Time filter

Source Type

Banerjee R.,University of Technology & Management of India | Padmanaban E.,CSIR - Central Electrochemical Research Institute | Dana S.K.,CSIR - Central Electrochemical Research Institute
Pramana - Journal of Physics | Year: 2015

A design of coupling is proposed to control partial synchronization in two chaotic oscillators in a driver-response mode. A control of synchrony between one response variables is made possible (a transition from a complete synchronization to antisynchronization via amplitude death and vice versa without loss of synchrony) keeping the other pairs of variables undisturbed in their pre-desired states of coherence. Further, one of the response variables can be controlled so as to follow the dynamics of an external signal (periodic or chaotic) while keeping the coherent status of other variables unchanged. The stability of synchronization is established using the Hurwitz matrix criterion. Numerical example of an ecological foodweb model is presented. The control scheme is demonstrated in an electronic circuit of the Sprott system. © Indian Academy of Sciences. Source

Singla A.,University of Petroleum and Energy Studies | Garg R.,University of Petroleum and Energy Studies | Saxena M.,University of Technology & Management of India
International Journal of Manufacturing, Materials, and Mechanical Engineering | Year: 2016

A 356 alloy reinforced with insitu V2O5 particles by using stir casting technique. The composites were produced by the addition of oxide particles in different weight percentage. The effect of oxide powder addition on microstructure and mechanical properties of produced composites were investigated. The effect of heat treatment on microstructure and mechanical properties were investigated by optical microscope, Microhardness tester and tension test. A significant improvement in hardness and tensile strength was revealed in the produced composite as compared to the base alloy. With the addition of oxide particles, the shape and size of eutectic Si changed which in turn affects the properties. It was observed that 2h solutionizing followed by the artificial aging was sufficient to make the structure homogenize and to produce the hardening precipitates. The improvement in the mechanical properties has been observed due to the age hardening precipitates in addition with refinement of insitu V2O5 particles. © Copyright 2016 IGI Global. Source

Kurre S.K.,University of Petroleum and Energy Studies | Pandey S.,University of Petroleum and Energy Studies | Garg R.,University of Petroleum and Energy Studies | Saxena M.,University of Technology & Management of India
Biofuels | Year: 2015

Conditioning monitoring is constantly helpful in scheduling maintenance activity and deciding the oil drain period for engines to ascertain the highest performance. Conditioning monitoring assures increased availability, higher design efficiency, and reduced maintenance cost. In the present work, experiments were performed on two identical single-cylinder engines by running them for 144 hours at a constant speed of 1500 rpm. The first engine was fueled with butanol blended fuel and the second with neat diesel fuel. Three samples of engine oil from each engine were collected after 48, 96, and 144 hours respectively. The engine oil (multigrade servo 20W-40) samples were examined to determine the condition of the engine by two methods: wear metal analysis; and physical and chemical tests. The wear metal analysis was monitored by the ICE 3000 series atomic absorption spectrometer. The viscosity was measured using the Anton Paar Rheolab QC rheometer at a constant speed of 1200 rpm and 40 °C temperature and the total acid number was measured by the titration method. The metal wear, total acid number, and viscosity in the butanol-fueled engine were slightly greater than those of the diesel-fueled engine. © 2015 © 2015 Taylor & Francis. Source

Pal P.,National Institute of Technology Durgapur | Debroy S.,National Institute of Technology Durgapur | Mandal M.K.,National Institute of Technology Durgapur | Banerjee R.,University of Technology & Management of India
Nonlinear Dynamics | Year: 2015

We present a design of coupling to achieve targeted synchronization in two parameter mismatched chaotic discrete dynamical systems. The coupling design is of open-plus-closed-loop type for which a suitable stability criterion is derived. Numerically the proposed coupling design is illustrated using the 1D logistic map, 2D and 3D Henon maps. Experimental realization of the targeted coherent dynamics is presented using 1D logistic map. © 2014, Springer Science+Business Media Dordrecht. Source

Chakraborty M.,Saha Institute of Nuclear Physics | Zeen Devi H.,University of Technology & Management of India | Ghosal A.,Saha Institute of Nuclear Physics
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

We investigate scaling ansatz with texture zeros within the framework of linear seesaw mechanism. In this variant of seesaw mechanism a simplified expression of effective neutrino mass matrix mν containing two Dirac type matrices (mD and mDS) and one Majorana type matrix (mRS) is obtained by virtue of neglecting the global U(1)L symmetry breaking term in the mass term of the Lagrangian. Along with the charged lepton mass matrix, the matrix mRS, too, is chosen in a diagonal basis whereas a scaling relation is incorporated in mD and mDS with different scale factors. Our goal in this work is to achieve a completely phenomenologically acceptable mν generated by combinations of mD and mDS containing least number of independent parameters or maximum number of zeros. At the end of the numerical analysis it is found that number of zeros in any of the constituent Dirac type matrices (mD and mDS) of mν cannot be greater than six in order to meet the phenomenological requirements. The hierarchy obtained here is normal and also the values of the two parameters sum mass (∑mi) and |mνee| are below the present experimental lower limit. © 2014 The Authors. Source

Discover hidden collaborations