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Discriminatory Projection of Camouflaged Texture Through Line Masks
( Nagappa Bhajantri ),( Pradeep Kumar R ),( Nagabhushan P ) 한국정보처리학회 2013 Journal of information processing systems Vol.9 No.4
The blending of defective texture with the ambience texture results in camouflage. The gray value or color distribution pattern of the camouflaged images fails to reflect considerable deviations between the camouflaged object and the sublimating background demands improved strategies for texture analysis. In this research, we propose the implementation of an initial enhancement of the image that employs line masks, which could result in a better discrimination of the camouflaged portion. Finally, the gray value distribution patterns are analyzed in the enhanced image, to fix the camouflaged portions.
Preparation and Curing Studies of Maleimide Bisphenol-A Based Epoxy Resins
Shivananda Kammasandra Nanjunda Gowda,Kadidal Nagappa Mahendra* 대한화학회 2006 Bulletin of the Korean Chemical Society Vol.27 No.10
Maleimide modified epoxy compounds were prepared by reacting N-(4-hydroxyphenyl) maleimide (HPM) with diglycidylether of bisphenol-A. Triphenylphosphine was used as catalyst and methylethylketone as solvent. The resulting compound possessed both the oxirane ring and maleimide group. The curing reaction of the maleimide epoxy compound with amine curing agents such as 1-(2-aminoethyl) piperazine (AEP) and 5-amino-1,3,3-trimethylcyclohexane methylamine isophorone diamine, IPDA) were studied. Incorporation of maleimide groups in the epoxy resin provides cyclic imide structure and high cross-linking density to the cured resins. The cured samples were found to have good thermal stability, chemical resistance (acid/alkali/solvent) and water absorption resistance.
Preparation and Curing Studies of Maleimide Bisphenol-A Based Epoxy Resins
Nanjunda Gowda, Shivananda Kammasandra,Mahendra, Kadidal Nagappa Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.10
Maleimide modified epoxy compounds were prepared by reacting N-(4-hydroxyphenyl) maleimide (HPM) with diglycidylether of bisphenol-A. Triphenylphosphine was used as catalyst and methylethylketone as solvent. The resulting compound possessed both the oxirane ring and maleimide group. The curing reaction of the maleimide epoxy compound with amine curing agents such as 1-(2-aminoethyl) piperazine (AEP) and 5-amino-1,3,3-trimethylcyclohexane methylamine isophorone diamine, IPDA) were studied. Incorporation of maleimide groups in the epoxy resin provides cyclic imide structure and high cross-linking density to the cured resins. The cured samples were found to have good thermal stability, chemical resistance (acid/alkali/solvent) and water absorption resistance.
Thickness Optimization of ZnO/CdS/CdTe Solar Cell by Numerical Simulation
Devanshi Parashar,V. S. Ganesha Krishna,Sahana Nagappa Moger,Rashmitha Keshav,M. G. Mahesha 한국전기전자재료학회 2020 Transactions on Electrical and Electronic Material Vol.21 No.6
CdTe based solar cells with high effi ciency alternative to solar cells from elemental semiconductors is an important work carried out over the decades. However, the research has not yet yielded the highest possible effi ciency with CdTe absorber. Selection of suitable window layer and optimizing the thickness of the diff erent layers is still a quest in researchers. Numerical simulation of the diff erent material combinations can speed up the research work. In this regard, numerical simulation is an essential tool to fi nd the optimized structure for the enhanced device performance. In the present work, the thicknesses of window and absorber layers, one of the crucial factors that aff ect the solar cell performance, are tuned for ZnO/CdS/CdTe system. In case of CdS/CdTe solar cells, spectral loss created by CdS lowers the cell effi ciency. Concept of bilayer window is useful to minimize the loss at window layer. Hence the ZnO/CdS bilayer window is adopted and demonstrated that the cell effi ciency can be increased up to 17.66% with current density of 28.4 mA/cm 2 and 73.7% fi ll factor.
Comparative study of Metallic and Polymer Composite Shells for Underwater Vessels Using FEA
Govindaraj, Moorthy,Narayanarao, Narasimha Murthy Heddale,Munishaiah, Krishna,Nagappa, Raghavendra Korean Society of Ocean Engineers 2013 International journal of ocean system engineering Vol.3 No.3
The present research was aimed at comparing performance of metallic and polymer composite shells of a typical underwater vessel of length and inner diameter of 1650 mm and 350 mm respectively, based on the critical buckling pressure for operating depth of 1000 m using ANSYS. High strength steel, aluminium alloy, titanium alloy, glass / epoxy and carbon / epoxy materials were examined. The results indicated weight savings of 46 % in carbon/epoxy and 31 % in glass / epoxy when compared with high strength steel, based on the thickness of the shell for sustaining 10 MPa buckling pressure.