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.
Year : 2024
Cite this Research Publication : P V Ushakumari and P R Vyshnavi, "On a Queueing System with Encouraged Arrivals and Service Switches", ICAPSM-2024
Year : 2024
Cite this Research Publication : P V Ushakumari and P R Vyshnavi, "A Perishable Inventory System with Random Common Lifetime, N-Policy and Lost Sales" , ICAPSM-2024
Year : 2024
Cite this Research Publication : P.V.Ushakumari, k-Out-of-n system with repair under single/bulk service, Degres Journal, Volume 9, Issue 7, 2024, ISSN NO:0376-8163
Publisher : Degres Journal
Year : 2023
Cite this Research Publication : Dissa, S., Ushakumari, P.V. Two commodity perishable queueing inventory system with random common lifetime of commodities and positive lead time. OPSEARCH (2023). https://doi.org/10.1007/s12597-023-00707-3
Publisher : SpringerLink
Year : 2023
Cite this Research Publication : S. Dissa, P.V. Ushakumari, Two commodity queueing inventory system with random common lifetime, two demand classes and pool of customers, Heliyon 9, 2023
Year : 2022
Cite this Research Publication : G Sreelekshmi, GS Kumar, PV Ushakumari, Application of Queueing Model to an Outpatient Flow in a Multi-Speciality Hospital, Journal of Pharmaceutical Negative Results, 332-337, 2022.
Year : 2021
Cite this Research Publication : Dr. Usha Kumari P. V., “On a Two Server Reliability System with One Server Idle Below a Threshold”, International Journal of Mathematics in Operational Research (IJMOR), vol. 18, no. 4, 2021.
Publisher : International Journal of Mathematics in Operational Research
Year : 2020
Cite this Research Publication : Dr. Usha Kumari P. V. and S Krishna, D., “Optimal Server Time Management in a Single Server Queue”, International Journal of Advanced Research in Engineering and Technology, vol. 11, no. 6, 2020.
Publisher : International Journal of Advanced Research in Engineering and Technology
Year : 2020
Cite this Research Publication : Dr. Usha Kumari P. V., “A stochastic inventory system with two modes of service under N-policy”, Journal of Interdisciplinary Mathematics, vol. 23, no. 1, pp. 127–143, 2020.
Publisher : Journal of Interdisciplinary Mathematics, Taylor & Francis
Year : 2020
Cite this Research Publication : Simi Surendran, Dr. Maneesha V. Ramesh, and Dr. Usha Kumari P. V., “Queue size estimation of nodes in a heterogeneous ocean network with multiple priority traffic”, International Journal of Vehicle Information and Communication Systems, vol. 5, no. 1, pp. 26–40, 2020.
Publisher : International Journal of Vehicle Information and Communication Systems, Inderscience Publishers (IEL)
Year : 2020
Cite this Research Publication : S. R., Sathidevi C., and Dr. Usha Kumari P. V., “Routing Problem In Transportation Of Milk In A Diary-A Case Study”, International journal of Scientific & Technology Research, vol. 9, no. 3, 2020.
Publisher : International journal of Scientific & Technology Research
Year : 2018
Cite this Research Publication : Dr. Usha Kumari P. V., “Reliability of k out of- n system with repair and Two modes of service under N-policy”, International Journal of Pure and Applied Mathematic, vol. 119, no. 16, pp. 5189-5196, 2018.
Publisher : International Journal of Pure and Applied Mathematic
Year : 2017
Cite this Research Publication : Dr. Usha Kumari P. V., “A retrial inventory system with an unreliable server”, Int. J. Mathematics in Operational Research, vol. 10, no. 2 , 2017.
Publisher : Int. J. Mathematics in Operational Research
Year : 2017
Cite this Research Publication : P. Rekha, Dr. Maneesha V. Ramesh, P. Venkat Rangan, Dr. Usha Kumari P. V., and Hemalatha, T., “Energy Efficient Data Acquisition Techniques Using Context Aware Sensing for Landslide Monitoring Systems”, IEEE Sensors Journal, vol. 17, pp. 6006-6018, 2017
Publisher : IEEE Sensors Journal.
Year : 2016
Cite this Research Publication : P. Rekha, Dr. Maneesha V. Ramesh, Dr. Usha Kumari P. V., and P. Venkat Rangan, “Energy Sustenance in Context Aware Landslide Monitoring systems”, Sensys 2015, InfoComm2016, 2016.
Publisher : Sensys 2015, InfoComm2016.
Year : 2007
Cite this Research Publication : Dr. Usha Kumari P. V., “On (s, S) inventory system with random lead time and repeated demands”, International Journal of Stochastic Analysis, vol. 2006, pp. 1-22, 2007.
Publisher : International Journal of Stochastic Analysis
Year : 2004
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “k-out-of-n-system with repair: The Max (N, T) Policy”, Performance Evaluation, vol. 57, no. 2, pp. 221–234, 2004.
Publisher : Elsevier
Year : 2002
Cite this Research Publication : 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.
Publisher : NATIONAL UNIVERSITY OF SINGAPORE
Year : 2002
Cite this Research Publication : A. Krishnamoorthy and Dr. Usha Kumari P. V., “GI/M/1/1 queue with finite retrials and finite orbits”, stochastic analysis and applications, vol. 20, no. 2, pp. 357–374, 2002.
Publisher : Taylor & Francis
Year : 2001
Cite this Research Publication : A. Krishnamoorthy and Dr. Usha Kumari P. V., “k-out-of-n: G system with repair: the D-policy”, Int.Jl. of Computers and Operations Research, vol. 28, no. 10, pp. 973 - 981, 2001.
Publisher : Int.Jl. of Computers and Operations Research, Pergamon Press
Year : 2001
Cite this Research Publication : 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”, Journal of Applied Mathematics and Stochastic Analysis, vol. 14, pp. 361–380, 2001.
Publisher : International Journal of Stochastic Analysis
Year : 2000
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “Single arrival bulk service single departure queue”, Mathematical and Computer Modeling, vol. 31, pp. 99-108, 2000.
Publisher : Mathematical and Computer Modeling,
Year : 2000
Cite this Research Publication : A. Krishnamoorthy and Dr. Usha Kumari P. V., “Queues with customers requiring random number of servers”, IAPQR TRANSACTIONS, vol. 25, pp. 97–106, 2000.
Publisher : IAPQR TRANSACTIONS, INDIAN ASSOCIATION FOR PRODUCTIVITY, QUALITY & RELIABILITY
Year : 2000
Cite this Research Publication :
Publisher : Elsevier
Year : 1999
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On the queueing system M/MX®/ ∞”, Asia Pacific Jl. Of Operational Research, vol. 15, no. 1, pp. 17-28, 1998.
Publisher : Asia Pacific Jl. Of Operational Research
Year : 1999
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “k-out-of-n-system with repair and retrial”, Spanish Journal of OR, vol. 7, no. 2, pp. 293-304., 1999.
Publisher : Spanish Journal of OR
Year : 1999
Cite this Research Publication : A. Krishnamoorthy and Ushakumari, P. V., “Reliability of ak-out-of-n system with repair and retrial of failed units”, Top, vol. 7, pp. 293–304, 1999.
Publisher : Top, Springer
Year : 1998
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy*, A., “On the queueing system GIDX/MDR/ ∞”, Optimization, vol. 43, pp. 157–168, 1998.
Publisher : Taylor & Francis
Year : 1998
Cite this Research Publication : P. V. Ushakumari and Krishnamoorthy, A., “The queueing system M/MX (R)/infinity”, ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH, vol. 15, pp. 17–28, 1998.
Publisher : ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH, NATL UNIV SINGAPORE, INDUSTRIAL & SYSTEMS ENG DEPT, 10 KENT RIDGE CRESCENT,
Year : 1998
Cite this Research Publication : 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.
Publisher : Opsearch
Year : 1998
Cite this Research Publication : 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.
Publisher : Stochastic analysis and applications
Year : 1996
Cite this Research Publication : A. Krishnamoorthy and Ushakumari, P. V., “On some infinite server queues in discrete time”, International journal of information and management sciences, vol. 7, pp. 71–78, 1996.
Publisher : Tamkang University Press
Year : 1996
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On an infinite server queue in discrete time”, Int. Jl. of Inf.and Mgmt. Sciences, vol. 7, no. 3, pp. 71-77., 1996.
Publisher : Int. Jl. of Inf.and Mgmt. Sciences
Year : 1995
Cite this Research Publication : Dr. Usha Kumari P. V., Krishnamoorthy, A., and Kashyap, B. R. K., “On the GIX(u) /G/ ∞ queue”, Int. Jl. of Inf. and Mgmt. Sciences, vol. 6, no. 3, pp. 59-67, 1995.
Publisher : Int. Jl. of Inf. and Mgmt. Sciences
Year : 1995
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On the queueing system BD/GD/ ∞”, Optimization, vol. 34, pp. 185-193., 1995.
Publisher : Optimization
Year : 1995
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy*, A., “On the queueing system”, Optimization, vol. 43, pp. 157–168, 1998.
Publisher : International conference on Stochastic process and computer applications.
Year : 1995
Cite this Research Publication : P. V. Ushakumari and Krishnamoorthy, A., “The queueing system BDG D∞∗∗”, Optimization, vol. 34, pp. 185–193, 1995.
Publisher : Taylor & Francis
Year : 1995
Cite this Research Publication : P. V. Ushakumari, 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.
Publisher : Tamkang University Press
Year : 1995
Cite this Research Publication : 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, 1995.
Publisher : Bull. Of Pure and Applied Sciences
Year : 1994
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On an Infinite Server Queue”, Opsearch, vol. 31, pp. 240–240, 1994.
Publisher : OPSEARCH
Year : 2024
Cite this Research Publication : Shankar, A.G., Anjali, S and Ushakumari, P.V., Comparative Study of Performances of Banks Using Markov Chain Model and LSTM, 4th International Conference on Advances in Electrical, Computing, Communication and Sustainable Technologies, ICAECT 2024, IEEE
Publisher : IEEE
Year : 2021
Cite this Research Publication : A. M. Nair, Sreelatha K. S., and Dr. Usha Kumari P. V., “Application of Queuing Theory to a Railway ticket window”, in 2021 International Conference on Innovative Practices in Technology and Management (ICIPTM), 2021.
Publisher : 2021 International Conference on Innovative Practices in Technology and Management (ICIPTM)
Year : 2014
Cite this Research Publication : 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.
Publisher : International Conference on Operational Research
Year : 2008
Cite this Research Publication : 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.
Publisher : international Conference on Wireless Networks
Year : 2008
Cite this Research Publication : 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.
Publisher : Proceedings of the 2008 International Conference on Wireless Networks (ICWN’08).
Year : 2000
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “Single arrival bulk service single departure queue”, in Proceedings of the Int. Conference on Stochastic Processes and their Applications, Anna University, Madras, 2000.
Publisher : Anna University, Madras
Year : 1998
Cite this Research Publication : 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, 1998.
Publisher : Compiegne
Year : 1995
Cite this Research Publication : Dr. Usha Kumari P. V. and Krishnamoorthy, A., “On the queueing system MD/GD/ ∞”, in International Conference on Stochastic Process and Computer Applications., PSG College of Technology, Coimbatore, 1995.
Publisher : PSG College of Technology, Coimbatore
Year : 1994
Cite this Research Publication : 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.
Publisher : Ramanujan institute Madras
Year : 1994
Cite this Research Publication : 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.
Publisher : Ramamijan institute, Madras
| Cochin University of Science and Technology, Cochin | Ph.D. | 1997 | Probability theory, Stochastic processes and Operations Research |
| University of Kerala | MPhil | 1992 | Statistics |
| University of Kerala | MSc | 1989 | Statistics |
| University of Kerala | BSc | 1987 | Statistics |
|
University / College |
Designation |
Period |
| U.C. College, Aluva | Lecturer | 1995 Aug.- 1998 March |
| Cochin University of Science and Tech. | Guest faculty in the Under Graduate Studies in Engineering | April 1998-Aug.1998 |
| Indian Institute of Science, Bangalore | Research Associate | 1998 Aug- 1999Apr. |
| Cochin University of Science and Tech. | Research Associate | 1999May-2003 May |
| Amrita Vishwa Vidyapeetham, Amritapuri Campus | Lecturer | 2003 June-2004 May |
| Amrita Vishwa Vidyapeetham, Amritapuri Campus | Senior Lecturer | 2004 June –2005 October |
| Amrita Vishwa Vidyapeetham, Amritapuri Campus | Assistant Professor | 2005 November-2007 June |
| Amrita Vishwa Vidyapeetham, Amritapuri Campus | Associate Professor | 2007 July-2019 June |
| Amrita Vishwa Vidyapeetham, Amritapuri Campus | Professor | 2019 July-till date |
Positions held at Amrita Vishwa Vidyapeetham
AMRITA Seed Grant approval for the project titled ‘Stochastic Modelling and Analysis of Connectivity Reliability in 6G IoT Networks using k –out of- n systems, Sanction order : ASG2022109 for the duration of TWO years.
