SDM College of Engineering and Technology

About: SDM College of Engineering and Technology is a based out in . It is known for research contribution in the topics: Diesel fuel & Combustion. The organization has 350 authors who have published 351 publications receiving 2399 citations.

Implementation of vedic multiplier in image compression using DCT algorithm

Abstract: Digital multipliers are indispensable in the hardware implementation of many important functions such as DCT, IDCT, FFT etc in signal processing. This paper deals with Design and implementation of Vedic Multipler in Image Compression using DCT algorithm. The DCT (Discrete Cosine Transform) performs spatial compression of the data while IDCT performs decompression of the data. Here, matrix multiplication is one of the important step in both the transforms. Hence, to perform these computations, we introduce Vedic multiplier which is based on Urdhava Tiryakbhyam(vertical and crosswise) sutra. In this paper, we have designed DCT algorithm using Verilog and code is written in Xilinx I.S.E 7.1i version, synthesized on Xilinx Synthesis Tool (XST). We retrieved Register Transfer Logic (RTL) and the simulation results are observed on Modelsim 6.0 Simulator. These simulation results were compared with matlab simulation results. From the comparison, we see that DCT using Vedic Multiplier is efficiently implemented and the proposed Vedic multiplier significantly improves the computational speed involved in multiplication operations of the image processing. Hence, Vedic multipliers can find immense use in applications of image processing to save time and area.

Statistical Analysis of Polymer Nanocomposites for Mechanical Properties.

Abstract: Epoxy resins, due to their high stiffness, ease of processing, good heat, and chemical resistance obtained from cross-linked structures, have found applications in electronics, adhesives coatings, industrial tooling, and aeronautic and automotive industries. These resins are inherently brittle, which has limited their further application. The emphasis of this study is to improve the properties of the epoxy resin with a low-concentration (up to 0.4% by weight) addition of Multi-Walled Carbon Nanotubes (MWCNTs). Mechanical characterization of the modified composites was conducted to study the effect of MWCNTs infusion in the epoxy resin. Nanocomposites samples showed significantly higher tensile strength and fracture toughness compared to pure epoxy samples. The morphological studies of the modified composites were studied using Scanning Electron Microscopy (SEM).

Studies on effect of pre-crack length variation on Inter-laminar fracture toughness of a Glass Epoxy laminated composite

Abstract: Laminates of fiber reinforced polymer composites are good in in-plane properties and inherently weak in through thickness direction. To address this through thickness properties, the inter-laminar fracture toughness (GIc and GIIc) of a unidirectional (UD) Glass epoxy composite laminates were subjected to Mode-I and Mode-II loadings. Experiments were conducted using Double cantilever beam (DCB) and End notch flexure (ENF) specimens with varying pre-crack lengths. Mode I energy release rate (GIc) were also evaluated with modified beam and modified compliance theories. The experimental results reveal that, GIc fracture toughness increases with increasing in pre-crack length, where as in GIIc the effect of increase in pre-crack length exhibits reduced fracture toughness.