The rapid expansion of a supercritical solution (RESS) process is a promising method for the production of small, uniform and solvent-free particles of solutes. The RESS containing a non-volatile solute leads to loss of solvent power by the fast expansion of the supercritical solution through an adequate nozzle, which can cause solute precipitation. The nozzle configuration plays an important r...

Millimeter-wave (mm-wave) imaging provides compelling capabilities for security screening, navigation, and biomedical applications. Traditional scanned or focal-plane mm-wave imagers are bulky and costly. In contrast, phased-array hardware developed for mass-market wireless communications and automotive radar promise to be extremely low cost. In this work, we present techniques which can allow ...

Submerged arc welding process is usually employed for welding of thick workpieces. Quality of submerged arc welded components depends on various factors. Selection of appropriate process parameters for joining metallic components is needed to obtain sound weldment. Many researchers carried out investigations to find out appropriate process conditions to obtain quality submerged arc welded compo...

This paper presents, the experimental study has been made to optimize the process parameters during machining of H-13 by wire electrical discharge machining (WEDM) using Taguchi L9 orthogonal array method. Following input process parameters of WEDM [Pulse-On time (TON), Pulse-Off time (TOFF) and Wire Speed rate (WS) and Wire Tension (WT)] were chosen as variables to study the process output in ...

The optimization of solid-substrate medium and fermentation conditions for the production of enzyme carrageenase by a Pseudomonas aeruginosa ZSL-2 was achieved for the first time by employing an orthogonal array testing strategy (OATS). Of the four different substrates tested, wheat bran showed maximum production of carrageenase enzyme. The factors that influence the solid-substrate fermentatio...

A Room square of side n is an n by n array of cells, whose entries are chosen from a setS of n + 1 objects called symbols, which satisfies the following conditions: (i) every cell of the array is either empty or contains an unordered pair of distinct symbols from S; (ii) each symbol occurs in every row and in every column of the array; (iii) every unordered pair of symbols occurs precisely once...

This paper presents techniques for handling symmetries in integer linear programs where variables can take integer values, extending previous work dealing exclusively with binary variables. Orthogonal array construction and coloring problems are used as illustrations.

We prove a quantum query lower bound Ω(n) for the problem of deciding whether an input string of size n contains a k-tuple which belongs to a fixed orthogonal array on k factors of strength d ≤ k − 1 and index 1, provided that the alphabet size is sufficiently large. Our lower bound is tight when d = k − 1. The orthogonal array problem includes the following problems as special cases: • k-sum p...

CNC turning is widely used as a manufacturing process through which unwanted material is removed to get the high degree of surface rough. In this research article, Taguchi technique was coupled with grey relation analysis (GRA) to optimize the turning parameters for simultaneous improvement of productivity, average surface roughness (Ra), and root mean square roughness (Rq).Taguchi technique L2...