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They often are used to pump gases and vapours from a system to create a vacuum. The Nature properties of soil, 20th Edition and Pub Prentice-Hall Inc. Nevertheless, many of their possible services are overlooked. Key words: character recognition, features Extraction, adaptive Smoothing, Image segmentation, pattern matching, Image Pixel Rating Reference  T. Mitchell, "Machine Learning", Mc Graw-Hill Education (ISE Editions), December 1997. The results showed that the linear shrinkage improved from an average of 8.57% for the three samples for 0% sawdust to an average of 8.32% with 40% addition of saw dust, bringing them closer to the lower range of the international standard of 7-10%. In the other approach PID controller is employed for the plant model (microstructure development). "Application of control theory principles to optimization of grain size during hot extrusion," Materials Science and Technology, Vol 14, pp.25-31, Jan 1998. Ltd, New Delh Abstract: l Capital of Abuja like linear shrinkage, solid density, apparent porosity and thermal conductivity were characterized with a view of studying the effect of sawdust on them. The state-space model together with an optimality criterion is used to control the percentage of volume fraction recrystallization using Linear Quadratic Regulator method.
Solid density averaged 3.18g/cm3 with 0% saw dust and 2.91g/cm 3 with 40% saw dust, still bringing them closer to the international range of 2.3-3.5g/cm3 . The simulation is done on various values for percentage of volume fraction recrystallization using both the controllers by MATLAB simulink toolbox.  James C ,"Optimization of microstructure development during hot working using control theory,"Metullurgical and Materials Transactions A, Vol 28 A, pp.1921-1930, Sep 1997. This approach is applied to obtain the desired percentage of volume fraction recrystallization of '1' from an initial value of '0'. Antibacterial assay of synthesized Ag NP was carried out in solid (Nutrient Agar) growth medium against J., Interaction of silver nanoparticles with biological surfaces of Caenorhabditis elegans. 'Investigation and Improvement of Ejector Refrigeration System Using Computational Fluid Dynamics Technique' Energy Conversion and Management 2007; 56–64. Experimental investigation of a novel steam ejector refrigerator suitable for solar energy applications. In this Paper, a new approach for controlling microstructure development during hot working process by percentage of volume fraction recrystallization is proposed. One of the approaches is based on the Optimal Control theory and involves the developing of state space models to describe the material behavior and the mechanics of the process. The elemental composition of synthesized sample was confirmed by EDS analysis. (1999) Investigation on local refractory materials for high temperature applications, Ph D Thesis mech.  El-Dessouky H, Ettouney H, Alatiqi I, Al Nuwaibit G.  Monika HRADILOVÁa,b, Frank MONTHEILLET, Anna FRACZKIEWICZ, Christophe DESRAYAUD and Pavel LEJČEK, "Microstructure development of cadoped mg–zn alloy during hot deformation ", 23. The detailed characterization of the Ag NPs were carried out using UV-visible spectroscopy, Scanning electron microscopy (SEM), Energy dispersive X-ray Spectroscopy (EDS), Dynamic light scattering (DLS) analysis, and their antimicrobial evaluation was done against Escherichia coli. and Manivannan, G., Selective toxicity of Zn O nanoparticles toward Gram-positive bacteria and cancer cells by apoptosis through lipid peroxidation. 'Review on Solar-Driven Ejector Refrigeration Technologies. Renewable and Sustainable Energy Reviews 2009; 38–49. Usha,"Microstructure development by controlling grain size", Journal of computer science and control systems, Vol.5, No.2, October 2012. In this research, Silver nanoparticles (Ag-NPs) were synthesized from Ag NO3 solution by green synthesis process with the assistance of microbial source only. Toxicol In Vitro, 19 (7), 2005, 975-983(2005)  Premanathan, M., Karthikeyan, K., Jeyasubramanian, K.