Informatics Publishing Limited

D. Justin David ¹, Roopa Jayasingh ¹, K. Sankaranarayanan ²

Affiliations
1 Department of Electronics and Communication, Karunya University, Coimbatore, IN
2 EASA Engineering College, Coimbatore, IN

Abstract

Colorimeter passes a colored light beam through an optical filter, which transmits band of wavelengths of light through a sample solution to the calorimeter‟s photodetector where it is measured. The difference in the amount of monochromatic light transmitted through a colorless sample and the amount of monochromatic light absorbed by the sample. Colorimeters used in clinical laboratories perform well. The problem associated with colorimeters is that, it requires a highly monochromatic source, which needs frequent calibration. The depth of the color is dependent upon the concentration of hydrogen peroxide and therefore the amount of virus in the original sample. The time allotted for the reaction is critical. The main problem in this is inaccuracy and psychological complications. The existing colorimeter is upgraded with RGB color sensor and Microcontroller and interfaced with the computer to make clinical measurement easier. Experimental results show that this modified colorimeter can perform better than the existing colorimeter.

Keywords

Absorbance, Colorimeter, Color Measurement, Chromaticity Diagram, Jaundice, Justin David, RGB Color Sensor.

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R. Kanmani ¹, K. Sankaranarayanan ²

Affiliations
1 Sri Krishna College of Technology, Kovaipudur, Coimbatore-641042, IN
2 Easa College of Engineering and Technology, Navakarai, Coimbatore–641105, IN

Abstract

In wireless optical system, CDMA suits well for high bit rate systems where good security is needed and mobility is not important. One of the spreading codes used in wireless optical systems is prime codes. The algorithm for generating the sequence is very simple and the shortcomings are that it has larger auto correlation side lobes equal to p-1, its cross-correlation is not equal to 1 and the cardinality of the prime code is only equal to its weight .In order to reduce the cross-correlation of the prime code to 1, the extended prime code (EPC) has been proposed. The extended prime codes has cross-correlating constraint is equal to one and the autocorrelation constraint is equal to zero. So the extended prime code always performs better than the original prime code. The error probability of extended prime codes and prime code is compared in wireless OCDMA network. The bit error probabilities of Optical CDMA system using prime sequence codes and extended prime sequence codes are analyzed.

Keywords

CDMA-Code Division Multiple Accesses OOC–Optical Orthogonal Code, OCDMA-Optical CDMA, Prime Codes,Wireless Infrared.

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S. Lakshmi Narayanan ¹, K. Sankaranarayanan ², K. Priya ³, A. Priyanka ³, B. Priyanka ³

Affiliations
1 Sri Ramakrishna Engineering College, Coimbatore, IN
2 Sri Ramakrishna Institute of Technology, Coimbatore, IN
3 Sri Ramakrishna Engineering College, Coimbatore, Tamilnadu, IN

Abstract

VCS is one of the recent emerging areas in image secret sharing, where one can easily encrypt and share the image in secure way and which can be decrypted through the human visual system without computation. In this project, this scheme is implemented for hiding image in a video stream using two in one image secret sharing scheme (TiOISSS) with two decoding options. It is based on Visual Cryptography Scheme (VCS) and Polynomial based image secret sharing scheme (PISSS) known as Newton‟s raphson method and comparing the same with already existing Lagrange‟s interpolation method. This comparison is made to show the reduction in file size of shadow image for faster transmission within a distributed multimedia system.

Keywords

Secret Sharing, Visual Cryptography Scheme (VCS), Polynomial-based Image Secret Sharing Scheme (PISSS) – Lagrange‟s Interpolation and Newton-Raphson‟s Method.

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K. Sankaranarayanan ¹, K. Rajendran ¹, N. Gopalakrishnan ²

Affiliations
1 Central Institute for Cotton Research, Regional Station, Coimbatore (T.N.), IN
2 ICAR, Krishi Bhawan, New Delhi, IN

Abstract

The term ‘Extra Long Staple’ (ELS) cotton typically denotes a cotton fibre of extraordinary fibre length of more than 32.5 mm. normally extra-long staple cotton varieties are used for producing fine and superfine counts of yarn. As per the trade estimate the requirement of ELS cotton is around 15 lakh bales as against present availability of 1.4 lakh bales. Rangaraj, M. S/o Muthegowder, a farmer of Tamil Nadu had harvested 2.5 fold higher seed cotton yield (40.9 q/ha) as compared to control farmers by adopting integrated cotton management technologies. The economic analysis found that cost of cultivation of Rs. 61,750/ha, gross return of Rs. 1,84,092/ha, net return of Rs. 1,22,342/ha and benefit cost ratio of 2.98 realized by him, which were 1.72, 2.5, 3.3 and 1.5 fold, respectively higher than control farmers. The national average productivity of ELS is 370 kg /ha of lint. He obtained the productivity of 1325 kg of lint/ha.

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