January 2012 Issue Vol.2 No.1
Abstract: The near field and far field radiation patterns will give the range of radiation of the antenna in all directions. The present paper deals with the near and far field radiation characterization of super hybrid shaped serrated microstrip patch antenna. All the four sides of the patch consist of different shapes like square, triangular, pyramidal and conical with different dimensions. The performance characteristics of the proposed super hybrid serrated antenna are simulated with respect to the radiation pattern characterization. The antenna output parameters like returnloss, gain and field distribution are also presented in this paper.
Keywords: Nearfield, farfield, super hybrid microstrip patch antenna.
1 Assistant Professor, Anjuman College of Engineering,Nagpur- India
2 Principal,S. B. Jain Institute of Technology, Management,Nagpur- India
3 Ex. Dean,Faculty of Engineering & Technology,RSTM & Research, Nagpur University,Nagpur-India.
4 Assistant Professor, M. H. Saboo Siddique College of Engineering, Byculla, Mumbai - 8 - India
Abstract: Lined canal with free board reduces the friction slopes, which enables the canal to be laid on a flatter bed slope. This increases the command area of canal, on other hand, as the lining permits higher average velocities, the canal can be laid on steeper slope to save the cost of earth work in formation. As the lining provide rigid boundary, it ensures protection against bed bank erosion. This paper presents design equation for minimizing the total cost of canal lining and excavation with free board. This can be overcome by using manning equation. It involve lining cost, cost of earth work which varies with the excavation depth, on account of complexities of analysis. The optimal cost equation along with the corresponding section shape coefficient is useful during the planning of canal project. A network of canal represent a major cost item in an irrigation project and economy of the canal network is vital. The maximum economy is achieved by minimizing the cost of lining of canal and excavation with free board. This technique is developed by taking illustration numerical example.
Keywords: Round cornered Trapezoidal section, Lined canal, Depth of flow, Discharge, free board Excavation Optimal canal section.
Abstract: The urbanization across the world has resulted in increased demand for refrigeration and air conditioning. The main disadvantage with the conventional method i.e. vapor compression system is environment pollution. Another problem faced during urbanization is energy crisis. The adsorption refrigeration system is one of the solutions to this problem. The advantages of this system are environment friendly, less noise, use of waste heat or solar energy. But the disadvantage with adsorption system is low coefficient of performance (COP) and bulkiness. Researchers across the world are working on this issue to make adsorption system a viable alternative to the compression systems. Since the last two decades considerable work is being done on the use of composite adsorbents to improve the heat and mass transfer performance. This kind of adsorbent is usually obtained by the combination of a chemical adsorbents and physical adsorbents.
Keywords: Refrigeration, Compression System, Adsorption System, Composite Adsorbents, Coefficient of performance (COP).
* Department of Mathematics, Dr.Y.S.R. Engg. College of Technology, Kadapa, A.P., INDIA
** Department of Mathematics, Keshav Memorial Institute of Technology, Hyderabad, AP., INDIA
*** Department of Mathematics, Sri Venkateswara University, Tirupathi, A.P., INDIA
Abstract: Peristaltic transport of a Bingham fluid in a channel with permeable walls is studied under long wavelength and low Reynolds number assumptions. This model can be applied to the blood flow in the sense that erythrocytes region and the plasma regions may be described as plug flow and non-plug flow regions. The effect of yields stress, Darcy number and slip parameter on the pumping characteristics are discussed through graphs.
Keywords: Peristaltic transport, Bingham fluid, permeable walls.