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Rajendra Prasad, P.
- Studies on Controlled Release of Fertilizer Zinc Sulphate Made with Super Phosphate as Inert Matrix
Authors
1 Deptt. of Chemical Engineering, R. V. R and J. C College of Engineering, Guntur-522 019, A. P., IN
2 Department of Chemical Engineering, GMR Institute of Technology, Rajam-532 127, A. P., IN
3 Department of Chemical Engineering, Andhra University, Visakhapatnam-530 003, A. P., IN
Source
Nature Environment and Pollution Technology, Vol 8, No 4 (2009), Pagination: 807-816Abstract
The paper presents controlled release of zinc sulphate fertilizer made with super phosphate as inert matrix. Pellets were made from the mixture and the release rate of zinc sulphate with time was studied. The parameters covered are fractional zinc sulphate, fractional silicate lime, fractional super phosphate and diameter of the pellet. The parameters also measured with naphthalene coating pellets and compared. The release rate expression was obtained and represented as: -rA = 5.85 fZnSO4 1.9 fs 4.23 fsl -0.72 (dp/ds)1.2. The study is useful to identify the controlled release of zinc sulphate fertilizer and also to predict the release rate at any instant of time.Keywords
Controlled Release, Release Rate, Fertilizer, Inert Matrix, Binding Agent.Full Text
- Detection of Exudates in Diabetic Retinopathy Images using Laplacian Kernel Induced Spatial FCM Clustering Algorithm
Authors
1 MITS, Angallu(V), Madanapalle - 517325, Andhra Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 9, No 15 (2016), Pagination:Abstract
Diabetic Retinopathy (DR) is the consequence of micro-vascular retinal changes triggered by diabetes which can cause vision loss if not treated in a timely manner. The major sign of Diabetic Retinopathy are the presence of Exudates. This paper demonstrates a complete framework for the detection of Hard Exudates in Retinopathy images. This paper presents laplacian kernel and it is induced into the kernel spatial FCM clustering algorithm for the segmentation of retinal fundus images. In general, FCM and KFCM algorithms very sensitive to noise and other imaging artefacts because it doesn’t have spatial information. To overcome this problem, we presented Laplacian kernel spatial FCM which incorporates spatial information into its objective function and the fuzzy membership function. The performance of our proposed algorithm evaluated on different Diabetic Retinopathy images. The presented methodology is assessed using statistical measures like Sensitivity and Specificity.Keywords
Diabetic Retinopathy (DR), Fuzzy C Means Clustering algorithm (FCM), Kernel induced Fuzzy C Means Clustering algorithm (KFCM), Kernel induced Fuzzy C Means Clustering algorithm with induces Spatial constraint (KSFCM)Full Text
- Investigation of Mechanical Properties of A356/Al2O3/RHA by Stir Casting Method
Authors
1 VTU-RRC, Belagavi, Karnataka, IN
2 Yadavrao Tasgaonkar Institute of Engineering and Technology, Tal. Karjat, Raigad, Maharashtra, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 144-148Abstract
Conventional monolithic materials have limitations in achieving good combination of strength, stiffness, toughness and density. To overcome these shortcomings and to meet the ever increasing demand of modern day technology, composites are most promising materials of recent interest. Metal matrix composites possess significantly improved properties high specific strength, specific modulus and good wear resistance compared unreinforced alloy. Among MMC’s aluminium composites are predominant in use due to their low weight and high strength. The Key Features of MMC’s are specific strength and stiffness, excellent wear resistance, high thermal and electrical conductivity. The present investigations aim at the development of A356 aluminium alloy based Rice Husk Ash (RHA) and Al2O3 particulate reinforced hybrid metal matrix composites by stir casting route. Tensile strength and Hardness of the hybrid composites have been evaluated. Significant improvement in the properties was been observed with the addition of reinforcement. Further, properties of heat treated composites were enhanced when compared to as cast composites.
Keywords
Hybrid Composites, A356, Rice Husk Ash, Al2O3, Stir Casting.Full Text
- Influence of Heat Treatment on Tribological Properties and Corrosion Resistance of A356 Alloy Based Hybrid Composite
Authors
1 VTU-RRC, Belagavi, Karnataka, IN
2 Yadavrao Tasgaonkar Institute of Engineering and Technology, Tal. Karjat, Raigad, Maharashtra, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 149-154Abstract
In the present work stir casting process was introduced and the commercial A356 aluminium alloy reinforced with RHA/ Al2O3 particulates in equal proportions (1wt%, 2wt%, 3wt%, 4wt% and 5wt%) were used for the present study. A356 alloy belongs to a group of hypoeutectic Al-Si alloys and has wide applications in marine and automotive.RHA/Al2O3 based A356 hybrid composite is a refractory compound that exhibits outstanding features such as high melting point, high wear and corrosion resistance due to T6 heat treatment. After T6 heat treatment, the microstructures of (RHA/ Al2O3) undergo a remarkable change, leading to the improvement of tribological properties of hybrid composites. It was also observed that the density of hybrid composites decreased with increasing particle (RHA/Al2O3) content.
Keywords
Hybrid Composites, A356, Rice Husk Ash, Al2O3, Stir Casting.Full Text