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Balasubramaniam P. Twenty-Eight AM Ismail Oration Healing in Surgery. Malays Orthop J 2022; 16:1-5. [PMID: 36589371 PMCID: PMC9791897 DOI: 10.5704/moj.2211.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- P Balasubramaniam
- College of Surgeons, Academy of Medicine of Malaysia, Kuala Lumpur, Malaysia
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2
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Pinto L, Gopalan S, Balasubramaniam P. Quantification on the Generalization Performance of Deep Neural Network with Tychonoff Separation Axioms. Inf Sci (N Y) 2022. [DOI: 10.1016/j.ins.2022.06.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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3
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Padmaja N, Balasubramaniam P. Results on passivity and design of passive controller for fuzzy neural networks with additive time-varying delays. Soft comput 2022. [DOI: 10.1007/s00500-022-07353-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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4
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Aravind RV, Balasubramaniam P. An exponential stabilization criterion for switched delayed interval type-2 fuzzy systems under admissible edge-dependent average dwell time mechanism. Inf Sci (N Y) 2022. [DOI: 10.1016/j.ins.2021.12.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Jebadass JR, Balasubramaniam P. Low contrast enhancement technique for color images using interval-valued intuitionistic fuzzy sets with contrast limited adaptive histogram equalization. Soft comput 2022. [DOI: 10.1007/s00500-021-06539-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Rajammal TSJ, Balasubramaniam P, Kaledhonkar MJ. Assessment of groundwater quality in Kanyakumari district, Tamil Nadu, using ionic chemistry. CURR SCI INDIA 2021. [DOI: 10.18520/cs/v121/i5/676-684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Aravind RV, Balasubramaniam P. Stochastic stability of fractional-order Markovian jumping complex-valued neural networks with time-varying delays. Neurocomputing 2021. [DOI: 10.1016/j.neucom.2021.01.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Suganthi N, Balasubramaniam P. Perceived Social Empowerment Status of the Medicinal Plant Growers. JPRI 2020. [DOI: 10.9734/jpri/2020/v32i1330590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The indigenous systems of medicine in India are Ayurveda, Siddha and Unani which is practised from ancient times. India and China are the two major countries having 40 per cent of the global diversity and are known as the house of medicinal plants. Most of the medicinal plants are gathered from the forest areas to meet the demand of the medicinal profession, which becomes exhaustible if overused and sustainable when used with care and wisdom. Hence, it is important to take efforts to grow them as commercial crops. Several theoretical concepts to measure empowerment of farmers have been identified and proposed world wide, very few studies have been conducted to measure their empowerment. This paper presents the Perceived Social Empowerment status of medicinal plant growers.
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Uchimahali P, Balasubramaniam P. Work - Life Balance of Women Employees of Commercial Banks in Tirunelveli Town. International Journal of Management Studies 2019. [DOI: 10.18843/ijms/v6i1(1)/10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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10
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Sathiyaraj T, Balasubramaniam P. Controllability of fractional higher order stochastic integrodifferential systems with fractional Brownian motion. ISA Trans 2018; 82:107-119. [PMID: 29198978 DOI: 10.1016/j.isatra.2017.11.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/23/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
This paper presents a new set of sufficient conditions for controllability of fractional higher order stochastic integrodifferential systems with fractional Brownian motion (fBm) in finite dimensional space using fractional calculus, fixed point technique and stochastic analysis approach. In particular, we discuss the complete controllability for nonlinear fractional stochastic integrodifferential systems under the proved result of the corresponding linear fractional system is controllable. Finally, an example is presented to illustrate the efficiency of the obtained theoretical results.
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Affiliation(s)
- T Sathiyaraj
- Department of Mathematics, The Gandhigram Rural Institute - Deemed University, Gandhigram 624302, Dindigul, Tamil Nadu, India.
| | - P Balasubramaniam
- Department of Mathematics, The Gandhigram Rural Institute - Deemed University, Gandhigram 624302, Dindigul, Tamil Nadu, India.
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11
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Muthukumar P, Balasubramaniam P, Ratnavelu K. Sliding mode control for generalized robust synchronization of mismatched fractional order dynamical systems and its application to secure transmission of voice messages. ISA Trans 2018; 82:51-61. [PMID: 28755926 DOI: 10.1016/j.isatra.2017.07.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 03/04/2017] [Accepted: 07/04/2017] [Indexed: 06/07/2023]
Abstract
This paper proposes a generalized robust synchronization method for different dimensional fractional order dynamical systems with mismatched fractional derivatives in the presence of function uncertainty and external disturbance by a designing sliding mode controller. Based on the proposed theory of generalized robust synchronization criterion, a novel audio cryptosystem is proposed for sending or sharing voice messages secretly via insecure channel. Numerical examples are given to verify the potency of the proposed theories.
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Affiliation(s)
- P Muthukumar
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamil Nadu, India; Institute of Mathematical Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - P Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamil Nadu, India.
| | - K Ratnavelu
- Institute of Mathematical Sciences, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Madhavan R, Kannabiran BP, Nithya AM, Kani J, Balasubramaniam P, Shanmugakumar S. Pediatric brain tumors: An analysis of 5 years of data from a tertiary cancer care center, India. Indian J Cancer 2018; 53:562-565. [PMID: 28485351 DOI: 10.4103/ijc.ijc_66_17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Pediatric brain tumors are the most common solid tumors in children and a leading cause of mortality and morbidity in children worldwide. Even though there are enough data about the epidemiology of pediatric brain tumors in western population, there are only a few reports from developing countries like India. AIMS To study the epidemiological patterns of brain tumors in children, to study the patterns of care, and to assess the treatment response. MATERIALS AND METHODS A retrospective epidemiological approach is used. The records of children <18 years registered in our department from August 2006 to July 2011 diagnosed as primary brain tumors are selected. Data regarding age, sex, site of the tumor, clinical features, histology, treatment plan, and treatment response are collected. The World Health Organization classification of neoplasms was adopted. RESULTS Of 250 cases, females (57%) slightly outnumbered males. The present study revealed that astrocytoma (52%) is the most common brain tumor in childhood. Surgery was the main modality of treatment. Chemotherapy was given to 16% of patients. Even though radiation therapy was offered to 74% of patients, only 42% completed radiotherapy. There was subjective clinical improvement in 68% of patient population after treatment. CONCLUSIONS This is the second study from Tamil Nadu that deals with epidemiology of brain tumors. Multimodality management including surgery, chemotherapy, and radiation therapy remains the cornerstone in the management of pediatric brain tumors.
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Affiliation(s)
- R Madhavan
- Department of Radiation Oncology, Madras Medical College, Chennai, Tamil Nadu; Department of Radiation Oncology, Amrita Institute of Medical Sciences, Amrita University, Kochi, Kerala, India
| | - B P Kannabiran
- Department of Radiation Oncology, Madras Medical College, Chennai, Tamil Nadu, India
| | - A M Nithya
- Department of Radiation Oncology, Madras Medical College, Chennai, Tamil Nadu, India
| | - J Kani
- Department of Radiation Oncology, Madras Medical College, Chennai, Tamil Nadu, India
| | - P Balasubramaniam
- Department of Radiation Oncology, Madras Medical College, Chennai, Tamil Nadu, India
| | - S Shanmugakumar
- Department of Radiation Oncology, Madras Medical College, Chennai, Tamil Nadu, India
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Lakshmanan S, Lim CP, Nahavandi S, Prakash M, Balasubramaniam P. Dynamical Analysis of the Hindmarsh-Rose Neuron With Time Delays. IEEE Trans Neural Netw Learn Syst 2017; 28:1953-1958. [PMID: 27244752 DOI: 10.1109/tnnls.2016.2557845] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This brief is mainly concerned with a series of dynamical analyses of the Hindmarsh-Rose (HR) neuron with state-dependent time delays. The dynamical analyses focus on stability, Hopf bifurcation, as well as chaos and chaos control. Through the stability and bifurcation analysis, we determine that increasing the external current causes the excitable HR neuron to exhibit periodic or chaotic bursting/spiking behaviors and emit subcritical Hopf bifurcation. Furthermore, by choosing a fixed external current and varying the time delay, the stability of the HR neuron is affected. We analyze the chaotic behaviors of the HR neuron under a fixed external current through time series, bifurcation diagram, Lyapunov exponents, and Lyapunov dimension. We also analyze the synchronization of the chaotic time-delayed HR neuron through nonlinear control. Based on an appropriate Lyapunov-Krasovskii functional with triple integral terms, a nonlinear feedback control scheme is designed to achieve synchronization between the uncontrolled and controlled models. The proposed synchronization criteria are derived in terms of linear matrix inequalities to achieve the global asymptotical stability of the considered error model under the designed control scheme. Finally, numerical simulations pertaining to stability, Hopf bifurcation, periodic, chaotic, and synchronized models are provided to demonstrate the effectiveness of the derived theoretical results.
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14
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Ananthi VP, Balasubramaniam P, Raveendran P. A thresholding method based on interval-valued intuitionistic fuzzy sets: an application to image segmentation. Pattern Anal Appl 2017. [DOI: 10.1007/s10044-017-0622-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Lakshmanan S, Lim C, Prakash M, Nahavandi S, Balasubramaniam P. Neutral-type of delayed inertial neural networks and their stability analysis using the LMI Approach. Neurocomputing 2017. [DOI: 10.1016/j.neucom.2016.12.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Prakash M, Balasubramaniam P, Lakshmanan S. Synchronization of Markovian jumping inertial neural networks and its applications in image encryption. Neural Netw 2016; 83:86-93. [DOI: 10.1016/j.neunet.2016.07.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 05/23/2016] [Accepted: 07/01/2016] [Indexed: 11/15/2022]
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17
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Ananthi VP, Balasubramaniam P. A new thresholding technique based on fuzzy set as an application to leukocyte nucleus segmentation. Comput Methods Programs Biomed 2016; 134:165-177. [PMID: 27480741 DOI: 10.1016/j.cmpb.2016.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 05/19/2016] [Accepted: 07/01/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND AND OBJECTIVES The main aim of this paper is to segment leukocytes in blood smear images using interval-valued intuitionistic fuzzy sets (IVIFSs). Generally, uncertainties occur in terms of vagueness through brightness levels of image. Processing of such uncertain images can be efficiently handled by using fuzzy sets, particularly IVIFSs. METHODS Logarithmic membership function is utilized for computing membership values corresponding to intensities of the pixel. Non-membership function of IVIFS is constructed by using Yager generating function. By varying parameters, 256 IVIFSs are generated. An IVIFS is selected from 256 IVIFSs having maximizing ultrafuzziness along with varying threshold. Threshold is determined by finding an IVIFS with maximum similarity between ideal segmented and segmented results obtained from the proposed method. RESULTS Quantitatively, the segmented images are evaluated using precision-recall, receiver operator characteristic curves, Jaccard coefficient and measure for structural similarity index along with the time taken for segmenting nucleus, and their results are compared with results of existing methods. Performance measures reveal that the proposed method seems to segment leukocytes better than other comparable methods. CONCLUSIONS Segmentation of leukocytes using the proposed method helps the analyst in differentiating various types of leukocytes and in the determination of leukocyte count, and the counting is essential in finding out diseases related to reduction or surplus quantity of these cells.
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Affiliation(s)
- V P Ananthi
- Department of Mathematics, Gandhigram Rural Institute-Deemed University, Gandhigram 624 302, Tamilnadu, India.
| | - P Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute-Deemed University, Gandhigram 624 302, Tamilnadu, India.
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Revathi VM, Balasubramaniam P. Delay decomposition approach to [Formula: see text] filtering analysis of genetic oscillator networks with time-varying delays. Cogn Neurodyn 2016; 10:135-147. [PMID: 27066151 PMCID: PMC4805683 DOI: 10.1007/s11571-015-9371-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 12/15/2015] [Accepted: 12/24/2015] [Indexed: 11/29/2022] Open
Abstract
In this paper, the [Formula: see text] filtering problem is treated for N coupled genetic oscillator networks with time-varying delays and extrinsic molecular noises. Each individual genetic oscillator is a complex dynamical network that represents the genetic oscillations in terms of complicated biological functions with inner or outer couplings denote the biochemical interactions of mRNAs, proteins and other small molecules. Throughout the paper, first, by constructing appropriate delay decomposition dependent Lyapunov-Krasovskii functional combined with reciprocal convex approach, improved delay-dependent sufficient conditions are obtained to ensure the asymptotic stability of the filtering error system with a prescribed [Formula: see text] performance. Second, based on the above analysis, the existence of the designed [Formula: see text] filters are established in terms of linear matrix inequalities with Kronecker product. Finally, numerical examples including a coupled Goodwin oscillator model are inferred to illustrate the effectiveness and less conservatism of the proposed techniques.
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Affiliation(s)
- V. M. Revathi
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram, Tamilnadu 624 302 India
| | - P. Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram, Tamilnadu 624 302 India
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Peera SKPG, Balasubramaniam P, Mahendran PP. Effect of silicate solubilizing bacteria and fly ash on silicon uptake and yield of rice under lowland ecosystem. ACTA ACUST UNITED AC 2016. [DOI: 10.31018/jans.v8i1.746] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A field experiment was conducted in sandy loam soils of eastern farm, Agricultural Engineering College and Research Institute, Kumulur, Tamil Nadu, India to study the effect of silicon on yield and uptake of rice (var. BPT 5204) during Kharif season of 2010-11 by taking the treatment combinations based on graded levels of Fly Ash (FA), Silicate Solubilizing Bacteria (SSB) and Farm Yard Manure (FYM) at fixed fertilizer schedule. The experimental soil (0-15 cm) had pH 7.22; organic C 1.4 %; available Si 66.0 mg kg-1; available N 266.0 kgha-1; available P 14.42 kgha-1 and available K 107.50 kgha-1. The results of graded levels of FA show that all the growth and yield attributes were significantly influenced by silicon uptake. The mean silicon uptake at panicle initiation, straw and grain at harvest varied from 53.8 - 98.7, 105.5 - 197.2 and 21.4- 62.3 kgha-1 respectively, in rice. Number of filled grains per panicle and grain yield displayed conspicuous relationships with content of Si in grains. The highest mean grain yield of 3622 kg ha-1 was recorded by the addition of SSB+FYM followed by FYM (3530 kg ha-1), SSB (3310 kg ha-1) and control (3240 kg ha-1). The combined application of 25 t ha-1 FA with SSB+FYM was recorded the highest grain yield of 3710 kg ha-1 which was 16.3 per cent moreover yield of control. The results further show that 25 t ha-1 FA and SSB+FYM have been proved to be superior treatments for best management of silicon in coastal loamy sand soils under irrigated rice ecosystem.
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20
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Jarina Banu L, Balasubramaniam P. Robust stability analysis for discrete-time neural networks with time-varying leakage delays and random parameter uncertainties. Neurocomputing 2016. [DOI: 10.1016/j.neucom.2015.11.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Jarina Banu L, Balasubramaniam P. Admissibility analysis for discrete-time singular systems with randomly occurring uncertainties via delay-divisioning approach. ISA Trans 2015; 59:354-362. [PMID: 26428877 DOI: 10.1016/j.isatra.2015.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 07/28/2015] [Accepted: 09/05/2015] [Indexed: 06/05/2023]
Abstract
This paper deals with the problem of admissibility analysis for discrete-time singular system with time-delays. The uncertainties occurring in the system parameters are assumed to be random. By constructing Lyapunov functional, sufficient delay-dependent stochastic admissibility conditions are established via delay divisioning approach in terms of linear matrix inequalities (LMIs), which can be easily checked by utilizing the numerically efficient Matlab LMI toolbox. Numerical examples and their simulation results are given to illustrate the effectiveness of the obtained theoretical results.
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Affiliation(s)
- L Jarina Banu
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram 624302, Tamil Nadu, India
| | - P Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram 624302, Tamil Nadu, India.
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Muralisankar S, Manivannan A, Balasubramaniam P. Mean square delay dependent-probability-distribution stability analysis of neutral type stochastic neural networks. ISA Trans 2015; 58:11-19. [PMID: 25862099 DOI: 10.1016/j.isatra.2015.03.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 10/15/2014] [Accepted: 03/14/2015] [Indexed: 06/04/2023]
Abstract
The aim of this manuscript is to investigate the mean square delay dependent-probability-distribution stability analysis of neutral type stochastic neural networks with time-delays. The time-delays are assumed to be interval time-varying and randomly occurring. Based on the new Lyapunov-Krasovskii functional and stochastic analysis approach, a novel sufficient condition is obtained in the form of linear matrix inequality such that the delayed stochastic neural networks are globally robustly asymptotically stable in the mean-square sense for all admissible uncertainties. Finally, the derived theoretical results are validated through numerical examples in which maximum allowable upper bounds are calculated for different lower bounds of time-delay.
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Affiliation(s)
- S Muralisankar
- School of Mathematics, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India.
| | - A Manivannan
- School of Mathematics, Madurai Kamaraj University, Madurai 625 021, Tamil Nadu, India.
| | - P Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Dindigul 624 302, Tamil Nadu, India.
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Abstract
Ever since HIV was first diagnosed in human, a great number of scientific works have been undertaken to explore the biological mechanisms involved in the infection and progression of the disease. This paper deals with stability and bifurcation analyses of mathematical model that represents the dynamics of HIV infection of thymus. The existence and stability of the equilibria are investigated. The model is described by a system of delay differential equations with logistic growth term, cure rate and discrete type of time delay. Choosing the time delay as a bifurcation parameter, the analysis is mainly focused on the Hopf bifurcation problem to predict the existence of a limit cycle bifurcating from the infected steady state. Further, using center manifold theory and normal form method we derive explicit formulae to determine the stability and direction of the limit cycles. Moreover the mitosis rate r also plays a vital role in the model, so we fix it as second bifurcation parameter in the incidence of viral infection. Our analysis shows that, while both the bifurcation parameters can destabilize the equilibrium E* and cause limit cycles. Numerical simulations are performed to investigate the qualitative behaviors of the inherent model.
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Affiliation(s)
- M. Prakash
- Department of Mathematics, Gandhigram Rural Institute, Deemed University, Gandhigram 624 302, Tamil Nadu, India
| | - P. Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute, Deemed University, Gandhigram 624 302, Tamil Nadu, India
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Gaur S, Kumar SS, Balasubramaniam P. An analysis of medulloblastoma: 10 year experience of a referral institution in South India. Indian J Cancer 2015; 52:575-8. [DOI: 10.4103/0019-509x.178404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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25
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Syed Ali M, Balasubramaniam P, Zhu Q. Stability of stochastic fuzzy BAM neural networks with discrete and distributed time-varying delays. INT J MACH LEARN CYB 2014. [DOI: 10.1007/s13042-014-0320-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
In this paper, the dynamics of mathematical model for infection of thymus gland by HIV-1 is analyzed by applying some perturbation through two different types of delays such as in terms of Hopf bifurcation analysis. Further, the conditions for the existence of Hopf bifurcation are derived by evaluating the characteristic equation. The direction of Hopf bifurcation and stability of bifurcating periodic solutions are determined by employing the center manifold theorem and normal form method. Finally, some of the numerical simulations are carried out to validate the derived theoretical results and main conclusions are included.
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Affiliation(s)
- M. Prakash
- Department of Mathematics, Gandhigram Rural Institute, Deemed University, Gandhigram 624 302, Tamil Nadu, India
| | - P. Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute, Deemed University, Gandhigram 624 302, Tamil Nadu, India
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27
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Muthukumar P, Balasubramaniam P, Ratnavelu K. Synchronization and an application of a novel fractional order King Cobra chaotic system. Chaos 2014; 24:033105. [PMID: 25273185 DOI: 10.1063/1.4886355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this paper, we design a new three dimensional King Cobra face shaped fractional order chaotic system. The multi-scale synchronization scheme of two fractional order chaotic systems is described. The necessary conditions for the multi-scale synchronization of two identical fractional order King Cobra chaotic systems are derived through feedback control. A new cryptosystem is proposed for an image encryption and decryption by using synchronized fractional order King Cobra chaotic systems with the supports of multiple cryptographic assumptions. The security of the proposed cryptosystem is analyzed by the well known algebraic attacks. Numerical simulations are given to show the effectiveness of the proposed theoretical results.
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Affiliation(s)
- P Muthukumar
- Department of Mathematics, Gandhigram Rural Institute-Deemed University, Gandhigram 624 302, Tamilnadu, India
| | - P Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute-Deemed University, Gandhigram 624 302, Tamilnadu, India
| | - K Ratnavelu
- Faculty of Science, Institute of Mathematical Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia
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Lee TH, Lakshmanan S, Park JH, Balasubramaniam P. State estimation for genetic regulatory networks with mode-dependent leakage delays, time-varying delays, and Markovian jumping parameters. IEEE Trans Nanobioscience 2014; 12:363-75. [PMID: 25003168 DOI: 10.1109/tnb.2013.2294478] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
This paper considers the state estimation problem for Markovian jumping genetic regulatory networks (GRNs) with mode-dependent leakage and time-varying delays. In order to approximate the true concentrations of the mRNA and protein, the state estimator is designed using available measurement outputs. The GRNs are composed of N modes. The system switches from one mode to another according to a Markovian chain with known transition probabilities. Based on the Lyapunov functionals, including triple integral terms, some inequalities, and a time-varying delay partitioning approach, delay-dependent criteria which employ all upper bounds of time delays of each mode are obtained in terms of linear matrix inequalities (LMIs). This guarantees that the estimation error dynamics can be globally asymptotically stable from solutions of LMIs. Finally, a numerical example is presented to demonstrate the efficiency of the proposed estimation scheme.
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Balasubramaniam P, Jarina Banu L. Synchronization criteria of discrete-time complex networks with time-varying delays and parameter uncertainties. Cogn Neurodyn 2014; 8:199-215. [PMID: 24808929 DOI: 10.1007/s11571-013-9272-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 09/21/2013] [Accepted: 10/17/2013] [Indexed: 10/26/2022] Open
Abstract
This paper is pertained with the synchronization problem for an array of coupled discrete-time complex networks with the presence of both time-varying delays and parameter uncertainties. The time-varying delays are considered both in the network couplings and dynamical nodes. By constructing suitable Lyapunov-Krasovskii functional and utilizing convex reciprocal lemma, new synchronization criteria for the complex networks are established in terms of linear matrix inequalities. Delay-partitioning technique is employed to incur less conservative results. All the results presented here not only depend upon lower and upper bounds of the time-delay, but also the number of delay partitions. Numerical simulations are rendered to exemplify the effectiveness and applicability of the proposed results.
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Affiliation(s)
- P Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram, 624 302 Tamilnadu India
| | - L Jarina Banu
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram, 624 302 Tamilnadu India
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Prathima PT, Raveendran M, Kumar KK, Rahul PR, Kumar VG, Viswanathan R, Sundar AR, Malathi P, Sudhakar D, Balasubramaniam P. Differential regulation of defense-related gene expression in response to red rot pathogen Colletotrichum falcatum infection in sugarcane. Appl Biochem Biotechnol 2013; 171:488-503. [PMID: 23861092 DOI: 10.1007/s12010-013-0346-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 06/17/2013] [Indexed: 02/08/2023]
Abstract
Red rot is a serious disease of sugarcane caused by the fungus Colletotrichum falcatum imposing a considerable economic loss annually in all sugarcane-producing countries. In this study, we analyzed the early resistance response of sugarcane to red rot fungus by comparing the differences between control and inoculated stalk tissues. Differential display reverse transcription polymerase chain reaction (DD-RT-PCR) was employed to identify altered expression of genes in disease-resistant cv Co 93009, in response to pathogen infection. DD-RT-PCR identified 300 differentially expressed transcripts of which 112 were selected for further analysis. Cloning and sequence analysis of the isolated cDNA fragments resulted in functional categorization of these clones into five categories, of which the defense/stress/signaling group was the largest, with clones homologous to genes known to be actively involved in various pathogenesis-related functions in plant species. This group showed overexpression of several transcripts related to ethylene-mediated and jasmonic acid pathway of plant defense mechanisms. Of the 112 expressed sequence tags, validation of expression was carried out for five important genes whose role in plant defense mechanisms is well established. This is the first report of Colletotrichum-mediated gene regulation in sugarcane which has provided a set of candidate genes for detailed molecular dissection of signaling and defense responses in tropical sugarcane during the onset of red rot resistance.
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Affiliation(s)
- P T Prathima
- Sugarcane Breeding Institute, Coimbatore-7, India.
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Vembarasan V, Nagamani G, Balasubramaniam P, Park JH. State estimation for delayed genetic regulatory networks based on passivity theory. Math Biosci 2013; 244:165-75. [PMID: 23707485 DOI: 10.1016/j.mbs.2013.05.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 05/03/2013] [Accepted: 05/08/2013] [Indexed: 11/25/2022]
Abstract
This paper is concerned with the state estimation problem for delayed genetic regulatory networks (GRNs) based on passivity analysis approach. The main purpose of the problem is to design the estimator to approximate the true concentrations of the mRNA and protein through available measurement outputs. Time-varying delays are explicitly assumed to be non-differentiable and constraint on the derivative of the time-varying delay is less than one can be removed. Based on the Lyapunov-Krasovskii functionals involving triple integral terms, using some integral inequalities and convex combination technique, a delay-dependent passivity criterion is established for GRNs in terms of linear matrix inequalities (LMIs) that can efficiently be solved by any available LMI solvers. Finally, numerical examples and simulation are presented to demonstrate the efficiency of the proposed estimation schemes.
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Affiliation(s)
- V Vembarasan
- Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamilnadu, India.
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Theesar SJS, Balasubramaniam P. Output tracking H∞ fuzzy control of nonlinear time-delay systems via Fuzzy Performance Evaluator. Journal of Intelligent & Fuzzy Systems 2013. [DOI: 10.3233/ifs-2012-0624] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- S. Jeeva Sathya Theesar
- Department of Mathematics, Gandhigram Rural Institute – Deemed University, Gandhigram, Tamilnadu, India
- Institute for Mathematical Research, Universiti Putra Malaysia, UPM Serdang, Selangor, Malaysia
| | - P. Balasubramaniam
- Department of Mathematics, Gandhigram Rural Institute – Deemed University, Gandhigram, Tamilnadu, India
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Lakshmanan S, Park JH, Jung H, Balasubramaniam P, Lee S. Design of state estimator for genetic regulatory networks with time-varying delays and randomly occurring uncertainties. Biosystems 2013. [DOI: 10.1016/j.biosystems.2012.11.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Theesar SJS, Balasubramaniam P, Banerjee S. Comment on "Generalized projective synchronization in time-delayed systems: nonlinear observer approach" [Chaos 19, 013102 (2009); 20, 029902 (2010)]. Chaos 2012; 22:038101. [PMID: 23020506 DOI: 10.1063/1.4747712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In Chaos 19, 013102 (2009), the author proposed generalized projective synchronization for time delay systems using nonlinear observer and obtained sufficient condition to ensure projective synchronization for modulated time varying delay. There are concerns with the obtained conditions as the result was applicable only to trivial case of time varying delay τ[over dot](1)(t)=dτ(1)(t)/dt<1. In this paper, we note the drawbacks of the proposed sufficient condition. The new improved sufficient condition for ensuring the projective synchronization of time varying delayed systems is presented. The proposed new criteria have been verified by adopting the Ikeda system.
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Affiliation(s)
- S Jeeva Sathya Theesar
- Department of Mathematics, Gandhigram Rural University, Gandhigram 624302, Tamilnadu, India
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Chandran R, Balasubramaniam P. Delay Dependent Exponential Stability for Fuzzy Recurrent Neural Networks with Interval Time-Varying Delay. Neural Process Lett 2012. [DOI: 10.1007/s11063-012-9239-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Balasubramaniam P, Syed Ali M. Stability analysis of Takagi–Sugeno stochastic fuzzy Hopfield neural networks with discrete and distributed time varying delays. Neurocomputing 2011. [DOI: 10.1016/j.neucom.2010.12.029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Balasubramaniam P, Nagamani G. A delay decomposition approach to delay-dependent passivity analysis for interval neural networks with time-varying delay. Neurocomputing 2011. [DOI: 10.1016/j.neucom.2011.01.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Balasubramaniam P, Kalpana M, Rakkiyappan R. Global asymptotic stability of BAM fuzzy cellular neural networks with time delay in the leakage term, discrete and unbounded distributed delays. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.mcm.2010.10.021] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
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O'dwyer K, Chen KS, Balasubramaniam P. . West J Med 2011; 344:d8206-d8206. [DOI: 10.1136/bmj.d8206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Campbell R, Hughes K, Balasubramaniam P. . West J Med 2010; 341:c6616-c6616. [DOI: 10.1136/bmj.c6616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Balasubramaniam P, Rakkiyappan R, Krishnasamy R. Stochastic stability of Markovian jumping uncertain stochastic genetic regulatory networks with interval time-varying delays. Math Biosci 2010; 226:97-108. [DOI: 10.1016/j.mbs.2010.04.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2009] [Revised: 04/13/2010] [Accepted: 04/14/2010] [Indexed: 01/24/2023]
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Rajaratnam R, Mann C, Balasubramaniam P, Marsden JR, Taibjee SM, Shah F, Lim R, Papini R, Moiemen N, Lewis H. Toxic epidermal necrolysis: retrospective analysis of 21 consecutive cases managed at a tertiary centre. Clin Exp Dermatol 2010; 35:853-62. [DOI: 10.1111/j.1365-2230.2010.03826.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Balasubramaniam P, Lakshmanan S, Rakkiyappan R. Delay-interval dependent robust stability criteria for stochastic neural networks with linear fractional uncertainties. Neurocomputing 2009. [DOI: 10.1016/j.neucom.2009.06.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Balasubramaniam P, Rakkiyappan R. Delay-dependent robust stability analysis of uncertain stochastic neural networks with discrete interval and distributed time-varying delays. Neurocomputing 2009. [DOI: 10.1016/j.neucom.2009.02.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Lichen sclerosus is a common condition affecting the vulva and long-term follow-up is recommended. We audited a group of patients discharged from the vulval clinic and found that 38% had not seen their GP 12 months after discharge. Of those that were seen, 17% were not examined. Further education is needed to improve the follow-up of these patients.
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Affiliation(s)
- P Balasubramaniam
- Department of Dermatology, Worcestershire Royal Hospital, Worcester, UK
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Math MV, Balasubramaniam P. Steps to control the burden of cardiovascular disease in the Indian Subcontinent. Indian J Med Res 2007; 125:590-1. [PMID: 17598948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
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