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45 results on '"Sivakumar, D."'

1. DC-6 GHz GaAs MMIC Compact SPDT Switch

Author

Tulasi Sivakumar D, Sari. S, Karthik. S, and Nagaveni. H

Subjects
Materials science, business.industry, Process (computing), Topology (electrical circuits), High-electron-mobility transistor, Die (integrated circuit), Gallium arsenide, Switching time, chemistry.chemical_compound, chemistry, Optoelectronics, Insertion loss, business, Monolithic microwave integrated circuit
Abstract

This paper introduces a GaAs MMIC Single Pole Double Throw (SPDT) switch up to C-band using pHEMT device. This switch operates from DC to 6GHz. Insertion loss obtained is less than 1dB., input and output returnloss are better than 15dB at 6GHz. Isolation of the switch obtained is better than 35dB. 0.25um process is used for designing SPDT switch. Reflective switch topology is adopted for this design. Die dimension is 1.36mm x 1.4mm x 0.1mm. Typical Switching speed is 20nS.

Published
2020

2. Early Forecasting and Prevention of Cardio Vascular Disease Based on Human Life Style Factors

Author

Suganthi S and Sivakumar D

Subjects
Recall, Computer science, business.industry, Process (engineering), Human life, Decision tree, Information repository, Machine learning, computer.software_genre, Style (sociolinguistics), Cohen's kappa, Artificial intelligence, Cluster analysis, business, computer
Abstract

In the rapid growing world living fashion of human beings are distorted a lot and will influence the healthiness situation of human beings. The World Health Organization (WHO) statistics provides information that the cardio vascular diseases have an immense deal of interest inmedical research owing to its impact on person healthiness. This research study is intended torecognize and analyze the human life style factors in forecasting the cardio vascular disease with data mining techniques. The data collected from the range of citizens living in Bangaloreregion and the data obtainable inside online data repository are the input to this research analysis. Classification techniques K-means clustering algorithm and the decision tree approaches are used in this study and the precision, recall, accuracy and the F-measures are the measures estimated to prove the results with the different error measures RMSE, MAE and Kappa statistic values. This early forecasting process is proved with an accuracy of 94.56 percentages in K-means and 93.37 percentages with decision tree techniques.

Published
2018

25. A survey of routing algorithms for MANET.

Author

Sivakumar, D., Suseela, B., and Varadharajan, R.

Abstract

A mobile ad-hoc network (MANET) is a collection of mobile nodes which communicate over radio. These kind of networks are very flexible, thus they do not require any existing infrastructure or central administration. Therefore, mobile ad-hoc networks are suitable for temporary communication links. As the nodes are mobile, it is very difficult to find the path between two end points. This paper presents a survey of routing algorithms for finding path between nodes in mobile ad hoc network. . In recent years,several routing algorithms have been proposed for mobile ad hoc networks and prominent among them are ant-colony, bee-colony, termite, distance vector routing and novel. The functions and features involved in implementation of different routing algorithms for MANET are discussed in detail giving comparative study of various routing algorithms. [ABSTRACT FROM PUBLISHER]

Published
2012

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