Validation of Participatory Farming Situation Identification: Case of Rainfed Rice Cultivation in Selected Area of West Bengal, India

Paper Presented at the 4th World Congress on Conservation Agriculture, 2009 at New Delhi, Indiamicro-farming situation, farmers’ classification, validation of indigenous classification, rainfed rice, appropriate technology, Community/Rural/Urban Development, Farm Management, Research Methods/ Statistical Methods, Teaching/Communication/Extension/Profession,

Load Balancing Unstructured Adaptive Grids for CFD Problems

Mesh adaption is a powerful tool for efficient unstructured-grid computations but causes load imbalance among processors on a parallel machine. A dynamic load balancing method is presented that balances the workload across all processors with a global view. After each parallel tetrahedral mesh adaption, the method first determines if the new mesh is sufficiently unbalanced to warrant a repartitioning. If so, the adapted mesh is repartitioned, with new partitions assigned to processors so that the redistribution cost is minimized. The new partitions are accepted only if the remapping cost is compensated by the improved load balance. Results indicate that this strategy is effective for large-scale scientific computations on distributed-memory multiprocessors

Satisfiability Test with Synchronous Simulated Annealing on the Fujitsu AP1000 Massively-Parallel Multiprocessor

Solving the hard Satisfiability Problem is time consuming even for modest-sized problem instances. Solving the Random L-SAT Problem is especially difficult due to the ratio of clauses to variables. This report presents a parallel synchronous simulated annealing method for solving the Random L-SAT Problem on a large-scale distributed-memory multiprocessor. In particular, we use a parallel synchronous simulated annealing procedure, called Generalized Speculative Computation, which guarantees the same decision sequence as sequential simulated annealing. To demonstrate the performance of the parallel method, we have selected problem instances varying in size from 100-variables/425-clauses to 5000-variables/21,250-clauses. Experimental results on the AP1000 multiprocessor indicate that our approach can satisfy 99.9 percent of the clauses while giving almost a 70-fold speedup on 500 processors

Driving Development through Smart Village in Tripura: An Overview

Rural areas are home to the vast majority of Indians. Most Indian rural villages struggle with various challenges to accelerate rural development. They lack basic health care, education, and other infrastructure facilities. Rural India experiences the impact of global warming and climate change affecting the social and economic life of the people. Tripura, a tiny state in Northeast India, is also no exception to this. As per the census data of 2011, 73.83% of its population lives in rural villages. Like most rural villages in India, the rural villages in Tripura also face similar problems and challenges. It aims to transform rural villages into viable growth centres. The concept of a Smart Village can be a useful perspective to address the major rural problems in India. In the current study two rural villages-Punsari Smart Village located in Sabarkanta district of Gujarat, and Chantail Village, a non-smart village of Unokoti district in Tripura are taken up in order to understand the development dynamics in the smart and non-smart villages of rural India. Current study is basedon a survey conducted from June to September 2022 with 20 villagers from each ward of Chantail village of Unakoti District. To conduct the research , field observation and semi-structured interview methods were used during the survey to collect first-hand information. This study aims to reveal that in terms of providing services to the residents of villages, Chantail village is lagging far behind the Punsari smart village. This is largely due to the absence of a smart village concept in Tripura. Moreover, this paper is attempt to draw the attention of the policy makers of Tripura for sustainably accelerating rural development by focusing on the vitality of smart village

Mesh quality control for multiply-refined tetrahedral grids

A new algorithm for controlling the quality of multiply-refined tetrahedral meshes is presented in this paper. The basic dynamic mesh adaption procedure allows localized grid refinement and coarsening to efficiently capture aerodynamic flow features in computational fluid dynamics problems; however, repeated application of the procedure may significantly deteriorate the quality of the mesh. Results presented show the effectiveness of this mesh quality algorithm and its potential in the area of helicopter aerodynamics and acoustics

Dynamic mesh adaption for triangular and tetrahedral grids

The following topics are discussed: requirements for dynamic mesh adaption; linked-list data structure; edge-based data structure; adaptive-grid data structure; three types of element subdivision; mesh refinement; mesh coarsening; additional constraints for coarsening; anisotropic error indicator for edges; unstructured-grid Euler solver; inviscid 3-D wing; and mesh quality for solution-adaptive grids. The discussion is presented in viewgraph form

Computation of helicopter rotor acoustics in forward flight

This paper presents a new method for computing acoustic signals from helicopter rotors in forward flight. The aerodynamic and acoustic solutions in the near field are computed with a finite-difference solver for the Euler equations. A nonrotating cylindrical Kirchhoff surface is then placed around the entire rotor system. This Kirchhoff surface moves subsonically with the rotor in forward flight. The finite-difference solution is interpolated onto this cylindrical surface at each time step and a Kirchhoff integration is used to carry the acoustic signal to the far field. Computed values for high-speed impulsive noise show excellent agreement with model-rotor and flight-test experimental data. Results from the new method offer high accuracy with reasonable computer resource requirements