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Karnataka, India

Davangere University is a public state university located in Davangere, Karnataka, India. The university was established in the year 2008 by the Government of Karnataka. Wikipedia.

Arun Kumar M.B.,Government Engineering College | Swamy R.P.,Davangere University
ARPN Journal of Engineering and Applied Sciences | Year: 2011

Flyash-eglass-Al6061 alloy composites having 2 wt%, 4 wt%, 6wt% and 8wt% of flyash and 2 wt% and 6wt % of e-glass fiber were fabricated by liquid metallurgy (stir cast) method. The casted composite specimens were machined as per test standards. The specimens were tested to know the common casting defects using ultra-sonic flaw detector testing system. Some of the mechanical properties have been evaluated and compared with Al6061 alloy. Significant improvement in tensile properties, compressive strength and hardness are noticeable as the wt % of the flyash increases. The microstructures of the composites were studied to know the dispersion of the flyash and e-glass fiber in matrix. It has been observed that addition of flyash significantly improves ultimate tensile strength along with compressive strength and hardness properties as compared with that of unreinforced matrix. © 2006-2011 Asian Research Publishing Network (ARPN). Source

Suresh R.,Canara Engineering College | Basavarajappa S.,Davangere University | Samuel G.L.,Indian Institute of Technology Madras
Measurement: Journal of the International Measurement Confederation | Year: 2012

Hard turning with multilayer coated carbide tool has several benefits over grinding process such as, reduction of processing costs, increased productivities and improved material properties. The objective was to establish a correlation between cutting parameters such as cutting speed, feed rate and depth of cut with machining force, power, specific cutting force, tool wear and surface roughness on work piece. In the present study, performance of multilayer hard coatings (TiC/TiCN/Al 2O 3) on cemented carbide substrate using chemical vapor deposition (CVD) for machining of hardened AISI 4340 steel was evaluated. An attempt has been made to analyze the effects of process parameters on machinability aspects using Taguchi technique. Response surface plots are generated for the study of interaction effects of cutting conditions on machinability factors. The correlations were established by multiple linear regression models. The linear regression models were validated using confirmation tests. The analysis of the result revealed that, the optimal combination of low feed rate and low depth of cut with high cutting speed is beneficial for reducing machining force. Higher values of feed rates are necessary to minimize the specific cutting force. The machining power and cutting tool wear increases almost linearly with increase in cutting speed and feed rate. The combination of low feed rate and high cutting speed is necessary for minimizing the surface roughness. Abrasion was the principle wear mechanism observed at all the cutting conditions. © 2012 Published by Elsevier Ltd. All rights reserved. Source

Latha Shankar B.,Siddaganga Institute of Technology | Basavarajappa S.,Davangere University | Kadadevaramath R.S.,Siddaganga Institute of Technology | Chen J.C.H.,Gonzaga University
Expert Systems with Applications | Year: 2013

This paper considers simultaneous optimization of strategic design and distribution decisions for three-echelon supply chain architecture consisting of following three players; suppliers, production plants, and distribution centers (DCs). The key design decisions considered are: the number and location of plants in the system, the flow of raw materials from suppliers to plants, the quantity of products to be shipped from plants to distribution centers, so as to minimize the combined facility location, production, inventory, and shipment costs and maximize fill rate. To achieve this, three-echelon network model is mathematically represented and solved using swarm intelligence based Multi-objective Hybrid Particle Swarm Optimization algorithm (MOHPSO). This heuristic incorporates non-dominated sorting (NDS) procedure to achieve bi-objective optimization of two conflicting objectives. The applicability of proposed optimization algorithm was then tested by applying it to standard test problems found in literature. On achieving comparable results, the approach was applied to actual data of a pump manufacturing industry. The results show that the proposed solution approach performs efficiently. © 2013 Elsevier Ltd. All rights reserved. Source

Kiran T.S.,Kalpataru Institute of Technology | Prasanna Kumar M.,Visvesvaraya Technological University | Basavarajappa S.,Davangere University | Viswanatha B.M.,Kalpataru Institute of Technology
Materials and Design | Year: 2014

Dry sliding wear behavior of zinc based alloy and composite reinforced with SiCp (9. wt%) and Gr (3. wt%) fabricated by stir casting method was investigated. Heat treatment (HT) and aging of the specimen were carried out, followed by water quenching. Wear behavior was evaluated using pin on disc apparatus. Taguchi technique was used to estimate the parameters affecting the wear significantly. The effect of HT was that it reduced the microcracks, residual stresses and improved the distribution of microconstituents. The influence of various parameters like applied load, sliding speed and sliding distance on wear behavior was investigated by means and analysis of variance (ANOVA). Further, correlation between the parameters was determined by multiple linear regression equation for each response. It was observed that the applied load significantly influenced the wear volume loss (WVL), followed by sliding speed implying that increase in either applied load or sliding speed increases the WVL. Whereas for composites, sliding distance showed a negative influence on wear indicating that increase in sliding distance reduces WVL due to the presence of reinforcements. The wear mechanism of the worn out specimen was analyzed using scanning electron microscopy. The analysis shows that the formation and retention of ceramic mixed mechanical layer (CMML) plays a major role in the dry sliding wear resistance. © 2014 Elsevier Ltd. Source

Shettar A.,Kuvempu University | Muttagi G.,Kuvempu University | Muttagi G.,Davangere University
Peptides | Year: 2012

In view of the observations that Schwann cells contain insulin receptors, in the present study, we have investigated the developmental regulation of insulin receptor gene in the sciatic nerves of different postnatal age group rats. We have also investigated the role of insulin in the expression of the major PNS myelin glycoprotein P zero (P0) in normal as well as high glucose conditions in primary rat Schwann cells. The expression of insulin receptor gene in sciatic nerves appeared to be differentially regulated. The steady-state levels of insulin receptor mRNA increased remarkably during development and after postnatal day 10, when the peak of myelin structural gene (P0) expression occur and slowly increased further until at least postnatal day 90 in parallel with the growth of the myelin sheath. By employing immunofluorescence and RT-PCR, we observed significant increase in the P0 protein and mRNA levels in Schwann cells in response to the insulin than in insulin deprived counterparts. The presence of insulin in the high glucose medium ameliorated the altered protein and mRNA of P0 in Schwann cells compared to the insulin deprived counterparts. These studies demonstrate the importance of insulin and its receptor as possible regulatory factors in the PNS and also emphasizes their novel therapeutic applications in demyelinating diseases, especially in diabetic poly-neuropathy. © 2012 Elsevier Inc. Source

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