Qualification: 
Ph.D, MPhil
usha@am.amrita.edu

Dr. Usha Kumari joined Amrita in 2003. She has 18 years of experience in teaching and research. She received her Ph. D. in Mathematics from Cochin University of Science and Technology in 1997. She has an M. Phil. in Statistics from Kerala University. She has qualified CSIR-UGC JRF. Her field of interests include Probability Theory, Stochastic Processes, Operations Research and Statistics.

Dr. Usha is a member of Undergraduate Board of Studies and Board of Studies of Integrated M. Sc. in Mathematics and Physics at Amrita. She has 20 international publications to her credit and 4 papers published in the proceedings and has conducted two national-level workshops, one on Stochastic Processes in 2008 which was sponsored by National Board for Higher Mathematics, and another on Linear Algebra in 2005. She has served as a referee for the Journal of Applied Mathematics & Stochastic Analysis, the Asia Pacific Journal of Operational Research, and the International Journal of Information & Management Systems. She has also presented papers at many international conferences and has been invited to deliver numerous talks.

Dr. Usha ’s academic career started at Union Christian College where she was a lecturer from 1995 to 1998. She subsequently worked as a Research Associate at the Indian Institute of Science, Bangalore (1998-1999) and at Cochin University of Science and Technology (1999-2003) prior to joining Amrita.

Publications

Publication Type: Conference Paper

Year of Publication Publication Type Title

2014

Conference Paper

Dr. Usha Kumari P. V., “A retrial Inventory system with an unreliable server”, in International Conference on Operational Research, Sri Venkateswara University,Tirupati, A.P, 2014.

2008

Conference Paper

Dr. Maneesha V. Ramesh and Dr. Usha Kumari P. V., “Threshold Based Data Aggregation Algorithm to Detect Rainfall Induced Landslides”, in Proceedings of the 2008 International Conference on Wireless Networks (ICWN’08), 2008, pp. 255-261.

2000

Conference Paper

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “Single arrival bulk service single departure queue”, in The Int. Conference on Stochastic processes and their applications, Anna University, Madras, 2000.

1998

Conference Paper

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “k-out-of-n system with general repair, The N–policy”, in Proc. II International symposium on Semi-Markov processes and their applications, Compiegne, France, Dec, 1998.

1995

Conference Paper

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On the queueing system MD/GD/ α”, in International conference on Stochastic process and computer applications., PSG College of Technology, Coimbatore, 1995.

1994

Conference Paper

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On the GIX(u) /G/ α queue”, in 3rd Ramanujam Symp. On Stochastic Processes and their Applications, Ramamijan institute, Madras, 1994.

1994

Conference Paper

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On an infinite server queue in discrete time”, in 3rd Ramanujam symp. On stochastic processes and their applications, Ramanujan instituterMadras, 1994.

Publication Type: Conference Proceedings

Year of Publication Publication Type Title

2008

Conference Proceedings

Dr. Usha Kumari P. V., “ Threshold Based Data Aggregation Algorithm to Detect Rainfall in land Slide”, international Conference on Wireless Networks, vol. 1. pp. 255-261, 2008.[Abstract]


Landslides are one of the environmental disasters that cause massive destruction of human life and infrastructure. Real time monitoring of a landslide prone areas are necessary to issue fore warning. To accomplish real time monitoring, massive amount of data have to be collected and analyzed within a short span of time. This work has developed a method for effective data collection and aggregation by implementing threshold alert levels. The sampling rates of threshold alert levels will determine amount of data collected and aggregated which will reduce the power consumption by each wireless sensor nodes. This work also helps to determine the appropriate sampling rates for each threshold level, and the expected number of data packets in the queue. The time delay in receiving the data packet at the analysis station can be determined by using the value of expected number of data packets in the queue.

More »»

Publication Type: Journal Article

Year of Publication Publication Type Title

2007

Journal Article

Dr. Usha Kumari P. V., “On (s, S) inventory system with random lead time and repeated demands”, International Journal of Stochastic Analysis, vol. 2006, 2007.

2005

Journal Article

Dr. Usha Kumari P. V., “On the queueing system Mn x /GD/ α”, Bull. Of Pure and Applied Sciences, vol. 14E, no. 2, pp. 115-125, 2005.

2004

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “< i> k-out-of-< i> n system with repair: the max (< i> N,< i> T) policy”, Performance Evaluation, vol. 57, pp. 221–234, 2004.

2002

Journal Article

A. Krishnamoorthy and Dr. Usha Kumari P. V., “GI/M/1/1 queue with finite retrials and finite orbits”, 2002.

2002

Journal Article

A. Krishnamoorthy, Dr. Usha Kumari P. V., and Lakshmy, B., “k-out-of-n-system with repair: The N-policy”, Asia Pacific Journal of Operational Research, vol. 19, pp. 47–62, 2002.

2001

Journal Article

A. Krishnamoorthy and Dr. Usha Kumari P. V., “< i> k-out-of-< i> n:< i> G system with repair: the< i> D-policy”, Computers & Operations Research, vol. 28, pp. 973–981, 2001.

2001

Journal Article

S. R. Chakravarthy, Krishnamoorthy, A., and Dr. Usha Kumari P. V., “A k-out-of-n reliability system with an unreliable server and phase type repairs and services: the (N, T) policy”, International Journal of Stochastic Analysis, vol. 14, pp. 361–380, 2001.

2000

Journal Article

A. Krishnamoorthy and Dr. Usha Kumari P. V., “A queueing system with single arrival bulk service and single departure”, Mathematical and computer modelling, vol. 31, pp. 99–108, 2000.

2000

Journal Article

A. Krishnamoorthy and Dr. Usha Kumari P. V., “Queues with customers requiring random number of servers”, IAPQR TRANSACTIONS, vol. 25, pp. 97–106, 2000.

1999

Journal Article

A. Krishnamoorthy and Dr. Usha Kumari P. V., “Reliability of ak-out-of-n system with repair and retrial of failed units”, Top, vol. 7, pp. 293–304, 1999.

1998

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On a bulk arrival bulk service infinite service queue”, Stochastic analysis and applications, vol. 16, pp. 585–595, 1998.

1998

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy*, A., “On the queueing system”, Optimization, vol. 43, pp. 157–168, 1998.

1998

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “The queueing system M/MX (R)/infinity”, ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH, vol. 15, pp. 17–28, 1998.

1998

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On the queueing system GID xn/G/α with Markov dependent batch arrivals”, Opsearch, vol. 35, pp. 1-12, 1998.

1996

Journal Article

A. Krishnamoorthy and Dr. Usha Kumari P. V., “On some infinite server queues in discrete time”, International journal of information and management sciences, vol. 7, pp. 71–78, 1996.

1995

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “The queueing system BDG D∞∗∗”, Optimization, vol. 34, pp. 185–193, 1995.

1995

Journal Article

Dr. Usha Kumari P. V., Krishnamoorthy, A., and Kashyap, B. R. K., “On GIX (u)/G/∞ queue”, International journal of information and management sciences, vol. 6, pp. 59–67, 1995.

1994

Journal Article

Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On an Infinite Server Queue”, OPSEARCH-NEW DELHI-, vol. 31, pp. 240–240, 1994.

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