Informatics Publishing Limited

Gargi R. Kumar ¹, I. Hembrom ¹, M. K. Sinha ¹

Affiliations
1 Central Tasar Research and Training Institute, Ranchi, Jharkhand, IN

Abstract

Terminalia tomentosa (Combretaceae) has been well recognized in tropical tasar silk industry as the most important primary food plant. Fifty accessions of T. tomentosa of diverse origin were selected for studying the genetic diversity for 36 morpho-physio-anatomical parameters. Analysis of variance indicated a significant difference among accessions for most of the quantitative characters studied. The maximum coefficient of variation was recorded for phenol (53.21%) followed by proline (52.10%), moisture (50.16%) and protein (43.7%), contents in the leaf. All the accessions were grouped into 7 clusters with maximum accessions (21) in cluster I followed by cluster II and cluster IV having 11 accessions each. Cluster III had 4 accessions and remaining clusters were represented by one accession each. The presence of variability in the 50 germplasm accessions was also reflected in the cluster means for traits studied. Maximum contribution towards genetic diversity (47.92%) was recorded for proline followed by protein (26.37%) contents, thereafter, reducing (10.53%) and non reducing sugar (11.27%) contributed for genetic diversity. The results indicated that pattern of distribution of genotypes into various clusters was at random indicating that geographical distribution and genetic diversity were not related.

Keywords

Terminalia tomentosa, Variability, Cluster Analysis.

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Shweta Kumari ¹, Ramakar Jha ¹, Vivekanand Singh ¹, Klaus Baier ², M. K. Sinha ²

Affiliations
1 Department of Civil Engineering, NIT, Patna - 800005, Bihar, IN
2 Department of Engineering Geology and Hydrogeology, RWTH Aachen University, DE

Abstract

Objectives: This study aims at the vulnerability assessment of groundwater in Raipur and Naya Raipur, Chhattisgarh, India, and to identify areas where vulnerability of groundwater to contamination is the most. Methods: A vulnerability map has been developed using SINTACS model in order to identify areas where vulnerability of groundwater to contamination is the most. In this analysis, vulnerability index is calculated by considering different hydrogeological parameters such as water table depth, net recharge, unsaturated conditions, soil media, aquifer media, hydraulic conductivity and topographic slope. All the parameters used in this study have been prepared, classified, weighted and integrated in a Geographic Information System (GIS) environment. Findings: The value of vulnerability index estimated lies between 121 to 176.Further, result shows that out of total area, 0.26% of the area indicates very low vulnerability 11.58% indicates low vulnerability 81.35% indicates moderate vulnerability and 6.81% of area indicates high vulnerability. It means majority of the study area exhibit moderate vulnerability. The study produces an effective tool for local authorities who manage and monitor the ground water resources. Novelty: This paper deals with a new approach towards vulnerability assessment. Instead of the conventional statistical methods, this work uses the SINTACS method which is a much improved method and hence provides much more probable values of vulnerability indices than those obtained from DRASTIC methods.

Keywords

GIS, Groundwater, SINTACS Model, Vulnerability.

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Krishna Kumar Singh ¹, M. K. Sinha ¹

Affiliations
1 Department of Mechanical Engineering, National Institute of Technology, Jamshedpur-831014, Jharkhand, IN

Abstract

Background/Objective:In this paper, an entropy generation rateof a radial flow type heat sink model has been investigated and its minimization is the primary aim of this study to exhibit the overall performance of the model. Methods/Statistical Analysis: The entropy generation method (EGM), which is one of the best modeling and optimization approach, has been used to optimize the parametric variable of the heat sink. In this study, a numerical iterative technique of Newton-Raphson method has been employed to solve the multiple nonlinear equation system which occurred in the analysis. Findings:The optimization was conducted to study the effects of the number of fins, thermal resistance of the heat sink and the approach velocity on the rate of entropy generation for the heat sink model. From the optimized results of the model, the number of fins, N ≈ 55 was estimated for the minimization of entropy generation rate, and its effect on the thermal resistance of the heat sink was also observed. The variation of the entropy generation rate and the number of fins at a different approach velocity were reported in this analysis, and also,three-dimensional surface plotis created by the surf command in MATLAB software. Application/Improvements: The entropy generation minimization method was employed to exhibit the overall performance of the optimized heat sink model and its application is more advantageous in the illumination industry.

Keywords

Analytical Model, Entropy Generation Minimization,Forced Convection, Heat Transfer, Radial Heat Sinks.

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