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Lusaka, Zambia

Tabbone S.,University of Lorraine | Ziou D.,DMI-St. EUGENE University
Electronics Letters

A detailed study is presented on the robustness of the Radon transform to additive white noise for the general case of a rectangular grey-level image. © 2014 The Institution of Engineering and Technology. Source

Chengalur-Smith I.S.,University at Albany | Potnis D.D.,University of Tennessee at Knoxville | Mishra G.,DMI-St. EUGENE University
Proceedings of the Annual Hawaii International Conference on System Sciences

IBM's Spoken Web Service enables illiterate and disadvantaged communities in the developing world to create and access VoiceSites over the phone. A pilot study was used to examine the adoption of this service by a community of farmers in rural Gujarat, India. Data analysis carried out using the principles of grounded theory helped us identify the factors responsible for the adoption of the service by a community of information poor farmers. The over-arching themes that emerged were: community of practice among farmers, gatekeeping, and characteristics of the service. In particular, we find that endorsements and word of mouth are important disseminating mechanisms and that community and individual interests, norms of reciprocity and trust motivate participation in the service. In addition, gatekeeping mechanisms and gatekeepers play an important role in the adoption of this service. © 2016 IEEE. Source

Swingedouw D.,LSCE IPSL | Rodehacke C.B.,Max Planck Institute For Meteorologie | Behrens E.,Leibniz Institute of Marine Science | Menary M.,UK Met Office | And 5 more authors.
Climate Dynamics

The recent increase in the rate of the Greenland ice sheet melting has raised with urgency the question of the impact of such a melting on the climate. As former model projections, based on a coarse representation of the melting, show very different sensitivity to this melting, it seems necessary to consider a multi-model ensemble to tackle this question. Here we use five coupled climate models and one ocean-only model to evaluate the impact of 0.1 Sv (1 Sv = 106 m3/s) of freshwater equally distributed around the coast of Greenland during the historical era 1965-2004. The ocean-only model helps to discriminate between oceanic and coupled responses. In this idealized framework, we find similar fingerprints in the fourth decade of hosing among the models, with a general weakening of the Atlantic Meridional Overturning Circulation (AMOC). Initially, the additional freshwater spreads along the main currents of the subpolar gyre. Part of the anomaly crosses the Atlantic eastward and enters into the Canary Current constituting a freshwater leakage tapping the subpolar gyre system. As a consequence, we show that the AMOC weakening is smaller if the leakage is larger. We argue that the magnitude of the freshwater leakage is related to the asymmetry between the subpolar-subtropical gyres in the control simulations, which may ultimately be a primary cause for the diversity of AMOC responses to the hosing in the multi-model ensemble. Another important fingerprint concerns a warming in the Nordic Seas in response to the re-emergence of Atlantic subsurface waters capped by the freshwater in the subpolar gyre. This subsurface heat anomaly reaches the Arctic where it emerges and induces a positive upper ocean salinity anomaly by introducing more Atlantic waters. We found similar climatic impacts in all the coupled ocean-atmosphere models with an atmospheric cooling of the North Atlantic except in the region around the Nordic Seas and a slight warming south of the equator in the Atlantic. This meridional gradient of temperature is associated with a southward shift of the tropical rains. The free surface models also show similar sea-level fingerprints notably with a comma-shape of high sea-level rise following the Canary Current. © 2012 Springer-Verlag. Source

Soleimani M.,Kastle Systems | Weil T.,DMI-St. EUGENE University | Coyne E.,RBAC Consultant
IT Professional

This article provides insights and recommendations on designing and implementing converged physical and logical access control systems. Existing standards and models, either without modification or with clarifying enhancements, are available to assist in this effort. The PSIA Physical-Logical Access Interoperability (PLAI) specification combines the enhanced features of physical security, role-based AC, and attribute-based AC to provide facilities management "behind closed doors." © 1999-2012 IEEE. Source

Sebastian S.,Sri Manakula Vinayagar Engg College | Sylvestre S.,DMI-St. EUGENE University | Jayabharathi J.,Annamalai University | Ayyapan S.,Government College of Technology, Coimbatore | And 2 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

In this work we analyzed the vibrational spectra of 3,5-dinitrosalicylic acid (3,5DNSA) molecule. The total energy of eight possible conformers can be calculated by Density Functional Theory with 6-31G(d,p) as basis set to find the most stable conformer. Computational result identify the most stable conformer of 3,5DNSA is C6. The assignments of the vibrational spectra have been carried out by computing Total Energy Distribution (TED). The molecular geometry, second order perturbation energies and Electron Density (ED) transfer from filled lone pairs of Lewis base to unfilled Lewis acid sites for 3,5-DNSA molecular analyzed on the basis of Natural Bond Orbital (NBO) analysis. The formation of inter and intramolecular hydrogen bonding between OH and COOH group gave the evidence for the formation of dimer formation for 3,5-DNSA molecule. The energy and oscillator strength calculated by Time-Dependent Density Functional Theory (TD-DFT) complements with the experimental findings. The simulated spectra satisfactorily coincides with the experimental spectra. © 2014 Elsevier B.V. All rights reserved. Source

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