SIMULATION OF A FLOW THROUGH A RIGID POROUS MEDIUM SUBJECTED TO A CONSTRAINT

This work uses a previuosly proposed mathematical model to study the filling up of an unsaturated rigid porous medium by a liquid identifying the transition from unsaturated to saturated flow. This model accounts for the physical upper bound of the fluid fraction that depends on the volume of the pores and employs a mixture theory to describe the flow. The mathematical description of the phenomenon leads to a nonlinear hyperbolic system. In order to solve this system, the space of admissible solutions must be enlarged to admit discontinuous solutions that may be shock waves. The complete solution of a Riemann problem associated to the system of conservation laws satisfying the constraint given by the saturation upper bound is presented. Some meaningful results are presented and discussed

SIMULATION OF A FLOW THROUGH A RIGID POROUS MEDIUM SUBJECTED TO A CONSTRAINT

ABSTRACT This work uses a previuosly proposed mathematical model to study the filling up of an unsaturated rigid porous medium by a liquid identifying the transition from unsaturated to saturated flow. This model accounts for the physical upper bound of the fluid fraction that depends on the volume of the pores and employs a mixture theory to describe the flow. The mathematical description of the phenomenon leads to a nonlinear hyperbolic system. In order to solve this system, the space of admissible solutions must be enlarged to admit discontinuous solutions that may be shock waves. The complete solution of a Riemann problem associated to the system of conservation laws satisfying the constraint given by the saturation upper bound is presented. Some meaningful results are presented and discussed

A hierarchical model for the cash transfer system design problem

This paper presents a hierarchical model that incorporates strategic, tactical, and operational decisions of cash transfer management system of a bank. The aim of the model is to decide on the location of cash management centers, the number and routes of vehicles, and the cash inventory management policies to minimize the cost of owning and operating a cash transfer system while maintaining a pre-defined service level. Owing to the difficulty of finding optimal decisions in such integrated models, an iterative solution approach is proposed in which strategic, tactical, and operational problems are solved separately via a feedback mechanism. Numerical results show that such an approach is quite effective in reaching at greatly improved solutions with just a few iterations, making it a very promising approach for similar models

A História da Alimentação: balizas historiográficas

Os M. pretenderam traçar um quadro da História da Alimentação, não como um novo ramo epistemológico da disciplina, mas como um campo em desenvolvimento de práticas e atividades especializadas, incluindo pesquisa, formação, publicações, associações, encontros acadêmicos, etc. Um breve relato das condições em que tal campo se assentou faz-se preceder de um panorama dos estudos de alimentação e temas correia tos, em geral, segundo cinco abardagens Ia biológica, a econômica, a social, a cultural e a filosófica!, assim como da identificação das contribuições mais relevantes da Antropologia, Arqueologia, Sociologia e Geografia. A fim de comentar a multiforme e volumosa bibliografia histórica, foi ela organizada segundo critérios morfológicos. A seguir, alguns tópicos importantes mereceram tratamento à parte: a fome, o alimento e o domínio religioso, as descobertas européias e a difusão mundial de alimentos, gosto e gastronomia. O artigo se encerra com um rápido balanço crítico da historiografia brasileira sobre o tema

HYPERBOLIC DESCRIPTION OF CONTAMINATED FLOW THROUGH AN UNSATURATED WELLBORE

This work studies the flow of a mixture of two fluids – a Newtonian fluid and a pollutant – through a rigid cylindrical shell porous matrix. Aiming to build a preliminary local model for the flow of a Newtonian fluid containing a pollutant through a wellbore, a mixture theory approach is employed. The mixture consists of four overlapping continuous constituents: one solid (porous medium), one liquid (Newtonian fluid), the pollutant (solid, liquid or gas) and an inert gas included to account for the compressibility of the mixture as a whole. Assuming the flow on radial direction only, a set of three nonlinear partial differential equations describes the problem. Combining Glimm’s scheme with an operator splitting technique to account for the non-homogeneous part of the hyperbolic operator, the resulting nonlinear hyperbolic system is numerically approximated. Representative results illustrating the numerical methodology are presented

Integrated analysis of shotgun proteomic data with PatternLab for proteomics 4.0

Submitted by Luciane Willcox ([email protected]) on 2016-09-14T18:42:23Z No. of bitstreams: 1 Integrated analysis of shotgun proteomic data.pdf: 5689932 bytes, checksum: d05baca4adc848b8a5eca5ff7f53f2f8 (MD5)Approved for entry into archive by Luciane Willcox ([email protected]) on 2016-10-07T17:50:10Z (GMT) No. of bitstreams: 1 Integrated analysis of shotgun proteomic data.pdf: 5689932 bytes, checksum: d05baca4adc848b8a5eca5ff7f53f2f8 (MD5)Made available in DSpace on 2016-10-07T17:50:10Z (GMT). No. of bitstreams: 1 Integrated analysis of shotgun proteomic data.pdf: 5689932 bytes, checksum: d05baca4adc848b8a5eca5ff7f53f2f8 (MD5) Previous issue date: 2015-12-10Fundação Oswaldo Cruz. Instituto Carlos Chagas. Grupo de Proteômica e Espectrometria de Massas Computacional. Curitiba, PR, Brasil / Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Toxinologia. Rio de Janeiro, RJ, Brasil.Fundação Oswaldo Cruz. Instituto Carlos Chagas. Grupo de Proteômica e Espectrometria de Massas Computacional. Curitiba, PR, Brasil.Fundação Oswaldo Cruz. Instituto Carlos Chagas. Grupo de Proteômica e Espectrometria de Massas Computacional. Curitiba, PR, Brasil / Department of Pathology. University of Michigan. Ann Arbor, Michigan, USA.Fundação Oswaldo Cruz. Instituto Carlos Chagas. Grupo de Proteômica e Espectrometria de Massas Computacional. Curitiba, PR, Brasil.Fundação Oswaldo Cruz. Instituto Carlos Chagas. Grupo de Proteômica e Espectrometria de Massas Computacional. Curitiba, PR, Brasil.Fundação Oswaldo Cruz. Instituto Leônidas e Maria Deane. Manaus, AM, Brasil.Universidade Federal do Rio de Janeiro. Programa de Engenharia de Sistemas de Computação. Rio de Janeiro, RJ, Brasil.Laboratory for Biological Mass Spectrometry. The Scripps Research Institute. La Jolla, California, USA.Laboratory for Biological Mass Spectrometry. The Scripps Research Institute. La Jolla, California, USA