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Articles by R. Radha
Total Records ( 3 ) for R. Radha
  R. Radha and S.P. Rajagopalan
  Fuzzy logic is a computational paradigm that provides a mathematical tool for dealing with the uncertainty and the imprecision typical of human reasoning. A prime characteristic of fuzzy logic is its capability of expressing knowledge in a linguistic way, allowing a system to be described by simple, human-friendly rules. The fuzzy set framework has been utilized in several different approaches to modeling the diagnostic process. In this paper Diabetes related diseases and their symptoms are taken. The physician’s medical knowledge is represented as a fuzzy relation between symptoms and diseases. Thus, given the fuzzy set A of the symptoms observed in the patient and the fuzzy relation R representing the medical knowledge that relates the symptoms in set S to the diseases in set D, then the fuzzy set B of the possible diseases of the patient can be inferred by means of the compositional rule of inference. Fuzzy membership values for representing different symptoms are framed and they are used for forming the relations.
  R. Radha , S. Jayalakshmi and S.P. Rajagopalan
  In this study we show that the gene-expression profiles based on microarray analysis can be used to predict the genes which are responsible for death of the patient in early-stage B-cell Lymphoma. This study presents a new computational method for this prediction and use an informative subset of samples to identify genes whose expression is related to the problem under study. A reduction technique integrating global normalization, fuzzy membership generation, Pearson`s correlation method are used to identify genes which are related to non survival. The early identification of the genes causing B-cell Lymphoma that leads to death will benefit patients in the sense that the patients can be provided proper therapy to increase their life span. The validity of the results are established with the help of statistical methods.
  Sundararaman Rajagopalan , K. Pravallika , R. Radha , Har Narayan Upadhyay , J.B.B. Rayappan and Rengarajan Amirtharajan
  The inventions and innovations in the multimedia communication have revolutionized the infotainment world. With the advancements in multimedia , there is a growing demand to use the image, audio, video and text ingredients for information protection. In the field of steganography, the cover to carry over the secret information has been an image in many of the reported works due to high payload carrying capacity. However audio steganography on hardware platform provides the user an option to use multicarrier steganography on common chip. Here we propose a method of steganography which has been implemented on Cyclone II FPGA EP2C20F484C7 which houses an architecture with LSB substitution of Huffman encoded secret message on select parts of digitized audio signal. The experimental results show that a SNR of 127.7 dB has been obtained for 100 bits payload with embedding process done on every 2000th memory location of 16-bit digitized audio signal stored in External SRAM.
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