554 research outputs found
Biochar: a sustainable solution for solid waste management in agro-processing industries [Latest Articles]
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An experimental and theoretical investigation on torrefaction of a large wet wood particle
No full textBiochar as a filler in glassfiber reinforced composites: Experimental study of thermal and mechanical properties
No full textContract Farming of Ginger in Nepal, 2014
No full textThe data is collected through a primary field survey of around 600 ginger-cultivating farm households in Nepal, using a structured questionnaire. It aims at identifying the determinants of participation in contract farming of ginger in Nepal and assess impact of contract on farmers’ profits and adoption of food safety practices at farm-level. The data includes farm and farmer characteristics, cropping pattern, economics of cultivation, marketing channels, and good agricultural practices. The survey was conducted during December 2014 in the hill districts of Pyuthan, Palpa, and Arghakhanchi, located in the Western and Mid-western development regions of Nepal. These districts were chosen due to high concentration of contract farmers there. The sample comprises 322 contract farmers and 283 noncontract farmers.IFPRI1; Open Access;SAR
A mixed finite element method for elliptic optimal control problems using a three-field formulation
No full textIn this paper, we consider an optimal control problem governed by elliptic differential equations posed in a three-field formulation. Using the gradient as a new unknown we write a weak equation for the gradient using a Lagrange multiplier. We use a biorthogonal system to discretise the gradient, which leads to a very efficient numerical scheme. A numerical example is presented to demonstrate the convergence of the finite element approach.
References D. Boffi, F. Brezzi, and M. Fortin. Mixed finite element methods and applications. Springer–Verlag, 2013. doi:10.1007/978-3-642-36519-5. S.C. Brenner and L.R. Scott. The Mathematical Theory of Finite Element Methods. Springer–Verlag, New York, 1994. doi:10.1007/978-0-387-75934-0. Yanping Chen. Superconvergence of quadratic optimal control problems by triangular mixed finite element methods. International journal for numerical methods in engineering, 75(8):881–898, 2008. doi:10.1002/nme.2272. Hongfei Fu, Hongxing Rui, Jian Hou, and Haihong Li. A stabilized mixed finite element method for elliptic optimal control problems. Journal of Scientific Computing, 66(3):968–986, 2016. doi:10.1007/s10915-015-0050-3. Hui Guo, Hongfei Fu, and Jiansong Zhang. A splitting positive definite mixed finite element method for elliptic optimal control problem. Applied Mathematics and Computation, 219(24):11178–11190, August 2013. doi:10.1016/j.amc.2013.05.020. Muhammad Ilyas and Bishnu P. Lamichhane. A stabilised mixed finite element method for the poisson problem based on a three-field formulation. In M. Nelson, D. Mallet, B. Pincombe, and J. Bunder, editors, Proceedings of EMAC-2015, volume 57 of ANZIAM J., pages C177–C192. Cambridge University Press, 2016. doi:10.21914/anziamj.v57i0.10356. Bishnu P Lamichhane, AT McBride, and BD Reddy. A finite element method for a three-field formulation of linear elasticity based on biorthogonal systems. Computer Methods in Applied Mechanics and Engineering, 258:109–117, 2013. doi:10.1016/j.cma.2013.02.008. B.P. Lamichhane. Inf-sup stable finite element pairs based on dual meshes and bases for nearly incompressible elasticity. IMA Journal of Numerical Analysis, 29:404–420, 2009. doi:10.1093/imanum/drn013. B.P. Lamichhane. A mixed finite element method for the biharmonic problem using biorthogonal or quasi-biorthogonal systems. Journal of Scientific Computing, 46:379–396, 2011. doi:10.1007/s10915-010-9409-7. B.P. Lamichhane and E. Stephan. A symmetric mixed finite element method for nearly incompressible elasticity based on biorthogonal systems. Numerical Methods for Partial Differential Equations, 28:1336–1353, 2012. doi:10.1002/num.20683. Xianbing Luo, Yanping Chen, and Yunqing Huang. Some error estimates of finite volume element approximation for elliptic optimal control problems. International Journal of Numerical Analysis and Modeling, 10(3):697–711, 2013. http://www.math.ualberta.ca/ijnam/Volume-10-2013/No-3-13/2013-03-11.pdf. Fredi Troltzsch. On finite element error estimates for optimal control problems with elliptic PDEs. In International Conference on Large-Scale Scientific Computing, pages 40–53. Springer, 2009. doi:10.1007/978-3-642-. Fredi Troltzsch. Optimal control of partial differential equations, volume 112. American Mathematical Society, 2010. http://www.ams.org/books/gsm/112/
Voting under temptation
No full textWithin the confines of linear tax and complete market, we show that the efficiency force for a negative capital tax may not be strong enough to reverse the politico-economic force for a positive redistributive taxation under temptation and self-control preferences. (C) 2012 Elsevier B.V. All rights reserved.EconomicsSSCI0ARTICLE3419-42311
Remote Control of Liquid Crystal Elastomer Random Laser
No full textWe demonstrate random lasing in a composite system fabricated from elastomeric liquid crystals and TiO2 nanoparticles. By moving this random laser near the focal plane of the pump beam, we achieve control of its emission properties
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