Debasis Sahoo

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Traumatic brain injury (TBI) is the leading cause of death and permanent impairment over the last decades. In both the severe and mild TBIs, diffuse axonal injury (DAI) is the most common pathology and leads to axonal degeneration. Computation of axonal strain by using finite element head model in numerical simulation can enlighten the DAI mechanism and(More)
A composite material model for skull, taking into account damage is implemented in the Strasbourg University finite element head model (SUFEHM) in order to enhance the existing skull mechanical constitutive law. The skull behavior is validated in terms of fracture patterns and contact forces by reconstructing 15 experimental cases. The new SUFEHM skull(More)
This paper proposes the implementation of fractional anisotropy and axonal fiber orientation from diffusion tensor imaging (DTI) of 12 healthy patients into an existing human FE head model to develop a more realistic brain model with advanced constitutive laws. Further, the brain behavior was validated in terms of brain strain against experimental data(More)
In this paper we compare two methodologies to interpolate linear as well as highly non-linear functions in multidimensional spaces having up to 500 dimensions. Two methodologies are compared: the Radial Basis Function (RBF) and the Wavelet based Neural Network (WNN). The accuracy, robustness, efficiency, transparency and conceptual simplicity are discussed.(More)
This paper describes a new method for constructing wavelet neural network in order to improve the accuracy of prediction for multi-dimensional function spaces. An algorithm is developed using the concept of evolutionary search in wavelet neural network. It helps in decreasing the computational effort needed for building the wavelet neural network. Several(More)
BACKGROUND Silicosis is an ancient occupational illness reported in silica mill workers, agate stone workers, slate pen workers and mining industry. However its association in flour mill workers has not been established. AIMS To study the incidence of silicosis and respiratory morbidity in flour mill workers. SETTINGS AND DESIGN A prospective study of(More)
This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, redistribution , reselling , loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents(More)
The objective of this study was to develop an automatic, self-sufficient, preliminary design algorithm for optimization of topologies of branching networks of internal cooling passages. The software package includes a random branches generator, a quasi 1-D thermo-fluid analysis code COOLNET, and a multiobjective hybrid optimizer. COOLNET analysis software(More)
The objective of this study was to enhance an existing finite element (FE) head model with composite modeling and a new constitutive law for the skull. The response of the state-of-the-art FE head model was validated in the time domain using data from 15 temporo-parietal impact experiments, conducted with postmortem human surrogates. The new model predicted(More)