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Hyderabad, India

Netti K.,NGRI | Radhika Y.,Gandhi Institute of Technology and Management
2015 IEEE International Conference on Computational Intelligence and Computing Research, ICCIC 2015 | Year: 2015

In Data Mining classification plays prominent role in predicting outcomes. One of the best supervised classification techniques in Data Mining is Naive Bayes Classification. Naive Bayes Classification is good at predicting outcomes and often outperforms other classification techniques. One of the reasons behind the strong performance of Naive Bayes Classification is due to the assumption of conditional Independence among predictors. However, this very strong assumption leads to loss of accuracy. In this paper, the authors are proposing a novel method for improving accuracy in Naive Bayes Classifier. The proposed novel technique used in NBC gave better accuracy even with Conditional Independence. © 2015 IEEE. Source

Reddy P.R.,NGRI
International Journal of Earth Sciences and Engineering | Year: 2012

Earthquake resultant vulnerabilities and hazards can only be addressed through an integrated technological and scientific interventions. Since earthquake resultant energy destabilises the subsurface and surface strata, resulting in damage to building structural stability a realistic interaction, with a holistic approach, between earth scientists and structural engineers can help in better implementation of preventive, curative, mitigation and developmental measures. © 2012 CAFET-INNOVA TECHNICAL SOCIETY. Source

Krishnamacharyulu S.K.G.,University | Rao B.U.M.,C.G.W.B. | Singh V.S.,NGRI
2nd International Conference on Engineering Geophysics | Year: 2013

In coastal regions, particularly in Deltas the fresh groundwater aquifers are under stress due to the improper mining of fresh water. Groundwater studies in the Deltas are difficult mainly due to complexities in their geomorphology. Western Krishna Delta in southern India with densely populated and abundant agricultural fields is one example where the detailed hydrogeological studies are prerequisite for sustainable water management. Most of the earlier hydrogeological studies carried out were only at macro level and considered the entire Delta as one geomorphic unit i.e. alluvium. This study shows that this delta is not occurring as one geomorphic unit and there are different micro-geomorphic units in it. Keeping this in view a detailed study is carried out to identify different micro geomorphic units and groundwater conditions in each of the geomorphic unit. Dividing the Delta into micro units is mandatory in order to understand and address the groundwater problems, as each micro geomorphic unit has major bearing on the occurrence of groundwater and its quality. A comprehensive study is made using geophysics, hydrometerology, hydrogeological and hydrochemistry to understand the salinity conditions in this Delta area and to delineate the fresh water pockets in order to protect the precious groundwater resources. Source

Pauwels H.,Bureau de Recherches Geologiques et Minieres | Negrel P.,Bureau de Recherches Geologiques et Minieres | Dewandel B.,Indo French Center for Ground Water Research | Dewandel B.,Bureau de Recherches Geologiques et Minieres | And 5 more authors.
Journal of Hydrology | Year: 2015

Hydrochemical borehole-loggings with a submersible Idronaut Ocean Seven 302 multiparameter probe equipped of F- and NO3-ion-selective electrodes in combination with EC, pH and dissolved oxygen, were applied for characterizing fluoride (F) contamination in a crystalline (hard-rock) aquifer of a small Indian agricultural watershed where groundwater is intensively abstracted for rice irrigation. A high accuracy of F concentrations determined in-situ-shown by comparing with laboratory analyses-was obtained through using conductivity logs for ionic strength consideration. Large variations in chemical composition and particularly of F-concentration were observed inside boreholes, though restricted to the weathered/fractured layer down to 30-35m depth. This conforms to the hydrogeological model of a crystalline aquifer where most groundwater flow occurs in the shallow part of the fractured zone. The general trend of increasing F content with depth results from F accumulation through water-rock interaction, but the shape of the F profile depends on the connectivity of the fracture network close to the borehole. The concentrations seen within the water-table fluctuation zone locally suggest F input from fertilizers in groundwater, in addition to the earlier-demonstrated role of evaporation from irrigation return flow. It is also likely that, locally, the deepening of boreholes has contributed to increasing the population's vulnerability by tapping F-enriched groundwater at depth. © 2015 Elsevier B.V. Source

Vidya Sagar R.,Indian Institute of Science | Prasad R.V.,Indian Institute of Science | Raghu Prasad B.K.,Indian Institute of Science | Rao M.V.M.S.,NGRI
Experimental Mechanics | Year: 2013

This article reports the acoustic emission (AE) study of precursory micro-cracking activity and fracture behaviour of quasi-brittle materials such as concrete and cement mortar. In the present study, notched three-point bend specimens (TPB) were tested under crack mouth opening displacement (CMOD) control at a rate of 0.0004 mm/sec and the accompanying AE were recorded using a 8 channel AE monitoring system. The various AE statistical parameters including AE event rate (dn/dt), AE energy release rate (dE/dt), amplitude distribution for computing the AE based b-value, cumulative energy (ΣE) and ring down count (RDC) were used for the analysis. The results show that the micro-cracks initiated and grew at an early stage in mortar in the pre peak regime. While in the case of concrete, the micro-crack growth occurred during the peak load regime. However, both concrete and mortar showed three distinct stages of micro-cracking activity, namely initiation, stable growth and nucleation prior to the final failure. The AE statistical behavior of each individual stage is dependent on the number and size distribution of micro-cracks. The results obtained in the laboratory are useful to understand the various stages of micro-cracking activity during the fracture process in quasi-brittle materials such as concrete & mortar and extend them for field applications. © 2013 Society for Experimental Mechanics. Source

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