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Agartala, India

The National Institute of Technology Agartala, shortened to NIT Agartala or NITA, is a technology-oriented institute of higher education established by India's Ministry of Human Resource Development in Agartala, India. It was founded as Tripura Engineering College in 1965 and declared a National Institute of Technology in 2006. It is now the leading technical institute in the northeastern region of India after NIT Silchar and IIT Guwahati. It is considered a new institute in the family of NIT after NIT Jalandhar and NIT Hamirpur and is designated an Institute of National Importance by an act of parliament. As with all other National Institutes of Technology, admission to NITA is granted through the centrally organised Joint Entrance Examination.NIT agartala is one of the fastest developing NIT. Wikipedia.

Majumder A.,National Institute of Technology Agartala
Journal of Mechanical Science and Technology | Year: 2013

The present contribution describes an application of a hybrid approach using fuzzy logic and particle swarm optimization (PSO) for optimizing the process parameters in the electric discharge machining (EDM) of AISI 316LN Stainless Steel. In this study, each experimentation was performed under different machining conditions of pulse current, pulse on-time, and pulse off-time. Machining performances such as MRR and EWR were evaluated. A Taguchi L9 orthogonal array was produced to plan the experimentation and the regression method was applied to model the relationship between the input factors and responses. A fuzzy model was employed to provide a fitness function to PSO by unifying the multiple responses. Finally, PSO was used to predict the optimal process parametric settings for the multi-performance optimization of the EDM operation. The experimental results confirm the feasibility of the strategy and are in good agreement with the predicted results over a wide range of machining conditions employed in the process. © 2013 The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg. Source

Ghosh S.,National Institute of Technology Agartala
Soil Dynamics and Earthquake Engineering | Year: 2010

Knowledge of seismic active earth pressure behind rigid retaining wall is very important. Commonly used Mononobe-Okabe method considers pseudo-static approach, which gives the linear distribution of seismic earth force. In this paper, the pseudo-dynamic approach, which considers the effect of primary and shear wave propagations, is adopted to calculate the seismic active force. Considering the planar rupture surface, the effect of wide range of parameters like inclination of retaining wall, inclination of backfill surface, wall friction and soil friction angle, shear wave and primary wave velocity, horizontal and vertical seismic coefficients are taken into account to evaluate the seismic active force. Results are presented in terms of seismic coefficients in tabular form and variation of pressure along the depth. © 2010 Elsevier Ltd. Source

Bhattacharjee S.,National Institute of Technology Agartala | Acharya S.,National Institute of Technology Agartala
Energy Conversion and Management | Year: 2014

Solar and wind are clean energy sources with enormous potential to alleviate grid dependence. The paper aims to optimally harness the wind resource with the support of solar energy through hybrid technology for a north-east Indian state Tripura (low wind topography). Techno-economic analysis of a photovoltaic (PV)-wind hybrid simulation model has been performed for small scale application in an educational building. The study also evaluates the tangible performance of a similar plant in practical condition of the site. It has emerged from the study that major energy generation is turning out from PV segment which is promising almost all round the year. Nonetheless, a considerable amount of wind power is found to be generated during half of the year when average PV power production is comparatively less. The cost of electricity from the simulation model is found to be $0.488/kWh while renewable fraction in the total electricity share is obtained to be 0.90. From the actual performance of the plant, maximum wind penetration is observed to be 32.75%. © 2014 Elsevier Ltd. All rights reserved. Source

Pal S.K.,National Institute of Technology Agartala | Ghosh A.,Bengal Engineering and Science University
International Journal of Geomechanics | Year: 2014

This paper presents the consolidation and swelling characteristics of fly ash-montmorillonite clay mixes. Nine types of fly ash samples collected from different thermal power plants of the Eastern part of India have been used in this study. The amount of montmorillonite clay added to each fly ash sample is 10, 20, 30, 40, and 50%. The compression index (cc) of the fly ashes indicates that the rate of consolidation is very fast. With an increase in montmorillonite clay content from 0.0 to 50%, the compressibility of the fly ash-montmorillonite clay mix increases, irrespective of the type of fly ash. The value of the compression index (cc) of montmorillonite clay indicates that the embankments and fills made of fly ash-montmorillonite clay mixtures (i.e., 30, 40, and 50% of montmorillonite clay in the mix) and the structures constructed on such fills would suffer large deformation, whereas fly ash and fly ash mixed with 20% montmorillonite clay would not suffer large deformation. Specimens used for consolidation tests were compacted at the optimum moisture content (OMC) and the maximum dry density (MDD) obtained from standard Proctor compaction tests. Fly ash samples are nonswelling in nature, and the free swell index increases as the percentage of montmorillonite clay increases in the mixtures. Effects of the type of fly ashes, montmorillonite clay content in the mixes, permeability, and plasticity of fly ash-montmorillonite clay mixtures on compressibility of fly ash alone or in combination with montmorollonite clay mixes have been discussed herein. The effect of the percentage of montmorillonite clay and the plasticity index on the free swell index has also been highlighted. © 2014 American Society of Civil Engineers. Source

Ghosh S.,National Institute of Technology Agartala | Prasad Sharma R.,National Institute of Technology Agartala
International Journal of Geomechanics | Year: 2012

Knowledge of seismic active earth pressure behind a rigid retaining wall and its point of application are very important to the design of retaining walls in earthquake-prone regions. This paper presents a detailed study on the seismic active earth pressure and its point of application behind a nonvertical, rigid retaining wall supporting inclined, cohesionless backfill, using pseudo-dynamic analysis that is more realistic to representing the time and phase difference within the backfill. A planar failure surface is considered in the analysis. The effects of soil and wall friction angle, wall and backfill surface inclination, and horizontal and vertical earthquake acceleration on the active earth pressure have been explored. Results are presented in both tabular and graphical nondimensional form, including comparison with other available methods to highlight the realistic nonlinearity of seismic active earth pressure distribution. © 2012 American Society of Civil Engineers. Source

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