Informatics Publishing Limited

Anwar A. Khan ¹, Sadanand Bimal ², K. K. Dey ³, S. S. Roy ³

Affiliations
1 Ranchi University, Ranchi – 834008, IN
2 B. I. T. Sindri – 828123, Dhanbad (Jharkhand), IN
3 Electronics laboratory, University department of physics, R. U. Ranchi –834008, IN

Abstract

The work presented in the paper develops a methodology for the design of sinusoidal oscillator based on simulation of differential equation using second generation current conveyors. A practical circuit using the IC AD844 configured as current conveyor (CCII+) with CMOS analog switch DG201 illustrates the methodology. Experimental results are given. The scheme is suitable for frequencies below 1MHZ.

Keywords

Current Conveyor, IC AD844, Sinusoidal Waveform Generation, RC Oscillator

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A. Mahapatra ¹, S. S. Roy ¹, A. Chatterjee ¹

Affiliations
1 Central Mechanical Engineering Research Institute, M.G. Avenue, Durgapur, IN

Abstract

Virtual Reality (VR) is well introduced and highly accepted in the international society of institutional research. It is intuitively the correct man machine interface for all product design process stages. The application of VR in manufacturing possesses immense potential and challenges, both in the field of research and industrial applications. Manufacturing industry in particular the aerospace and automotive industry shares this excitement about VR. Research has provided a virtual manufacturing (VM) environment to these industries for simulating process design and reducing the cost. The potential future role of VR in manufacturing is discussed at the end of the text.

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S. S. Roy ¹

Affiliations
1 Centrai Mechanicai Engineering Research Institute, M.G. Avenue, Durgapur-713209, IN

Abstract

Ultra-precision diamond turning is widely used in the manufacturing of high precision components with a surface roughness of a few nanometers and with a tolerance which is in submicrometer range. Conventionally, the setup parameters for the diamond turning process are usually selected with the aid of trial cutting experiments, which are both time consuming and costly. Moreover, the surface roughness of the product depends on the experience of an operator and the machining environment. There is a need for the development of a simulation system which is capable of predicting the surface roughness of a workpiece and optimizing cutting conditions. In the present work, an attempt has been made to design an optimized fuzzy inference system using genetic aigorithm, so that the surface roughness in ultra-precision diamond turning of metal matrix composite can be modeled for set of input parameters, namely spindle speed, feed rate and depth of cut. As Genetic Algorithm (GA) is computationally expensive, the GA based training is done off-line. Once trained, the GA-tuned Fuzzy Inference System (GAFIS) will be able to predict surface roughness in ultra-precision diamond turning of AI6061/ SiCp Metal Matrix Composite before conducting actual experiment. The surface roughness obtained using proposed GAFIS is compared with the experimental results.

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S. V. Ngachan ¹, S. S. Roy ²

Affiliations
1 ICAR Researcli Complex for NEIH Region, Umroi Road, Umiam, Meghalay, IN
2 ICAR Research Complex for NEH Region, Manipur Centre, Imphal, IN

Abstract

The North Eastern Hill region offers scope for cultivation of a wide variety of horticultural crops such as fruits, vegetables, flowers, tuber crops, spices and plantation crops because of its diversities in topography, altitude and climatic conditions. The fruits grown in this region range from tropical and sub-tropical fruits like banana, papaya, pineapple, jack fruit and citrus to temperate fruits like apple, pear, peach, plum, strawberry and even certain nut fruits. The region has rich diversity of different vegetable crops and both indigenous tropical vegetables and temperate vegetables are grown to a considerable extent. Among the flowering plants special mention may be made about the orchids, where about 600 species are reported to occur in the region alone. The other commercial flowers of the region are marigold, tuberose, gladiolus, gerbera and chrysanthemum. Recently rose, gerbera, anthurium and liliums etc. are introduced in the region. Tuber and rhizomatous crops like tapioca (cassava), sweet potato, Dioscorea, colocasia, ginger and turmeric grow abundantly in the region, while plantation crops like tea, coconut, arecanut, cashewnut have considerable impact on the economy of the tropical and sub-tropical parts. The region is the big reservoir of medicinal and aromatic plants. Besides, many other indigenous fruits and vegetables like prunus berry, tree bean, tree tomato, edible bamboo etc. are found in the hilly terrains that can be explored for processing and value addition.

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S. S. Roy ¹, M. A. Ansari ¹, S. K. Sharma ¹, B. Sailo ¹, Ch. Basudha Devi ¹, I. M. Singh ¹, Anup Das ¹, D. Chakraborty ², A. Arunachalam ³, N. Prakash ¹, S. V. Ngachan ²

Affiliations
1 ICAR Research Complex for NEH Region, Manipur Centre, Imphal 795 004, IN
2 ICAR Research Complex for NEH Region, Umiam 793 103, IN
3 Indian Council of Agricultural Research, New Delhi 110 012, IN

Abstract

Manipur in India is endowed with rich biodiversity and abundant natural resources. Despite inaccessibility, marginality and heterogeneity, the state has made good progress in agriculture and allied sectors. About 80% of the state population depends on agriculture for livelihood. However, agriculture sector in Manipur is facing the consequences of climate change. Climate change is a reality and an increasing trend in temperature, precipitation and emission of greenhouse gases has been observed in Manipur. The state is also projected to experience more of extreme rainfall and reduction in crop yields. As subsistence level farming is coupled with prevalent shifting cultivation, the small and marginal farmers will be most affected due to climate change. Hence, there is an urgent need for devising climate proof plan and climate ready policy for climate compatible agricultural development in Manipur. Location-specific climate smart technology baskets need to be devised or introduced and should be demonstrated through participatory approach, for ensuring a climate resilient production system, and a climate resilient ecosystem. The interactions between the system’s adaptation strategies and the mitigation potential should also be given due importance in the action plan for combating climate change. This article deals with the present status of agriculture and allied sector and various technological and policy options for climate resilient agriculture in the hill and mountain ecosystems of Manipur.

Keywords

Climate Smart Agriculture, Climate Change, Northeast India.

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