Indian Institute of Technology Ropar

About: Indian Institute of Technology Ropar is a education organization based out in Ropar, India. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 1014 authors who have published 2878 publications receiving 35715 citations.

First-exit times of an inverse Gaussian process

Abstract: The first-exit time process of an inverse Gaussian Levy process is considered. The one-dimensional distribution functions of the process are obtained. They are not infinitely divisible and the tail...

Outage Probability and Rate for $\kappa$ - $\mu$ Shadowed Fading in Interference Limited Scenario

Abstract: The $\kappa$ - $\mu$ shadowed fading model is a very general fading model as it includes both $\kappa$ - $\mu$ and $\eta$ - $\mu$ as special cases. In this paper, we derive the expression for outage probability when the signal-of-interest (SoI) and interferers both experience $\kappa$ - $\mu$ shadowed fading in an interference limited scenario. The derived expression is valid for arbitrary SoI parameters, arbitrary $\kappa$ , and $\mu$ parameters for all interferers and any value of the parameter $m$ for the interferers excepting the limiting value of $m\rightarrow \infty$ . The expression can be expressed in terms of Pochhammer integral, where the integrands of integral only contains elementary functions. The outage probability expression is then simplified for various special cases, especially when SoI experiences $\eta$ - $\mu$ or $\kappa$ - $\mu$ fading. Furthermore, the rate expression is derived when the SoI experiences $\kappa$ - $\mu$ shadowed fading with the integer values of $\mu$ , and the interferers experience $\kappa$ - $\mu$ shadowed fading with arbitrary parameters. The rate expression can be expressed in terms of sum of Lauricella’s function of the fourth kind. The utility of our results is demonstrated by using the derived expression to study and compare fractional frequency reuse and soft frequency reuse in the presence of $\kappa$ - $\mu$ shadowed fading. Extensive simulation results are provided and these further validate our theoretical results.

Selective recognition of lithium(i) ions using Biginelli based fluorescent organic nanoparticles in an aqueous medium

Abstract: This study presents the fabrication of a Biginelli compound 1 into fluorescent organic nanoparticles (ONP) using a reprecipitation method. The fabricated ONP were characterized by TEM and DLS. Further, the ONP were found to be selective towards Li(I) ions with a “fluorescence turn-on” mechanism and exhibited no significant response to possibly interfering cations (Na+, K+, Mg2+ and Ca2+) in a competitive experiment. The limit of detection was calculated to be 122 nM. It is apparent from the pH titration that the current sensor is independent of any variation in pH. To get a better insight of spacial arrangement, the crystal structure of 1 was solved by X-ray crystallography. The progress in sensing of lithium ions by various types of sensors on different instruments has also been discussed briefly.