Suchergebnisse

AbstractIpomoea aquatica—an aquatic macrophyte—could remove chromium and manganese from their mixtures after 96 h exposure at a maximum rate of 82.8% and 93.9%, respectively, in microcosms. The removal rates were higher (90.4% and 94.5%, respectively) after 96 h exposure in mesocosms with gravel beds and vertical subsurface flow. The higher removal rates in mesocosm were probably due to a wide range of partitioned micro‐environments close to the root boundaries, and within the biofilms on both root and gravel surfaces. The Cr and Mn removal efficiencies of I. aquatica increased with increasing Cr or Mn concentrations in the medium. The study reveals the potential of I. aquatica—a fast‐growing species that can proliferate by fragmentation—to effectively remove Cr and Mn within a relatively short period of time, thereby raising the prospect of its use in phytoremediation of wastewater contaminated with these metals.

"This book brings together empirical research on the changing conditions of a range of river basin environments in the contemporary world, including the history and culture of local societies living in these river basins. It provides theoretical insights on the patterns and nature of the interaction between rivers and their use by human communities"--

Nonparametric two‐sample problems are extremely important for applications in different applied disciplines. We define a general MI based on theφdivergences and use its estimate to propose a new general class of nonparametric two sample tests for continuous distributions. We derive the asymptotic distribution of the estimates ofφ‐divergence‐based MI (φDMI) under the assumption of independence in the hybrid setup of one binary and one continuous random variables. Additionally, for finite sample cases, we describe an algorithm for obtaining the bootstrap‐based critical value of our proposed two‐sample test based on the estimatedφDMI. We demonstrate through extensive simulations that the proposed class of tests work exceptionally well in many situations and can detect differences where other two‐sample tests fail. Finally, we analyze an application of our proposed tests to assess a solution to information leakage in e‐passport data.

Papers presented at a symposium on "Sustainable development of water resources in Barak Valley", organized by Silchar Centre of the Institute of Northeast India Studies at Assam University on Mar. 24, 2010