BIO DATA

Dr. A. UNNIKRISHNAN, Outstanding Scientist & Associate Director (Retd from NPOL, Kochi 682 021 in October 31, 2014 ) & Principal Rajagiri School of Engineering and Technology, Kakanad, Kochi 682 039

Educational qualifications

BSc (Engg) , 1975 REC Calicut (Calicut University)

I Class(Hons) I rank

M.Tech, 1978 IIT Kanpur CPI = 9.33/10

Ph. D, 1988 IISc. Bangalore Thesis: Hierarchical Data structures based on quad trees

Employment History

Sc. B CEERI, Pilani APR 1978 to JUN 1978

SSO II NPOL, Kochi 26 JUN, 1978 to 30 JUN, 1981

Sc. C NPOL, Kochi 01 JUL 1981 to 30 JUN, 1985

Sc. D NPOL, Kochi 01 JUL 1985 to 30 JUN, 1990

Sc. E NPOL, Kochi 01 JUL 1990 to 30 JUN, 1996

Sc. F NPOL, Kochi 01 JUL 1996 to 30 JUN, 2003

Sc. G NPOL, Kochi 01 JUL 2003 to 14 SEP, 2011

Outstanding Scientist

NPOL, Kochi 14 SEP, 2013 to 31 OCT, 2013 (date of superannuation)

Professor & Dean

Rajagiri School of Engineering and Technology, Kochi 39

30 November, 2013 to 31 March 2014

Principal Rajagiri School of Engineering and Technology, Kochi 39

01 April, 2014 till date

Professional Achievements R&D Experiance

1. I have Worked on as many as 7 major Sonar Projects for India Navy

towards indigenization of Sonar system development for ships, submarines and Helicopters. The work included design, implementation and testing. I have also participated in the integration, testing and commissioning of Sonar systems on Ships, Submarines and Helicopters for Indian Navy. I have spent a long time in developing classification techniques of underwater contacts, by applying Soft Computing techniques. I have developed and implemented Signal Processing algorithms on Sonar systems.

2. I led a team in developing algorithms for Signal Information Processing and Machine Learning. In this exploratory project, many new ideas were tried out and introduced for successful implementation in NPOL Sonar systems subsequently. They include High Resolution Array Processing, Target Tracking, Independent component analysis, Higher order spectral techniques and model based signal processing.

3. I led a multi Lab project called Integrated Coastal Surveillance System, where may responsibility was to integrate and demonstrate data fusion from a variety of sensors like Radar, Sonar , Automatic identification system and communication intercept systems. I functioned as Principal Project Director, leading a team of seven Project Directors from seven DRDO labs. As I left NPOL on 31 OCT, 2013 on superannuation, I could ensure nearly 70-80% of project integration work completed.

4. I was the Chairman of the HRD Council for more than 5 years in NPOL, when I could stream line the training policy for Scientists of NPOL, including short term training, deputation for Post graduate studies and PhD at various universities/IITs/ I.S.Sc in India.

5. I was also the member of the Naval Research board panel on (i) Computing and (ii) Sonar Signal Behaviour, until 31 OCT, 2013. The panel was responsible for awarding development projects to Academic Institutions and monitoring the progress.

6. Served as second in command at NPOL during 2010 to 2013, when I used to offer administrative and technical support to Director, NPOL , including officiating as Director, when necessary. The administrative assignments included budget monitoring, answering audit observations and others related to day to day administration of the lab. The technical responsibilities included preparation of project dossiers and participation in project reviews

7. During 2012-2013, I was also a member of the Board of Directors, Keltron Trivandrum

Academic Experiance

1. Subsequent to my retirement from DRDO, I have joined the Rajagiri School of Engineering & Technology, Kakanad, Kochi as the Professor in the department of Electrical engineering on 01 DEC, 2013.I took over as

the Principal of the College on 01 April, 2014. As the Principal, I could stream line the UG and the PG programme offered at the Rajagiri School of Engineering & Technology. I also designed a special facilitation package to help the PhD staff registrants of RSET, which provides them a lightly loaded assignment for one semester. The package has been extensive used by many of my colleagues and as many as five are now in the process of submitting their synopsis. Various steps have been initiated and piloted by me to enhance the research and consultancy of the contributions of the faculty members.

2. Guided 9 PhD thesis, 1 from IISc Bangalore, 1 from Defence institute of

Armament Technology, Pune and 7 from Cochin University. The following theses have been completed under my supervision

Title Student University & year of award

1. Predictive Approaches For Gaussian Process Classifier Model Selection

S. Sundara rajan

Indian Institute of Science, Bangalore 2003

2. Some efficient representations of 3D information based on octtrees

Sojanlal P Cochin University of Sc, and Technology, 2000

3. Development & and Evaluation of Blind identification Techniques for Non linear systems

Rajesh M.V

Cochin University of Sc, and Technology, 2010

4. Development of time frequency techniques for Sonar applications

Roshen Jacob

Cochin University of Sc, and Technology, 2010

5. Development and evaluation of soft computing techniques for sensor less vector control of AC machines

Bindu V Cochin University of Sc, and Technology, 2012

6. Source localization using Sparse vector sensor array in shallow ocean

N Suresh kumar

Defence Institute of Armament Technology,2014

7. Development of hierarchical clustering techniques for gridded data from mixed data sets

Bindiya. M Varghese

Cochin University of Sc, and Technology, 2014

8. Mathematical Morphology on Hypergraph Spaces and its Applications in Image Processing

Bino Sebastian

Cochin University of Science & Technology, January 2015

9. Neural Network based modeling, characterization and identification of Chaotic systems in nature

Archana. R

Cochin University of Science & Technology, July 2016

3. Evaluated a number of PhD thesis in Cochin University and MG University 4. Currently guiding 5 PhD students in Cochin University: one Scientist

from NPOL and others from academic institutions in and around Kochi, in areas like Sonar Signal Processing, Data mining, Soft computing techniques, Data Fusion, Mobile Adhoc networks, System modeling and Image Processing

5. Guided a number of ME/M. Tech thesis submitted to Cochin University. PSG College of Technology, Coimbatore, NIT Calicut and NIT Suratkal

Memberships in Professional Bodies. 1. Member , Board of studies in Electronics and Computer Science , Cochin

University 2. Member , Board of studies in Computer Science , MG University 3. Member, Faculty of Technology, Cochin University 4. Life Member , Computer Society of India 5. Life Member, Ocean Society of India 6. Fellow, Institution of Electronics and Telecommunication Engineers, India 7. Member IEEE and Computational Intelligence Society of IEEE 8. First Chairman, IEEE Kochi subsection under IEEE Kerala section 9. Convener, CGPC, Ernakulum 1 cluster

Areas of interest

Signal Information Processing, Sonar Signal Processing, Machine learning, Image Processing, Soft Computing, Model based Signal processing, System identification, Control of Electrical machines, Data mining and Sonar Technology Awards:

1. Award from the Scientific Advisor for the contributions made in the development and implementation of a Hull mounted Sonar for Indian Navy.

2. Award from the Scientific Advisor for the contributions made in the development and implementation of Submarine SONAR.

A. 56 Publications after July 2003.

1 M.V Rajesh1, A Unnikrishnan2, R Nandakumar3 “System Identification Using MLP and RBF Neural Networks”. Proc. the “National Seminar on Emerging Trends in Soft Computing based Artificial Intelligence”, the Department of Computer Science & Engineering, MBM Engineering College, Faculty of Engineering, Jai Narain Vyas University, Jodhpur, India-342011, February 27 to 29, 2004.

2 M.V Rajesh1, A Unnikrishnan2, R Nandakumar3, “Neural Network Approaches for System Identification”. Proc. the “International Conference on Instrumentation (INCON-2004)”, the Department of Instrumentation & Control, Pune Institute of Engineering and Technology (Govt. engineering College, Shivajinagar, Pune-5) and the Instrument Society of India, December 19 to 21, 2004.

3 Roshen Jacob, A. Unnikrishnan, “Transient Analysis using LIFTING based wave packet transform - - an implementation experience”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 82 - 90

4 Roshen Jacob, A. Unnikrishnan, “ Estimation of Chirp parameters using Fractional Fourier Transform”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 91 - 101

5 Muhammed Arshad, Sherley George, A. Unnikrishnan, “ Wigner Ville Distribution and its application in detection of Linear Chirp”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 103 - 106

6 Sarath Gopi, T. Ratnamani, A. Unnikrishnan, “ On the performance of EKF based Active target tracking under different Noise Conditions”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 139 – 144.

7 Sarath Gopi, T Soumini, A. Unnikrishnan, “ Performance Evaluation of Modified Polar Coordiate based EKF for Bearing only Tracking”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 145 -151

8 M.P Jayakrishnan, P. Balasubramanian, A. Unnikrishnan, “Model based Signal Processing Scheme for Passive Source Localization, Tracking”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 107 - 113

9 Manjula P Raj, Sherley George, A. Unnikrishnan, “Chirplet parameter estimation using Gaussian Mixture modeling and EM algorithm: an implementation experience”, Proc. Symposium on Ocean Electronics (Sympol 2005), Cochin University, pp 200 - 205

10 K. Radhakrishnan, A. Unnikrishnan, KG Balakrishnan, “ Model Recognition for Estimation of Direction of Arrival using Extended Kalman Filter”, Proc. IASTED International Multi Conference Signal Processing, Pattern recognition and Applications , FEB 15 –17, 2006, Innsbruck, Austria, 520-012, pp 1 – 5

11 Radhakrishnan, A. Unnikrishnan, KG Balakrishnan, “EM based Extended Kalman Filter for Estimation of Rotor Time-Constant of Induction motor”, Proc. IEEE ISIE 2006, Montreal, Canada, pp 2434 –2438

12 Anila John, Sreekanth Raja, Pradeepa R, Soumini T, A. Unnikrishnan, “IMM based Passive Tracking for Maneuvering targets”, Proc. International Symposium on Ocean Electronics, Sympol 2007, 11 – 14 December, 2007, pp 11-18

13 Prasad M, Pradeepa R, Rao Tatavarti, A. Unnikrishnan, “Texture modeling and discrimination using Gaussian Mixtures”, Proc. International Symposium on Ocean Electronics, Sympol 2007, 11 – 14 December, 2007, pp 27-32.

14 K Radhakrishnan, A. Unnikrishnan, KG Balakrishnan, “Bearing only tracking of Maneuvering Targets using Extended Kalman Filter and a Single coordinated turn model” , Proc. International Symposium on Ocean Electronics, Sympol 2007, 11 – 14 December, 2007, pp 33-41

15 Muralikrishna. P, Mercy Paul, Ratnamani, A. Unnikrishnan, ‘Echo Classification based on proximal SVM’, Proc. International Symposium on Ocean Electronics, Symbol 2007, 11 – 14 December, 2007 , 67-73

16 Nissar. K.E, Sooraj K Ambat, V.P. Felix, A. Unnikrishnan, “Target Classification using Proximal Support Vector Machines”, Proc. International Symposium on Ocean Electronics, Sympol 2007, 11 – 14 December, 2007, pp 74-80

17 Nissar. K.E, Sooraj K Ambat, V.P. Felix, A. Unnikrishnan, “Square Root Algorithm for Implementing MVDR Beam former”, Proc. International Symposium on Ocean Electronics. Sympol 2007, 11-14 December, pp 81-89.

18 M.V Rajesh1, Archana. R2 , R. Gopikakumari3,Jeevamma Jacob4, A Unnikrishnan5, “Neural Network Approaches for System Identification”. Proc. “National Seminar on Information, Communication & Intelligent Systems”, organized jointly by the Institution of Electronics & Telecommunication Engineers India (IETE) and Model Engineering College, Cochin, Kerala, India , 8th to 9th February-2008.

19 Archana. R 1, M.V Rajesh 2 , R. Gopikakumari3, A Unnikrishnan 4, ”On the Analysis of Nonlinear System Modeling with Feed Forward and RBF Neural Networks”. Proc. "Emerging Trends in Information and Communication Technology", the Institution of Engineers India (IEI) Cochin, Kerala, India, 28th to 29th August, 2008.

20 Archana R1, M.V Rajesh2, R. Gopikakumari3,Jeevamma Jacob4, A Unnikrishnan5, ”Study and Analysis of Nonlinear System Dynamics Using state Space Recurrent neural Network Modeling”. Proc. “Inter National Conference on Advanced Computing & Communication Technologies for High Performance Applications”, the Federal Institute of Science & Technology(FISAT), Angamali, Kerala, India, September, 24 to 26, 2008.

21 M.V Rajesh 1, Archana. R 2, R. Gopikakumari3, A Unnikrishnan4, “Analysis of Nonlinear System Dynamics in State Space Modeling with Recurrent Neural Networks”. Selected for oral presentation and published in the proceedings of

ICCCS 2008. (The 9th International Conference on Computers, Communications and Systems) at Daegu University, Korea on November 7, 2008.

22 M.V Rajesh1, Archana.R2, A Unnikrishnan3, R Gopikakumari4, “Evaluation of the ANN Based Nonlinear System Models in the MSE and CRLB Senses”. Accepted for oral presentation at the “5th International Conference on Artificial Intelligence and Neural Networks AINN\'08”, World Congress on Science, Engineering and Technology (WASET) , Bangkok, Thailand, December 17-19, 2008 and published in the proceedings of WASET, Volume 36, December, 2008, ISSN 2070-3740. http://www.waset.org/pwaset/v36/v36-167.pdf

23 Bindiya M Varghese, Unnikrishnan A, “Recursive Decision tree induction based on homogeneousness for data clustering”, Proceedings of International Conference on Cyberworlds, China, Sep 2008, IEEE Computer Society Press, pp 754-758.

24 Roshen Jacob , Tessamma Thomas and A. Unnikrishnan, “Applications of Fractional Fourier Transform in Sonar Signal Processing”, IETE Journal of Research, Jan-Feb Issue, 2009

25 M.V Rajesh1, Archana R2, R. Gopikakumari3, A Unnikrishnan4, Jeevamma Jacob5, ”On the State Space Modeling and Identification of Arrhythmia Data using Recurrent Neural Networks.” Proc. International Conference on Optoelectronics, Information and Communication Technologies 2009 (ICOICT2009), SCT College of Engineering, Pappanamcodu, Trivandrum, Kerala, India, Govt. College of Engineering, Trivandrum and Model Engineering College, Kochi. 26-27 February 2009

26 M.V Rajesh1, Archana.R2, A Unnikrishnan3, R Gopikakumari4, “ A Study on EKF Training Algorithm with EM for ANN Modeling of Nonlinear Systems”. Proc. The National Conference on Computational Science and Engineering, NCCSE 2009, Department of Computer Science, Rajagiri College of Social Sciences, Kalamassey, Kochi, Kerala, India-683 104, 6-7, February, 2009. ISBN 978-81-907044-0-3.

27 M.V Rajesh1, Archana R2, A Unnikrishnan3 , R Gopikakaumari4, “A Study on EKF Training Algorithm with MLE for the ANN Modeling of Nonlinear Systems.” Proc., the National Conference on Recent Innovations in Technology (NCRIT 2009) ,Rajiv Gandhi Institute of Technology, (RIT), Govt. Engineering College, Kottayam, March 26 to 28, 2009.

28 Bindiya M Varghese, Unnikrishnan A, Paulose Jacob, " Information Content Extraction on Quad Trees for Active Spatial Image Clustering" , World Congress of Computer Science Information Engineering, IEEE Computer Society Press, Mar 2009. ISBN- 978-0-7695-3507-4

29 Bindiya M. Varghese, Unnikrishnan A., Paulose Jacob, "Information Content Extraction on Quad Trees for Active Spatial Image Clustering," csie, vol. 4, pp.306-310, 2009 WRI World Congress on Computer Science and Information Engineering, April 2009

30 Roshen Jacob , Tessamma Thomas and A. Unnikrishnan, “Analysis of

Underwater Transients using Lifting based Wave Packet Transform”, DSP Journal, Volume 9, Issue 1, June, 2009 , ICGST, pp 25 – 32

31 M.V Rajesh, Archana R, A Unnikrishnan , R Gopikakaumari, “Particle Filter based Neural Network Modeling of Nonlinear Systems for State Space Estimation”, Proc. 21st Chinese Control and Decision Conference (2009 CCDC) , Guilin, China June 17 to 19, 2009, Northeastern University, China, organized by Guilin University of Electronic Technology, China, IEEE Control Systems Society and IEEE Industrial Electronics Society.

32 M.V, Rajesh*; R, Archana2; A, Unnikrishnan3; R, Gopikakaumari4, “Comparative Study on EKF Training Algorithm with EM and MLE for ANN Modeling of Nonlinear Systems”, accepted for presentation in the 29th Chinese Control Conference (CCC-2010), to be held in Beijing, China during July 27 to 29, 2010, which is organized by IEEE Control Systems Society, Beijing Institute of Technology, Technical Committee on Control Theory (CCA) and the Society of Instrument and control engineers.

33 V. Bindu, A Unnikrishnan, R Gopikakumari,“Kalman filter based Estimation of speed and rotor position of permanent magnet synchronous motor”, The proceedings of National Conference on Recent Innovations in Technology NCRIT 2010 4-6 March 2010 RIT Kottayam

34 Mangala Devi K.T., Elizabeth P. Cheriyan A. Unnikrishnan Sensor less Control of Permanent-Magnet Synchronous Motor using PI Controller, to appear in the Proc. National Symposium for Post Graduate Students, PSCG College of technology, Coimbatore, 24,25 APRIL, 2010

35 Archana R1, A Unnikrishnan2, R. Gopikakumari3, M.V Rajesh4)Application of Artificial neural networks for the modeling of chaotic sequences International Seminar on Applied Mathematics and Intelligent systems, Bharatmata College Thrikkakkara Kochi, November 2010.

.

36 Bindu V, A Unnikrishnan, R Gopikakumari ,”Sensorless vector control of PMSM using a blind system identification approach based on Extended Kalman filter algorithm”, IEEE International conference on Computational intelligence and Computing research ICCIC 2010 Tamilnadu College of Engg Coimbatore. (Electronic copy)

37 Bindu V, A Unnikrishnan, R Gopikakumari, “ Fuzzy logic vector control of

PMSM with fuzzy Kaman filter for the estimation of speed and rotor position”, International joint journal Conference in Engineering IJJCE 2011

38 Bindu V, A Unnikrishnan, R Gopikakumari, ”Adaptive fuzzy logic vector

control of Permanent magnet synchronous motor with a robust Extended Kalman filter” ,International journal on Industrial Electronics and control IJIEC

39 Bindu V, A Unnikrishnan, R Gopikakumari, “Fuzzy logic Vector control of

PMSM with speed and rotor position estimation using a blind technique based on EKF”, International journal on Applied Engineering Research IJAER, Vol6, No.7,2011, pages 967-977.

40 Bindu V, A Unnikrishnan, R Gopikakumari, Fuzzy Logic Vector Control of

PMSM with Fuzzy Kalman Filter for the Estimation of Speed and Rotor Position Int. J. on Recent Trends in Engineering & Technology, Vol. 05, No. 02, Mar 2011,pp113 -117

41 Bindu V, A Unnikrishnan, R Gopikakumari, “A blind estimation of speed and

rotor position with Extended Kalman filter of Permanent magnet synchronous motor from the measurements of stator currents., Special issue on International journal on Power Electronics in Electric/Hybrid vehicle applications (final review on)

42 Bindu V, A Unnikrishnan, R Gopikakumari, “A Robust Kalman Filter Based

Sensor less Vector Control of PMSM with LMS Fuzzy Technique”, International Journal of Modern Engineering Research, (paper accepted)

43. Archana, R. Unnikrishnan, A. Gopikakumari, R. Rajesh, M.V. “An intelligent

computational algorithm based on neural networks for the identification of chaotic systems”, Page(s): Proc. RAICS, 2011, Trivandrum, India, 22-24 Sept. 2011, pp 605 – 609, Digital Object Identifier : 10.1109, RAICS. 2011.6069382

44. Bindu V, A Unnikrishnan, R Gopikakumari,”Adaptive Gaussian membership function fuzzy logic vector control of Permanent magnet synchronous motor with a Robust Extended Kalman filter”,11th International Conference on Hybrid Intelligent Systems 2011 (HIS 2011),Melaka ,Malaysia.

45. Bindu V, A Unnikrishnan, R Gopikakumari,” Adaptive Fuzzy logic position

control of a stepper motor with Extended Kalman filter”, International conference on Power, Signals, Control and Computation EPSCICON 2012,03-

06 Jan, 2012, Vidya Academy of Science & Technology, Thrissur, India Digital Object Identifier: 10.1109/EPSCICON.2012.6175232

46. Archana R1, A Unnikrishnan2, R. Gopikakumari3 An Improved EKF based neural network training algorithm for the identification of chaotic systems driven by time series EPSCICON 2012, 03-06, 2012, Vidya Academy

of Science & Technology, Thrissur, Digital Object Identifier:

10.1109/EPSCICON.2012.6175233,

47. Nair, K.N.; Unnikrishnan, A.; Lethakumary, B. Demonstration of an

observation tool to evaluate the performance of ICA technique , International conference on Power, Signals, Control and Computation EPSCICON 2012,03-06 Jan, 2012, Vidya Academy of Science & Technology, Thrissur, India, Digital Object Identifier: 10.1109/EPSCICON.2012.6175248

. 47. Book Chapter, “Enhanced Spatial Mining Algorithm Using Fuzzy Quadtrees”,

Bindiya M. Varghese, A. Unnikrishnan and K. Poulose Jacob, Communications in

Computer and Information Science, 1, Volume 250, ,Computational Intelligence

and Information Technology Part 1, Pages 110-116, Springer. ISBN- 978-3-642-25734-6_17

48. Bindiya M Varghese, Unnikrishnan A, Paulose Jacob, ,Justin Jacob,

"Correlation Clustering Model for Crime Pattern Detection", IJACT: International Journal of Advancements in Computing Technology, Vol. 2, No. 5, pp. 125 ~ 128, 2010 ISSN : 2005-8039

49. Bindiya M Varghese , Jose Tomy J , Unnikrishnan A , Poulose Jacob K, “Clustering Student Data to Characterize Performance Patterns”, Special Issue on Artificial Intelligence, IJACSA 2011; 138-140. ISSN : 2156-5570

50. Archana R1,R.Gopikakumari2 ,A Unnikrishnan3, M.V Rajesh4, Time series modeling of nonlinear systems: a dynamic neural network approach ,National Conference on Information Communication and Intelligent systems,NCICIS 2011, Kochi in Feb 2011

51. Bino Sebastian. V, A.Unnikrishnan, Kannan Balakrishnan, Grey level co-occurrence matrices: genralisation and some new features, International Journal of Computer Science, Engineering and Information Technology (IJCSEIT), Vol.2, No.2, April 2012, DOI : 10.5121/ijcseit.2012.2213 151, pp 153-156

52. Preetha K G, A Unnikrishnan, Impact of Bandwidth on Multiple Connections in AODV Routing Protocol for Mobile Ad-hoc Network, to appear in Proc. ICCSEA- 2012 Delhi, India, May 25 ~27, 2012

53. Preetha K G1, A Unnikrishnan2 and K Poulose Jacob3, Performance Improvement of Multiple Connections in AODV with the Concern of Node Bandwidth, International Journal on AdHoc Networking Systems (IJANS) Vol. 2, No. 3, July 2012 , pp 47-55

54. Archana R, A Unnikrishnan and R Gopikakumari. Modeling of Venice Lagoon Time series with Improved Kalman Filter based neural networks. IJCA Special Issue on Advanced Computing and Communication Technologies for HPC Applications ACCTHPCA(5):10-15, July 2012. Published by Foundation of Computer Science, New York, USA

55. Archana R, A Unnikrishnan , R. Gopikakumari, omputation of state space evolution of chaotic systems from time series of output, based on neural network models International Journal of Engineering Research and Development, eISSN : 2278-067X, pISSN : 2278-800X, www.ijerd.com, Volume 2, Issue 2 (July 2012), PP. 49-56

56. Bindu V, A. Unnikrishnan, Goipikakumari K, “A blind estimation of speed and rotor position with extended kalman fitler of permanent magnet synchronous motor from the measurements of stator currents", proc INDICON 2012, Kochi 07-09 DEC,

57. N. Sureshkumar, Sonia Peter, A. Unnikrishnan, C Bhatacharya, Passive source localization using compressively sampled vector sensor arrays, , Proc. iMacs 2012

B. 18 Publications before July 2003

1. A. Unnikrishnan, Y V Venkatesh, “On the conversion of Raster to Linear Quad trees”, Proc. International Conference on Computers, Systems and Signal Processing, DEC 09 –12, 1984, Bangalore , R29, pp 954 – 958

2. A. Unnikrishnan, YV Venkatesh, Priti Shankar, “Connected Component Labeling using Quad trees – A Bottom up approach”, The Computer Journal, Vol. 30, No. 2, FEB 1987, pp 176 –182

3. A. Unnikrishnan, YV Venkatesh, Priti Shankar, “Computation of Distance Transform – a bottom up approach”, Proc. National Symposium on Signal Systems and Sonar, MAR 09 – 11, 1988, NPOL, Kochi, A 3.6 pp 1 – 4

4. A. Unnikrishnan, YV Venkatesh, Priti Shankar, “Threaded Linear Hierarchical quad trees for computation of geometric properties of Binary Images”, IEEE trans. On Software Engineering, Special Issue on Image Data Bases, Vol. 14, No. 5, MAY 1988, pp 659 – 665.

5. A. Unnikrishnan, YV Venkatesh, Priti Shankar, “Distribution of Black nodes at various levels in Linear Quad tree”, Pattern Recognition Letters, 1987

6. M. Premalatha, Ruby Paul, K. Satheeshkumar, B. Lalmohan, A. Unnikrishnan, “ A Fuzzy Rule based System – A design experience,”, J. Comp. Science and Informatics, Comp. Society of India, Vol. 20, No 2, DEC, 1990.

7. K. Satheeshkumar, A. Unnikrishnan, “On an efficient selection of rules to be fired in a Fuzzy rule based system”, J. Computer Science and Informatics, Comp. Society of India, Vol. 22, No 2, 1992

8. K. Satheeshkumar, , Maria Sparancia, A. Unnikrishnan, “A Neural Network for fast Inferencing on a Fuzzy Knowledge base”, Proc. IEEE COMPSAC 92, SEP 21 – 25, 1992, Chicago, Illinois, pp 369 –374

9. K Rameetha, Sandhya Prabhu, A. Unnikrishnan, “A Parallel Realization of Echo Simulation algorithm – An Implementation Experience”, Proc. National Symposium on Ocean Electronics, DEC 18-20, 1995, Cochin University, pp117 – 122

10. Unnikrishnan B.S, Mercy Paul, A. Unnikrishnan, “Generation of Oct trees of solids from Revolutions and Sweep”, J Informatics and Computer Science, Comp. Society of India, OCT 1994.

11. P. Sojanlal, A. Unnikrishnan, K Paulose Jacob, “Generation of Oct tree from CAT Scan slices”, Proc. NET –X, 97, MAY 1997, Comp. Society of India, pp 146 – 157.

12. P. Sojanlal, A. Unnikrishnan, K Paulose Jacob, “Parallel Implementation of Oct tree generation algorithm”, Proc. IEEE ICIP, OCT, 04-07, 1998 Chicago, Illinois, WP 11.09

13. Sheila Karipel, A. Unnikrishnan, “ Simulation of Sonar display Systems”, Proc. UDT 2000, Sydney

14. P. Sojanlal, A. Unnikrishnan, K Paulose Jacob,” Generation of Oct trees from CAT scan slices with Reduced Information Loss”, Proc. IASTED, Visualization, Imaging and Image Processing, SEP 03-05, 2001, Marbella, Spain, pp366-370

15. Roshen Jacob, Mohan P. Mathew, A. Unnikrishnan, Manju Manuel, Essy Samuel, Leesha Paul, Girish Balakrishnan, “ Wavelet transform based de noising of Signals: Krim’s Thresholding Scheme and Optimum Wavelet Construction using genetic algorithm”, Proc. Int. Conference on Sonar-Sensors and Systems ( ICONS – 2002), DEC 11 – 13, 2002, NPOL, Kochi, pp221 – 228

16. Indu.P.Nair, A.Unnikrishnan “Some practical Issues in the Implementation of Runge – Kutta Neural Network”, Proc. Int. Conference on Sonar-Sensors and Systems ( ICONS – 2002), DEC 11 – 13, 2002, NPOL, Kochi, pp297 – 304.

17. Indu P Nair, A. Unnikrishnan, MP Nandakumar, “Comparison of Runge-Kutta Neural Network and Support vector machines for non liner system identification”, Proc. National Symposium on Power Conversion and Industrial Control (PCIC 2003), JAN 03-04, 2003, Palakkad, Kerala, ID 08, 2.49

18. Beena M Varghese, KH Kochaleema, A. Unnikrishnan, “Detection of Target maneuver”, Proc. National Symposium on Power Conversion and Industrial Control (PCIC 2003), JAN 03-04, 2003, Palakkad,Kerala, CA 08, 5.46