general set of quantitative model assessment and analysis tools for capturing the high-dimensional relationships between sets of input and output model variables. It is very efficient formulation of the system response, if higher-order variable correlations are weak, allowing the physical model to be captured by first few lower-order terms. Once the approximate form of the original implicit limit state/performance function is defined, the failure probability can be obtained by statistical simulation. Reliability estimates of PHWR inner containment subjected to an internal pressure exceeding the design pressure, considering three stages of progressive failure prior to collapse are presented.     

The Time Dependence of the Detachment Force of Ground Micrometer-Size Particles from a Planar Substrate: Effect of Particle Rotation

The time dependence of the detachment force applied to 7 µm ground polyester particles coated with silica nanoparticles was determined by ultracentrifugation. It was found that the force required to separate the particles from the substrate increased during the first 24 hours and changed very little thereafter. Scanning electron microscopy (SEM) results suggest that the increase in adhesion is due to the particles rotating from their initial positions obtained during deposition. The role of the silica nanoparticles in determining the time dependence of the detachment force is discussed in terms of the JKR and Fuller–Tabor models.