Areas of Current Research Interest : 
1) Study of Chaotic Behavior in Nonlinear Systems
2) Nonlinear Time Series Analysis of Astrophysical Data
3) Stochastic Resonance and Noise Induced Resonance Phenomena
4) Chaos in Small World Systems & Networks 

Contributions to Teaching:
1) An electronics Practical Text book was prepared for the B. Sc students and a Practical Guide in General Physics Experiments for M. Sc. Students of Mahatma Gandhi University. 
2) Resource Person for Seminars and Workshops conducted by various Colleges under Mahatma Gandhi University. 
3) Resource Person for the UGC/ CSIR Net Coaching classes organized by Maharajas College, Ernakulam, under the scheme of Cluster of Colleges in Mahatma Gandhi University, since 2009. 
4) Question Paper Setter for M. Sc Photonics Course of Cochin University of Sci. & Technology, since 2005. 

Books Published:
1) Co-Author of the Book "Methodology of Physics" prescribed for study for the B.Sc. students of the MG University. 

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1) Study and characterization of complex networks based on nonlinear time series analysis tools, sponsored by Department of Science and Technology (DST), Govt. of India. (Ongoing) 

2) Studies on the multifractal properties of astrophysical time series data as Principal Investigator, sponsored by Department of Science and Technology (DST), Govt. of India. 

3) Stochastic resonance studies on pendulum systems and maps as Co-Investigator, sponsored by the Department of Science and Technology (DST), Govt. of India.

1) K. P. Harikrishnan, R. Misra and G. Ambika, Search for Deterministic Nonlinearity in the Light Curves of the Black Hole System GRS 1915 + 105, Chaotic Modeling and Simulation, Vol. 3, (2012), p.477 

2) K. P. Harikrishnan, R. Misra and G. Ambika, Revisiting the box counting algorithm for the correlation dimension analysis of hyperchaotic time series, Commun. Nonlinear Sci. and Numerical Simulations, Vol. 17, (2012), p. 263 

3) K. P. Harikrishnan, R. Misra and G. Ambika, Nonlinear Time Series Analysis of the Light Curves from the Black Hole System GRS 1915+105, Research in Astron. & Astrophys., Vol. 11, (2011), p.71 

4) K. P. Harikrishnan, R. Misra, G. Ambika and R. E. Amritkar, Computing the multifractal spectrum from time series: An algorithmic approach, CHAOS, Vol. 19, (2010)143129 

5) K. P. Harikrishnan, R. Misra, G. Ambika and R. E. Amritkar, Parametric characterization of a chaotic attractor using the two scale Cantor measure, Physica D, Vol. 239, (2010) p. 420 

6) K. P. Harikrishnan, R. Misra and G. Ambika, Combined use of correlation dimension and entropy as discriminating measures for time series analysis, Comm. in Nonlinear Sci. and Numerical Simulations, Vol.14 (2009) p. 3608 

7) K. P. Harikrishnan, R. Misra and G. Ambika, Efficient use of correlation entropy for analyzing time series data, Pramana J. Phys., Vol.72 (2009) p. 325 

8) K. P. Harikrishnan and G. Ambika, Resonance Phenomena in discrete systems with bichromatic input signal : European Phys. Journal B, Vol.61 (2008) p.343. 

9) K. P. Harikrishnan, G. Ambika and R. Misra, An algorithmic computation of correlation dimension from time series, Modern Phys. Letters B, Vol. 21 (2007) p. 129 

10) K. P. Harikrishnan, R. Misra, G. Ambika and A. K. Kembhavi, A non-subjective approach to the GP algorithm for analyzing noisy time series : Physica D, Vol. 215 (2006) p. 137