Volume: 11
Number: 1
December 2013

To see an article directly, click its Title. To see abstract, click its [Abstract] link.

• MHD Free Convection Flow along a Vertical Wavy Surface with Linear Variation of Thermal Conductivity and Reciprocal Variation of Viscosity with Ternperature
  Nazma Parveen and M. A. Alim
  Abstract PDF
  MHD Free Convection Flow along a Vertical Wavy Surface with Linear Variation of Thermal Conductivity and Reciprocal Variation of Viscosity with Ternperature
  Nazma Parveen and M. A. Alim

  Abstract

  The present work describes the effect on MHD free convection flow of viscous in compressible fluid along a uniformly heated vertical wavy surface with temperature dependent thermal proportional conductivity to the linear function and viscosity. Viscosity considered is inversely of temperature. The governing boundary layer equations are first dimensionless transformed into a non-dimensional form using suitable set of variables. The resulting nonlinear system of partial differential equations are mapped into the domain of a vertical flat plate and then solved numerically employing the implicit finite difference method, known us the Keller-box scheme. The numerical results of the skin friction coefficient and the rate of heat transfer in terms of local Nusselt number, the stream lines us well as the isotherms are shown graphically for u selection of parameters set consisting of thermal conductivity variation parameter and viscosity variation parameter .
• An Experimental Investigation of Bio-Diesel Properties from Mustard Oil With and Without Trans-Esterification Reaction
  A. K. Azad, S. M. Ameer Uddin and M. M. Alam
  Abstract PDF
  An Experimental Investigation of Bio-Diesel Properties from Mustard Oil With and Without Trans-Esterification Reaction
  A. K. Azad, S. M. Ameer Uddin and M. M. Alam

  Abstract

  This paper presents an experimental investigation of the bio-diesel preparation from vegetable oil i.e. mustard oil. First time, the bio-diesel has been prepared by trans-esterification reaction or chemical process and blend in different proportion with diesel fuel. Again, without trans-esterification reaction, the mustard oil has been blended with diesel in different proportion of 20%, 30%, 40% and 50% and named as bio-diesel bland B20, B30, B40 and B50. The properties of the fuel ie. density, viscosity, dynamic viscosity, carbon residue, flash point, fire point & calorific value of pure mustard and its blends have been carried out in the fuel testing laboratory. During the fuel and bio-fuel have been tested in the laboratory, different ASTM standards are maintained to findout the properties of the bio-diesel. The comparisons are made between the blended bio-fuels which iss prepared with or without trans- esterificution re action.
• An Experimental Study of Heat Transfer and Friction in Turbulent Flow through the Smooth Square Duct
  A.K.M. Abdul Hamid, M.A. Taher Ali and A. R. Akhanda
  Abstract PDF
  An Experimental Study of Heat Transfer and Friction in Turbulent Flow through the Smooth Square Duct
  A.K.M. Abdul Hamid, M.A. Taher Ali and A. R. Akhanda

  Abstract

  In this paper, forced convection heat transfer is studied experimentally and calculated values of local us well as average heat transfer coefficients and friction factors for a few developed turbulent flow in an asymmetrically heated smooth square duct at constant heat flax are presented Nasselt numbers, Friction factors and Stanton numbers have been calculated for ten different over the range of 5 104 Re Reynolds numbers 1 105. The effects of Reynolds number and location of positions of y/B across the duct on the distributions of mean heat transfer and friction of local as well as average factor are studied in the present investigation it is found that on an average, of 57.44 percent increase in Reynolds number the static pressure drop is increased by 185.61 percent and the Nusselt number is increased by 40.63 percent. The results compared well with the published data for Nusselt number and Stanton number except Friction investigation the friction value for smooth non circular In the present obtained increases with increasing factor number instead of published factor. of Reynolds data where it decreases or approaches a constant ducts. The secondary flow pattern in the duct is reflected in the local distributions of the Nusselt number, the friction factor and the Stanton number the values of which on the heated wall of smooth square duct are respectively 1.035 to 1.225, 1.07 to 1.17 and 1.17 to 1,20 times higher than those for the smooth circular duct Compared with the published data for the flat plate the Nusselt number obtained in the present investigation is 2.32 (132.47 percent) times higher than that of the flat plate, The results are presented in their final concise form of compact correlations that involve dimensionless groups representing the characteristics of heat transfer and friction factors. These corrections may be used for in numerical analysis and for better design of heat transfer equipments for engineering applications
• Vision Inspired Adaptive Local Ternary Pattern for Face Recognition and Verification
  Md. Iftekharul Alam, Mohammad lbrahim, Ilumayun Kayesh, Shah Mostafa Khaled, Muhammad Mahbub Alam, Mohammad Shoyaib
  Abstract PDF
  Vision Inspired Adaptive Local Ternary Pattern for Face Recognition and Verification
  Md. Iftekharul Alam, Mohammad lbrahim, Ilumayun Kayesh, Shah Mostafa Khaled, Muhammad Mahbub Alam, Mohammad Shoyaib

  Abstract

  Face recognition and verification algorithms use a variety of features that describe a face. Most popular amongst these features are LBP (Local binary pattern) and its variant Local Ternary Pattern (LTP). LBP is very sensitive to near uniform region and is incapable of handling intensity actuation that often happens due to noise. This is addressed by introducing a fixed threshold in LTP. However, a xed threshold often fails to perfectly describe a feature. To address this issue, we propose an adaptive LTP (ALTP) that extends LTP to evoke vibrant threshold To verify the proposed methods we have used u recent challenging face database named Label Face in ll/ild (LFW). Our proposed ALTP method is light weight, and achieved an accuracy of 76.23%, which is impressive in contrast to other computationally inexpensive state of the art methods.