Search results for: B. Dubey

Items from 1 to 20 out of 36 results

article

A delayed prey–predator model with Crowley–Martin‐type functional response including prey refuge

Atasi Patra Maiti, B. Dubey, Jai Tushar

Mathematical Methods in the Applied Sciences > 40 > 16 > 5792 - 5809

In this paper, we have studied a prey–predator model living in a habitat that divided into two regions: an unreserved region and a reserved (refuge) region. The migration between these two regions is allowed. The interaction between unreserved prey and predator is Crowley–Martin‐type functional response. The local and global stability of the system is discussed. Further, the system is extended to...

article

Modeling and simulation of a wetland park: An application to Keoladeo National Park, India

Atasi Patra, Jai Tushar, B. Dubey

Mathematics and Computers in Simulation > 2017 > 134 > C > 54-78

In this paper, three mathematical models are proposed and analyzed to study the degradation and conservation of a wetland park. The first model describes the interaction of bird populations with the good biomass. The interaction is considered to be Crowley–Martin type. The good biomass is the cumulative densities of floating vegetation, fishes, waterfowl and other useful species. The model is further...

article

MODELING THE EFFECTS OF WOOD AND NON‐WOOD BASED INDUSTRIES ON FORESTRY RESOURCES

KUSUM LATA, B. DUBEY, A.K. MISRA

Natural Resource Modeling > 29 > 4 > 559 - 580

Pollution due to the wood and non‐wood based industries is one of the main reasons for the depletion of forestry resources. On the onset of industrial era, the number of industries was less but now it has increased much due to rapid pace of development. Industrialization affects forestry resources in two ways: (i) using raw materials by wood based industries and cut down by non‐wood based industries...

article

Stability and Hopf-bifurcation in a general Gauss type two-prey and one-predator system

B.D. Deka, Atasi Patra, Jai Tushar, B. Dubey

Applied Mathematical Modelling > 2016 > 40 > 11-12 > 5793-5818

A Gauss type general prey–predator mathematical model is proposed and analysed to study the effect of predation on two competing prey species. The growth rate and functional responses are taken to be general non-linear functions. By analysing the model, local stability of all possible equilibrium points is discussed. By choosing a suitable Lyapunov function the global stability of the system at positive...

article

Evaluation of developmental responses of two crop plants exposed to silver and zinc oxide nanoparticles

L.R. Pokhrel, B. Dubey

Science of the Total Environment > 2013 > 452-453 > Complete > 321-332

The increasing applications of different nanomaterials in the myriad of nano-enabled products and their potential for leaching have raised considerable environmental, health and safety (EHS) concerns. As systematic studies investigating potential anomalies in the morphology and anatomy of crop plants are scarce, herein we report on the developmental responses of two agriculturally significant crop...

article

Molecular flexibility of Mycobacterium tuberculosis ribosome recycling factor and its functional consequences: An exploration involving mutants

M Selvaraj, A Govindan, A Seshadri, B Dubey, more

Journal of Biosciences > 2013 > 38 > 5 > 845-855

Internal mobility of the two domain molecule of ribosome recycling factor (RRF) is known to be important for its action. Mycobacterium tuberculosis RRF does not complement E. coli for its deficiency of RRF (in the presence of E. coli EF-G alone). Crystal structure had revealed higher rigidity of the M. tuberculosis RRF due to the presence of additional salt bridges between domains. Two inter-domain...

article

An improved method for determination of ⁷Be in mosses

Moumita Maiti, Santosh R. Tiwari, Nilesh B. Dubey, Hemlata Bagla, more

Journal of Radioanalytical and Nuclear Chemistry > 2013 > 295 > 2 > 1443-1446

We have measured ⁷Be activity in moss samples collected from in and around Mumbai, India. The use of heavily shielded Compton suppressor system is more efficient than the conventional gamma spectroscopic system for detection of ⁷Be. The ⁷Be accumulation capacities of mosses are more than other plant samples. Therefore monitoring of young moss samples by Compton suppressor system is an excellent tool...

chapter

Integration of CAD into PACS

R. B. Dubey, M. Hanmandlu

2012 2nd International Conference on Power, Control and Embedded Systems > 1 - 6

2012 2nd International Conference on Power, Control and Embedded Systems (ICPCES)

Picture archiving and communication system (PACS) has become a mature technology over the past few years and has been widely implemented in several developed countries, in health care delivery for daily clinical imaging service and data management. A PACS is an integrated workflow system for managing images and related data which is designed to streamline operations throughout the whole patient care...

article

MODELING EFFECTS OF TWO INTERACTING POPULATIONS ON A RENEWABLE RESOURCE

B. DUBEY

Natural Resource Modeling > 25 > 2 > 325 - 363

Abstract In this paper, a general mathematical model is presented to study the effect of two populations on a resource biomass. The interaction between two populations is assumed to be competition, predation, or cooperation. These two populations may depend on the resource biomass partially, wholly, or they may predate on the resource. In each case, criteria for local stability, instability, and global...

article

Modelling effects of industrialization, population and pollution on a renewable resource

B. Dubey, A.S. Narayanan

Nonlinear Analysis: Real World Applications > 2010 > 11 > 4 > 2833-2848

In this paper, a mathematical model is proposed and analysed to study the simultaneous effect of industrialization, population and pollution on the depletion of a renewable resource. Criteria for local stability, global stability and instability are obtained. It is shown that if the densities of industrialization, population and pollution increase, then the density of the resource biomass decreases...

article

A solution to the accelerated-predator-satiety Lotka–Volterra predator–prey problem using Boubaker polynomial expansion scheme

B. Dubey, T.G. Zhao, M. Jonsson, H. Rahmanov

Journal of Theoretical Biology > 2010 > 264 > 1 > 154-160

In this study, an analytical method is introduced for the identification of predator–prey populations time-dependent evolution in a Lotka–Volterra predator–prey model which takes into account the concept of accelerated-predator-satiety.Oppositely to most of the predator–prey problem models, the actual model does not suppose that the predation is strictly proportional to the prey density. In reference...

article

A mathematical model for chemical defense mechanism of two competing species

B. Dubey, J.B. Shukla, Shalini Sharma, A.K. Agarwal, more

Nonlinear Analysis: Real World Applications > 2010 > 11 > 2 > 1143-1158

In this paper, a non-linear mathematical model is proposed and analyzed to study the phenomenon of a chemical defense mechanism involving two competing species, where each species produces a toxicant affecting the other. It is shown that if the emission rate coefficient of toxicant, produced by one species increases, the equilibrium density of the other species decreases and its magnitude is lower...

article

Modelling the depletion of forestry resources by population and population pressure augmented industrialization

B. Dubey, S. Sharma, P. Sinha, J.B. Shukla

Applied Mathematical Modelling > 2009 > 33 > 7 > 3002-3014

In this paper, a nonlinear mathematical model is proposed and analysed to study the depletion of forestry resources caused by population and population pressure augmented industrialization. It is shown that the equilibrium density of resource biomass decreases as the equilibrium densities of population and industrialization increase. It is found that even if the growth of population (whether intrinsic...

article

Modeling the survival of a resource-dependent population: Effects of toxicants (pollutants) emitted from external sources as well as formed by its precursors

J.B. Shukla, Shalini Sharma, B. Dubey, Prawal Sinha

Nonlinear Analysis: Real World Applications > 2009 > 10 > 1 > 54-70

In this paper, a nonlinear mathematical model is proposed and analyzed to study the survival of a resource-dependent population. It is assumed that this population and its resource are affected simultaneously by a toxicant (pollutant) emitted into the environment from external sources as well as formed by precursors of this population. It is shown that as the cumulative rates of emission and formation...

article

Autosomal STR variations in three endogamous populations of West Bengal, India

S. Roy, M. Eaaswarkhanth, B. Dubey, I. Haque

Legal Medicine > 2008 > 10 > 6 > 326-332

The allele frequency distribution of 15 autosomal STR loci was determined using AmpFlSTR ^® Identifiler ^TM kit in three endogamous caste populations namely, Rajbanshi, Paliya and Dhimal from northern regions of West Bengal, India. The study includes 13 CODIS STR core markers, i.e., D8S1179, D3S1358, D21S11, D7S820, CSF1PO, vWA, TPOX, D18S51, THO1, D13S317, D16S539, D5S818, FGA and two...

article

Ion-exchange studies of ^110mAg(I) using synthetic inorganic ion-exchanger

N. B. Dubey, H. K. Bagla

Journal of Radioanalytical and Nuclear Chemistry > 2007 > 274 > 2 > 271-276

In the present investigation, the selective adsorption of silver on synthetic inorganic ion exchanger, zinc(II) ferrocyanide, has been established by batch method, under specific conditions, using ^110mAg as a tracer. The efficiency of adsorption has been determined by γ-ray spectrometry and was found to be greater than 96%. The Ag(I) uptake by the exchanger has also been evaluated. The selectivity...

article

Modelling the survival of species dependent on a resource in a polluted environment

B. Dubey, J. Hussain

Nonlinear Analysis: Real World Applications > 2006 > 7 > 2 > 187-210

In this paper, a mathematical model is proposed and analysed to study the survival of species dependent on a resource in a polluted environment. Criteria for instability, local stability and global stability are obtained. The effect of diffusion on the system is also investigated. It is shown that diffusion plays a general role in stabilizing the system.

article

Continuous suture technique of ventricular septal defects on normothermic cardiopulmonary bypass in pediatric patients

Ak Mulpur, S Vyas, Sp Manoj Kumar, B Dubey, more

Indian Journal of Thoracic and Cardiovascular Surgery > 2006 > 22 > 1 > 39-39

article

Anterior mediastinal cold abscess in a case of tuberculous constrictive pericarditis—A case report

Ak Mulpur, Pk Hari Kumar, Sp Manoj Kumar, B Dubey, more

Indian Journal of Thoracic and Cardiovascular Surgery > 2006 > 22 > 1 > 90-90

article

Analysis of outcome of thymectomy in myasthenia gravis

Ak Mulpur, Pk Hari Kumar, Sp Manoj Kumar, B Dubey, more

Indian Journal of Thoracic and Cardiovascular Surgery > 2006 > 22 > 1 > 91-91

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Search results for: B. Dubey

A delayed prey–predator model with Crowley–Martin‐type functional response including prey refuge

Modeling and simulation of a wetland park: An application to Keoladeo National Park, India

MODELING THE EFFECTS OF WOOD AND NON‐WOOD BASED INDUSTRIES ON FORESTRY RESOURCES

Stability and Hopf-bifurcation in a general Gauss type two-prey and one-predator system

Evaluation of developmental responses of two crop plants exposed to silver and zinc oxide nanoparticles

Molecular flexibility of Mycobacterium tuberculosis ribosome recycling factor and its functional consequences: An exploration involving mutants

An improved method for determination of ⁷Be in mosses

Integration of CAD into PACS

MODELING EFFECTS OF TWO INTERACTING POPULATIONS ON A RENEWABLE RESOURCE

Modelling effects of industrialization, population and pollution on a renewable resource

A solution to the accelerated-predator-satiety Lotka–Volterra predator–prey problem using Boubaker polynomial expansion scheme

A mathematical model for chemical defense mechanism of two competing species

Modelling the depletion of forestry resources by population and population pressure augmented industrialization

Modeling the survival of a resource-dependent population: Effects of toxicants (pollutants) emitted from external sources as well as formed by its precursors

Autosomal STR variations in three endogamous populations of West Bengal, India

Ion-exchange studies of ^110mAg(I) using synthetic inorganic ion-exchanger

Modelling the survival of species dependent on a resource in a polluted environment

Continuous suture technique of ventricular septal defects on normothermic cardiopulmonary bypass in pediatric patients

Anterior mediastinal cold abscess in a case of tuberculous constrictive pericarditis—A case report

Analysis of outcome of thymectomy in myasthenia gravis

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