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Jaipur, India

The Indian Institute of Technology Jodhpur , is a public university located in Jodhpur in the state of Rajasthan in India. It is one of the eight new Indian Institutes of Technology established by the Ministry of Human Resource Development, government of India under The Institutes of Technology Act, 2011 which declares these eight IITs as well as the conversion of the Institute of Technology, Banaras Hindu University to IIT. The Act was passed in the Lok Sabha on 24 March 2011 and by the Rajya Sabha on 30 April 2012. Wikipedia.

Sinha M.,Goethe University Frankfurt | Sinha M.,Indian Institute of Technology Jodhpur | Mukhopadhyay B.,Indian Institute of Science | Sedrakian A.,Goethe University Frankfurt
Nuclear Physics A | Year: 2013

Compact stars with strong magnetic fields (magnetars) have been observationally determined to have surface magnetic fields of order of 1014-1015 G, the implied internal field strength being several orders larger. We study the equation of state and composition of dense hypernuclear matter in strong magnetic fields in a range expected in the interiors of magnetars. Within the non-linear Boguta-Bodmer-Walecka model we find that the magnetic field has sizable influence on the properties of matter for central magnetic field B ≥ 1017 G, in particular the matter properties become anisotropic. Moreover, for the central fields B ≥ 1018 G, the magnetized hypernuclear matter shows instability, which is signalled by the negative sign of the derivative of the pressure parallel to the field with respect to the density, and leads to vanishing parallel pressure at the critical value Bcr ≃ 1019 G. This limits the range of admissible homogeneously distributed fields in magnetars to fields below the critical value Bcr. © 2012 Elsevier B.V.. Source

Bag S.,Indian Institute of Technology Kharagpur | Harit G.,Indian Institute of Technology Jodhpur
Pattern Recognition Letters | Year: 2011

Digital skeleton of character images, generated by thinning method, has a wide range of applications for shape analysis and classification. But thinning of character images is a big challenge. Removal of spurious strokes or deformities in thinning is a difficult problem. In this paper, we propose a contour-based thinning method used for performing skeletonization of printed noisy isolated character images. In this method, we use shape characteristics of text to get skeleton of nearly same as the true character shape. This approach helps to preserve the local features and true shapes of the character images. As a by-product of our thinning approach, the skeleton also gets segmented into strokes in vector form. Hence further stroke segmentation is not required. Experiment is done on printed English, Bengali, Hindi, and Tamil characters and we obtain much better results comparing with other thinning methods without any post-processing. © 2011 Elsevier B.V. All rights reserved. Source

Pratihera B.,Indian Institute of Technology Jodhpur
Procedia Engineering | Year: 2012

The objectives of this present work is to study the stability and bifurcation control of an idealized electrostatically actuated microcantilever MEMS device that can widely observe in the field MEMS application. Here, the cantilever based device has been modelled as a spring-mass-damper system considering both the linear and nonlinear spring and damper. Simultaneously, the cantilever based device is excited harmonically by applied voltages. The method of multiple scales is employed to obtain the reduced order equations in terms of amplitude and phase those are directly used to determine the approximate the solutions for different resonance conditions. The catastrophic failure of the system may occur due to the presence of saddle-node and pitchfork bifurcation points as it leads the jump phenomenon. Basins of attractions are plotted in order to find the initial condition for a specific solution in a region having more than one solution. The obtained results can successfully be used in designing the microcantilever based devices that depict typical realistic nonlinear characteristics in the field of MEMS application. © 2012 The Authors. Published by Elsevier Ltd. Source

Sinha M.,Goethe University Frankfurt | Sinha M.,Indian Institute of Technology Jodhpur | Sedrakian A.,Goethe University Frankfurt
Physical Review C - Nuclear Physics | Year: 2015

We describe the microphysics, phenomenology, and astrophysical implication of a B-field induced unpairing effect that may occur in magnetars, if the local B field in the core of a magnetar exceeds a critical value Hc2. Using the Ginzburg-Landau theory of superconductivity, we derive the Hc2 field for proton condensate taking into the correction (≤30%) which arises from its coupling to the background neutron condensate. The density dependence of pairing of proton condensate implies that Hc2 is maximal at the crust-core interface and decreases towards the center of the star. As a consequence, magnetar cores with homogenous constant fields will be partially superconducting for "medium-field" magnetars (1015≤B≤5×1016G) whereas "strong-field" magnetars (B>5×1016G) will be void of superconductivity. The neutrino emissivity of a magnetar's core changes in a twofold manner: (i) the B-field assisted direct Urca process is enhanced by orders of magnitude, because of the unpairing effect in regions where B≥Hc2; (ii) the Cooper-pair breaking processes on protons vanish in these regions and the overall emissivity by the pair-breaking processes is reduced by a factor of only a few. © 2015 American Physical Society. Source

Rao B.R.,Poornaprajna Institute of Scientific Research | Srikanth R.,Poornaprajna Institute of Scientific Research | Chandrashekar C.M.,Chennai Mathematical Institute | Banerjee S.,Indian Institute of Technology Jodhpur
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2011

Noisy quantum walks are studied from the perspective of comparing their quantumness as defined by two popular measures, measurement-induced disturbance (MID) and quantum discord (QD). While the former has an operational definition, unlike the latter, it also tends to overestimate nonclassicality because of a lack of optimization over local measurements. Applied to quantum walks, we find that MID, while acting as a loose upper bound on QD, still tends to reflect correctly trends in the behavior of the latter. However, there are regimes where its behavior is not indicative of nonclassicality: in particular, we find an instance where MID increases with the application of noise, where we expect a reduction of quantumness. © 2011 American Physical Society. Source

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