Loading...
Theses
Browse
2 results
Search Results
ThesisItem Open Access Design, development and performance evaluation of hand operated coating machine for horticultural produce(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2018-08) Sumit Kumar; Khan ChandEdible coating is a preservation technique that increases the shelf life of horticultural produce and also maintain its quality characteristics during storage. This technique of horticultural produce preservation has been in use since long back in post harvest processing industries. Application of coating solution on horticultural produce is doing using dipping, spraying, panning and fluidized bed coating methods. In industries spraying coating machine is available for coating of horticultural produce. Coating machines are not available in market for commercial horticultural produce producers. Therefore, it has become essential to develop hand operated coating machine for commercial use of producers. Large amount of fruits and vegetables produces in whole world every year and around 40-45 % of it gets wastage due to improper post harvest management. Therefore, this research work was undertaken to develop hand operated coating machine for horticultural produce which is round in shape that aimed to shelf life enhancement. Hand operated coating machine working on the principle of reciprocating motion of perforated plate upward and downward was designed and fabricated. The cost of hand operated coating machine was Rs. 20540. The hand operated coating machine was designed by studying the physical and mechanical properties of apple fruit and was fabricated in the department of Post Harvest Process and Food Engineering, G. B. Pant university of agriculture and technology, Pantnagar. The physical and mechanical properties of apple fruit was calculated at the initial moisture content of 80 % (w.b) and average value of length, width and thickness of apples were 64.35±1.20 mm, 62.71±2.1 mm and 59.30±0.8 mm respectively. The geometric mean diameter, bulk density and angle of repose were found to be 7.9-8.5 mm, 460-170 kg/m3 and 19-200. Machine coating efficiency, change in colour and coating machine capacity were determined in range of 71-93 %, 14.58-32.35 and 30 kg/hr, respectively. A best performance of coating machine for maximum machine coating efficiency were found to 0 m/s dryer air velocity and 6 s dipping time and model was found to be significant.ThesisItem Open Access Threshold sensitive energy efficient multi-sink routing protocol for heterogeneous wireless sensor networks(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-08) Sumit Kumar; Mishra, P. K.The prominence of Wireless Sensor Networks (WSN) has expanded massively in late time because of development in Micro-Electro-Mechanical Systems (MEMS) innovation. WSN has the possibility to associate the physical world with the virtual world by framing a system of sensor nodes. Here, sensor nodes are typically battery-driven gadgets, and consequently energy consumption of sensor nodes is a noteworthy design issue. This thesis addresses ‘WSN’s lifetime and stability period optimization problem” which is to design an energy efficient protocol in such a way that energy consumption of every node in the wireless sensor networks is minimized which results in an improved stability period and prolonged lifetime of WSNs. This thesis solves the problem by introducing a static clustering based multi-sink routing protocol for heterogeneous wireless sensor networks. The idea of threshold aware transmission is also utilized to accomplish these objectives. The results are compared with two well known traditional clustering protocols namely LEACH and SEP using stability period, network lifetime, instability period and throughput as performance metrics. The proposed work performs better than the other protocols under consideration.