International Journal of Research and Reviews in Applied Sciences
ISSN: 2076-734X, EISSN: 2076-7366

Volume 1, Issue 3 (December, 2009)

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1. Soil stabilization with Flyash and Rice Husk Ash
by Robert M. Brooks

The objective of this paper is to upgrade expansive soil as a construction material using rice husk ash (RHA) and flyash, which are waste materials. Remolded expansive clay was blended with RHA and flyash and strength tests were conducted. The potential of RHA-flyash blend as a swell reduction layer between the footing of a foundation and subgrade was studied. In order to examine the importance of the study, a cost comparison was made for the preparation of the sub-base of a highway project with and without the admixture stabilizations.

Stress strain behavior of unconfined compressive strength showed that failure stress and strains increased by 106% and 50% respectively when the flyash content was increased from 0 to 25%. When the RHA content was increased from 0 to 12%, Unconfined Compressive Stress increased by 97% while CBR improved by 47%.

Therefore, an RHA content of 12% and a flyash content of 25% are recommended for strengthening the expansive subgrade soil. A flyash content of 15% is recommended for blending into RHA for forming a swell reduction layer because of its satisfactory performance in the laboratory tests.

2. Modified Adaptive Center Weighted Median Filter for Suppressing Impulsive Noise in Images

by Behrooz Ghandeharian, Hadi Sadoghi Yazdi and Faranak Homayouni


In this paper, a new switch median filter is presented for suppression of impulsive noise in image. The proposed filter is Modified Adaptive Center Weighted Median (MACWM) filter with an adjustable central weight obtained by partitioning the observation vector space. Dominant points of the proposed approach are partitioning of observation vector space using clustering method, training procedure using LMS algorithm then freezing weights in each block are applied to test image. The proposed method includes fuzzy clustering part for clustering the observed vector of each pixel into one of M mutually exclusive blocks. In the training phase, Least Mean Square (LMS) algorithm use to train center weight in each block then obtained weights used in testing phase. Final results shows better performance in the impulse noise reduction over standard images relative the median (MED) filter, the switching scheme I (SWM-I) filter, the signal dependent rank order mean (SD-ROM) filter, the tristate median (TSM) filter, the fast peer group filter (FPGF), the fuzzy median (FM) filter, the PFM filter and the adaptive center weighted median (ACWM) filter.

3. Evaluation of Some Reliability Parameters for Tele-Communication System by Boolean Function Technique
by Deepankar Sharma and Neelam Sharma

The author in this paper have tried to evaluate the reliability and M.T.T.F. of telecommunication system by using Boolean function technique. Reliability of telecommunication system has been evaluated by considering that failure for various components of the telecommunication system follow arbitrary distribution. In particular, the symbolic reliability; viz., M.T.T.F. (mean time to failure) has also been calculated, in case, all the failure follow exponential time distribution. A numerical example with graphical illustrations has been appended at the end to highlight the practical utility of the model.Therfore, for a given set of parametric values of failure rates, one can obtained the values of the reliability and M.T.T.F.well in advance to forecast the operable behavior of such a complex system.

4. An Enhanced Content-Based Video Retrieval System Based on Query Clip
by T.N.Shanmugam and Priya Rajendran

Content-based search and retrieval of video data has become a challenging and important issue. Video contains several types of audio and visual information which are difficult to extract, combine or trade-off in common video information retrieval. This research work is the enhanced version of our previous research with texture feature extraction. In this paper, we address the specific aspect of inferring our enhanced approach for content-based video retrieval from a collection of videos. Specifically, we present a video data model that supports the integrated utilization of various approaches. To begin with, the system splits the video into a sequence of elementary shots and extracts a small number of representative frames from each shot and subsequently calculates frame descriptors depending on the Motion, Edge, Color and Texture features. The video shots are segmented using 2-D correlation coefficient technique. The motion, edge histogram, color histogram and texture features of the elementary video shots are extracted by employing Fast Fourier transform and L2 norm distance function, Statistical approach, HSV color space conversion and Gabor wavelets using Fast Fourier transform respectively. The elementary video shots’ features, extracted using the above approaches, are stored in feature library. On the basis of a query clip, the videos are retrieved in our system. The color, edge, texture and motion features are extracted for a query video clip and evaluated against the features in the feature library. With the help of Kullback- Leibler distance similarity measure the comparison is carried out. Later, similar videos are retrieved from the collection of videos on the basis of the calculated Kullback- Leibler distance.

5. An Opamp Based 100W Triple Input Complementary Audio Mixer Amplifier With Independent Tone Control
by Kwaha B. J,Amalu P, and Mafai B. U.

A triple input complementary audio amplifier mixer with independent tone control was constructed.  The construction was carried out using opamps. The circuit was constructed such that each of the three inputs has its tone control. At the output stage, the power resistors 0.47Ω (5W) were used to maintain a stable bias and introduce some local feedback. The output voltage was measured and recorded at various frequencies using the oscilloscope. The frequency variation was carried out on the signal generator and the output voltage read from the oscilloscope with a constant input voltage of 0.2V. The frequency response of the amplifier was plotted - voltage gain Av(dB) against the frequency f(kHz).  The bandwidth and roll-off were obtained from this curve as 19.9KHz and 1.839dB/KHz respectively.  Also, the voltage, current and power gains were calculated as 13.63dB, 23.52dB, and 19.04dB respectively.  The efficiency was found to be 62.59%.

6. A Simple Algorithm for Thermo-Elasto-Hydrodynamic Lubrication Problems
by Hashim Khan, Prawal Sinha and Anupam Saxena

A computational algorithm is described for the solution of thermal elastohydrodynamic lubrication (EHL) problem of infinite line contacts. The Reynolds, elasticity and energy equations are solved simultaneously using a modified Houpert and Hamrock fast approach. The numerical procedure is fully automated and the scheme converges rapidly. To illustrate the numerical method, thermal EHL of rough surfaces with deterministic roughness models are analyzed. The effects of various loads, speeds and slide/roll ratios on the bearing characteristics have been investigated. It is observed that the EHL of rough surfaces is significantly influenced by the consideration of thermal effects. The present numerical scheme can also be extended to the analysis of two-dimensional thermal EHL problems such as finite line contact and point contact problems.