Indian Institute of Technology Guwahati

About: Indian Institute of Technology Guwahati is a education organization based out in Guwahati, Assam, India. It is known for research contribution in the topics: Adsorption & Catalysis. The organization has 6933 authors who have published 17102 publications receiving 257351 citations.

Measurement of the decay B0→π-ℓ+ν and determination of |Vub

Abstract: We present a measurement of the charmless semileptonic decay B-0 -> pi(-) l(+) nu using a data sample containing 657 x 10(6) B (B) over bar events collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider operating near the Y(4S) resonance. We determine the total branching fraction of the decay, B(B-0 -> pi(-) l(+) nu) = (1.49 +/- 0.04(stat) +/- 0.07(syst)) x 10(-)4. We also report a new precise measurement of the differential decay rate and extract the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar using model-independent and model-dependent approaches. From a simultaneous fit to the measured differential decay rate and lattice QCD results, we obtain vertical bar V-ub vertical bar (3.43 +/- 0: 33) x 10(-3), where the error includes both experimental and theoretical uncertainties.

Transient Conduction-Radiation Heat Transfer in Participating Media Using the Lattice Boltzmann Method and the Discrete Transfer Method

Abstract: The lattice Boltzmann method (LBM) is used to solve the energy equation of a problem involving conduction and radiation heat transfer with and without heat generation. Both steady and transient situations are considered. To demonstrate that the two different kinds of methods can be coupled, the radiative information for the governing energy equation is computed using the discrete transfer method and the LBM is used to solve the energy equation. For validation purposes, a 1-D planar conducting and radiating medium is considered. Radiatively, the medium is absorbing, emitting, and scattering. Boundaries of the medium are assumed at the specified temperatures. The heat-generation rate is considered uniform and constant throughout the medium. Transient and steady-state medium temperature and heat flux distributions are found for various values of the scattering albedo, emissivity, and conduction-radiation parameter. Results obtained by solving the energy equation using the LBM are compared against th...

Development of Active Lower Limb Robotic-Based Orthosis and Exoskeleton Devices: A Systematic Review

Abstract: The basic routine movements for elderly people are not easily accessible due to the weak muscles and impaired nerves in their lower extremity In the last few years, many robotic-based rehabilitation devices, like orthosis and exoskeletons, have been designed and developed by researchers to provide locomotion assistance to support gait behavior and to perform daily activities for elderly people However, there is still a need for improvement in the design, actuation and control of these devices for making them cost-effective in the worldwide market In this work, a systematic review is presented on available lower limb orthosis and exoskeleton devices, to date The devices are broadly reviewed according to joint types, actuation modes and control strategies Furthermore, tabular comparisons have also been presented with the types and applications of these devices Finally, the needful improvements for realizing the efficacy of lower limb rehabilitation devices are discussed along with the development stage This review will help the designers and researchers to develop an efficient robotic device for the rehabilitation of the lower limb