publications:
- title: "Error concealment by means of motion refinement and regularized bregman divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Felipe Pereira do Carmo"
    link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2012"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    published: "https://researchr.org/publication/citeulike%3A11098377"
  researchr: "https://researchr.org/publication/preprint-citeulike%3A11098377"
  cites: 0
  citedby: 0
  type: "Preprint"
  kind: "techreport"
  key: "preprint-citeulike:11098377"
- title: "Methodology for Optimization of Polymer Blends Composition"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Gil de Carvalho"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=P84906"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  year: "2012"
  doi: "10.5772/2693"
  abstract: "The research of polymer blends, or alloys, has experienced enormous growth in size and sophistication in terms of its scientific base, technology and commercial development (Paul & Bucknall, 2000). As a consequence two very important issues arise: the increased availability of new materials and the need for materials with better performance. Polymer blends are polymer systems originated from the physical mixture of two or more polymers and/or copolymers, without a high degree of chemical reactions between them. To be considered a blend, the compounds should have a concentration above 2% in mass of the second component (Hage & Pessan, 2001; Ihm & White, 1996). However, the commercial viability of new polymers has begun to become increasingly difficult, due to several factors. The advantages of polymer blends lie in the ability to combine existing polymers into new compositions obtaining in this way, materials with specific properties. This strategy allows for savings in research and development of new materials with equivalent properties, as well as versatility, simplicity, relatively low cost (Koning et al., 1998) and faster development time of new materials (Silva, 2011). Rossini (2005) mentions that economically and environmentally, a very viable alternative is to replace the recycling of pure polymers by mixtures of discarded materials. Mechanical recycling causes the breakdown of polymer chains, which impairs the properties of polymers. This degradation is directly proportional to the number of cycles of recycling. Therefore, the blend of two or more discarded polymers can be a realistic alternative, since it can result in materials with very interesting properties, at a low cost. Besides its inexpensiveness, this choice is also a smart solution to the reutilization of garbage. Postconsumption package disposal always occurs in a disorderly manner and without regard for the environment. The recycling process becomes increasingly more important and necessary to remediate environmental impact. According Pang et al. (2000) apud Marconcini & Ruvolo Filho (2006) polyolefins such as high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) and polyesters such as poly (ethylene terephthalate) (PET) are classes of thermoplastics that have been widely used in packaging and constitute a large part of post-consumer waste. The recycling of these materials and their mechanical characterization anticipating the possibility of a new cycle of life in the form of new products is challenging, although technologically and environmentally correct (Marconcini & Ruvolo Filho, 2006). The polymer blends can be obtained basically in two ways (Rossini, 2005):  By dissolving the polymers in a good solvent, common to them, and subsequently letting the solvent evaporate; and  In a mixer where the working temperature is high enough to melt or mollify the polymeric components, without causing degradation of the same. According to Wessler (2007), the polymer blends may be miscible or immiscible. The miscibility is the most important property to be analyzed in a blend, given that all other system properties depend on the number of phases, their morphology and adhesion between them. The miscibility term is directly related to the solubility, i.e., a blend is miscible when the polymers dissolve in each other mutually (Silva, 2011). The immiscible between the various engineering polymers is a limiting factor for its production. Thus, it is necessary to use compatibilization agents for their production. Computational modeling has become increasingly popular. The main objective of models is to assist process optimization with minimal investment of time and resources for experimental work. Most techniques are classified into two main groups: physical models and statistical models as shown by Malinov & Sha (2003). Statistical methods are chosen according to research objectives. There are several multivariate analysis methods for purposes quite different from each other. The desired value and quality of one or more product characteristics can be obtained via experiment analysis and DOE. These methods help determining optimal settings and controllable factors of a process such as: temperature, pressure, amount of reagents, operating time, etc.. When compared to the method of trial and error, DOE also allows a reduction of the number of required tests, and savings in time, labor and money. An important application of DOE is the optimization of experimental formulations as, for example, the composition of mixtures. The formulation development is a fundamental part of the food industry, chemicals, plastics, rubber, paints, medicines, and the like. In materials science, it is important to understand the correlation between material processing, microstructure and properties that enable the optimization of process parameters and compositions of materials to achieve the desired combination of properties, according Malinov & Sha (2003). The problem presented here is to determine the fraction of each polymer blend component, and to determine the agent or, in some cases, an agents system, when it is necessary to use more than one compatibilizing agent. Thus, this text studies the effect of factors, for example, amount of polypropylene, additive type, and amount of additive in the composition of polymer blends, i.e., the optimal polymer blends formulation using factorial design."
  links:
    "url": "http://www.intechopen.com/books/principal-component-analysis-engineering-applications/methodology-for-optimization-of-polymer-blends-composition"
  tags:
  - "control systems"
  - "design science"
  - "rule-based"
  - "Recycling"
  - "operating system"
  - "Environmental Engineering "
  - "composition"
  - "design research"
  - "testing"
  - "type system"
  - "model-driven development"
  - "model-driven engineering"
  - "Engineering Design for Environment"
  - "Meta-Environment"
  - "process modeling"
  - "Sustainability"
  researchr: "https://researchr.org/publication/coelho2012methodology"
  cites: 32
  citedby: 1
  kind: "misc"
  key: "coelho2012methodology"
- title: "State-of-the Art Motion Estimation in the Context of 3D TV"
  author:
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793789Y3"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/57137696/the-prevalence-of-headache-among-elderly-in-a-low-income-area-of-s-o-paulo-brazil"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.jsp?id=K4793789Y3&mostrarNroCitacoesISI=true&mostrarNroCitacoesScopus=true&mostrarNroCitacoesScielo=true"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  year: "2012"
  doi: "10.4018/978-1-4666-2660-7.ch006"
  abstract: "Progress in image sensors and computation power has fueled studies to improve acquisition, processing, and analysis of 3D streams along with 3D scenes/objects reconstruction. The role of motion compensation/motion estimation (MCME) in 3D TV from end-to-end user is investigated in this chapter. Motion vectors (MVs) are closely related to the concept of disparities, and they can help improving dynamic scene acquisition, content creation, 2D to 3D conversion, compression coding, decompression/decoding, scene rendering, error concealment, virtual/augmented reality handling, intelligent content retrieval, and displaying. Although there are different 3D shape extraction methods, this chapter focuses mostly on shape-from-motion (SfM) techniques due to their relevance to 3D TV. SfM extraction can restore 3D shape information from a single camera data."
  links:
  tags:
  - "3D imaging"
  - "Inverse problems"
  - "motion compensation"
  - "image processing"
  - "Computer vision"
  - "Motion estimation"
  - "Error concealment"
  - "3D TV"
  - "multimedia"
  - "video analysis"
  - "stream processing"
  researchr: "https://researchr.org/publication/estrela2012state"
  cites: 109
  citedby: 5
  howpublished: "Paper and online"
  kind: "misc"
  key: "estrela2012state"
- title: "Methodology for Optimization of Polymer Blends Composition"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Gil de Carvalho"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=P84906"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  year: "2012"
  doi: "10.5772/2693"
  abstract: "The research of polymer blends, or alloys, has experienced enormous growth in size and sophistication in terms of its scientific base, technology and commercial development (Paul & Bucknall, 2000). As a consequence two very important issues arise: the increased availability of new materials and the need for materials with better performance. Polymer blends are polymer systems originated from the physical mixture of two or more polymers and/or copolymers, without a high degree of chemical reactions between them. To be considered a blend, the compounds should have a concentration above 2% in mass of the second component (Hage & Pessan, 2001; Ihm & White, 1996). However, the commercial viability of new polymers has begun to become increasingly difficult, due to several factors. The advantages of polymer blends lie in the ability to combine existing polymers into new compositions obtaining in this way, materials with specific properties. This strategy allows for savings in research and development of new materials with equivalent properties, as well as versatility, simplicity, relatively low cost (Koning et al., 1998) and faster development time of new materials (Silva, 2011). Rossini (2005) mentions that economically and environmentally, a very viable alternative is to replace the recycling of pure polymers by mixtures of discarded materials. Mechanical recycling causes the breakdown of polymer chains, which impairs the properties of polymers. This degradation is directly proportional to the number of cycles of recycling. Therefore, the blend of two or more discarded polymers can be a realistic alternative, since it can result in materials with very interesting properties, at a low cost. Besides its inexpensiveness, this choice is also a smart solution to the reutilization of garbage. Postconsumption package disposal always occurs in a disorderly manner and without regard for the environment. The recycling process becomes increasingly more important and necessary to remediate environmental impact. According Pang et al. (2000) apud Marconcini & Ruvolo Filho (2006) polyolefins such as high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) and polyesters such as poly (ethylene terephthalate) (PET) are classes of thermoplastics that have been widely used in packaging and constitute a large part of post-consumer waste. The recycling of these materials and their mechanical characterization anticipating the possibility of a new cycle of life in the form of new products is challenging, although technologically and environmentally correct (Marconcini & Ruvolo Filho, 2006). The polymer blends can be obtained basically in two ways (Rossini, 2005):  By dissolving the polymers in a good solvent, common to them, and subsequently letting the solvent evaporate; and  In a mixer where the working temperature is high enough to melt or mollify the polymeric components, without causing degradation of the same. According to Wessler (2007), the polymer blends may be miscible or immiscible. The miscibility is the most important property to be analyzed in a blend, given that all other system properties depend on the number of phases, their morphology and adhesion between them. The miscibility term is directly related to the solubility, i.e., a blend is miscible when the polymers dissolve in each other mutually (Silva, 2011). The immiscible between the various engineering polymers is a limiting factor for its production. Thus, it is necessary to use compatibilization agents for their production. Computational modeling has become increasingly popular. The main objective of models is to assist process optimization with minimal investment of time and resources for experimental work. Most techniques are classified into two main groups: physical models and statistical models as shown by Malinov & Sha (2003). Statistical methods are chosen according to research objectives. There are several multivariate analysis methods for purposes quite different from each other. The desired value and quality of one or more product characteristics can be obtained via experiment analysis and DOE. These methods help determining optimal settings and controllable factors of a process such as: temperature, pressure, amount of reagents, operating time, etc.. When compared to the method of trial and error, DOE also allows a reduction of the number of required tests, and savings in time, labor and money. An important application of DOE is the optimization of experimental formulations as, for example, the composition of mixtures. The formulation development is a fundamental part of the food industry, chemicals, plastics, rubber, paints, medicines, and the like. In materials science, it is important to understand the correlation between material processing, microstructure and properties that enable the optimization of process parameters and compositions of materials to achieve the desired combination of properties, according Malinov & Sha (2003). The problem presented here is to determine the fraction of each polymer blend component, and to determine the agent or, in some cases, an agents system, when it is necessary to use more than one compatibilizing agent. Thus, this text studies the effect of factors, for example, amount of polypropylene, additive type, and amount of additive in the composition of polymer blends, i.e., the optimal polymer blends formulation using factorial design."
  links:
    "url": "http://www.intechopen.com/books/principal-component-analysis-engineering-applications/methodology-for-optimization-of-polymer-blends-composition"
  tags:
  - "control systems"
  - "design science"
  - "rule-based"
  - "Recycling"
  - "operating system"
  - "Environmental Engineering "
  - "composition"
  - "design research"
  - "testing"
  - "type system"
  - "model-driven development"
  - "model-driven engineering"
  - "Engineering Design for Environment"
  - "Meta-Environment"
  - "process modeling"
  - "Sustainability"
  researchr: "https://researchr.org/publication/coelho2012methodology"
  cites: 32
  citedby: 1
  kind: "misc"
  key: "coelho2012methodology"
- title: "Error concealment by means of motion refinement and regularized bregman divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Felipe Pereira do Carmo"
    link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2012"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    published: "https://researchr.org/publication/citeulike%3A11098377"
  researchr: "https://researchr.org/publication/preprint-citeulike%3A11098377"
  cites: 0
  citedby: 0
  type: "Preprint"
  kind: "techreport"
  key: "preprint-citeulike:11098377"
- title: "Methodology for Optimization of Polymer Blends Composition"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Gil de Carvalho"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=P84906"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  year: "2012"
  doi: "10.5772/2693"
  abstract: "The research of polymer blends, or alloys, has experienced enormous growth in size and sophistication in terms of its scientific base, technology and commercial development (Paul & Bucknall, 2000). As a consequence two very important issues arise: the increased availability of new materials and the need for materials with better performance. Polymer blends are polymer systems originated from the physical mixture of two or more polymers and/or copolymers, without a high degree of chemical reactions between them. To be considered a blend, the compounds should have a concentration above 2% in mass of the second component (Hage & Pessan, 2001; Ihm & White, 1996). However, the commercial viability of new polymers has begun to become increasingly difficult, due to several factors. The advantages of polymer blends lie in the ability to combine existing polymers into new compositions obtaining in this way, materials with specific properties. This strategy allows for savings in research and development of new materials with equivalent properties, as well as versatility, simplicity, relatively low cost (Koning et al., 1998) and faster development time of new materials (Silva, 2011). Rossini (2005) mentions that economically and environmentally, a very viable alternative is to replace the recycling of pure polymers by mixtures of discarded materials. Mechanical recycling causes the breakdown of polymer chains, which impairs the properties of polymers. This degradation is directly proportional to the number of cycles of recycling. Therefore, the blend of two or more discarded polymers can be a realistic alternative, since it can result in materials with very interesting properties, at a low cost. Besides its inexpensiveness, this choice is also a smart solution to the reutilization of garbage. Postconsumption package disposal always occurs in a disorderly manner and without regard for the environment. The recycling process becomes increasingly more important and necessary to remediate environmental impact. According Pang et al. (2000) apud Marconcini & Ruvolo Filho (2006) polyolefins such as high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) and polyesters such as poly (ethylene terephthalate) (PET) are classes of thermoplastics that have been widely used in packaging and constitute a large part of post-consumer waste. The recycling of these materials and their mechanical characterization anticipating the possibility of a new cycle of life in the form of new products is challenging, although technologically and environmentally correct (Marconcini & Ruvolo Filho, 2006). The polymer blends can be obtained basically in two ways (Rossini, 2005):  By dissolving the polymers in a good solvent, common to them, and subsequently letting the solvent evaporate; and  In a mixer where the working temperature is high enough to melt or mollify the polymeric components, without causing degradation of the same. According to Wessler (2007), the polymer blends may be miscible or immiscible. The miscibility is the most important property to be analyzed in a blend, given that all other system properties depend on the number of phases, their morphology and adhesion between them. The miscibility term is directly related to the solubility, i.e., a blend is miscible when the polymers dissolve in each other mutually (Silva, 2011). The immiscible between the various engineering polymers is a limiting factor for its production. Thus, it is necessary to use compatibilization agents for their production. Computational modeling has become increasingly popular. The main objective of models is to assist process optimization with minimal investment of time and resources for experimental work. Most techniques are classified into two main groups: physical models and statistical models as shown by Malinov & Sha (2003). Statistical methods are chosen according to research objectives. There are several multivariate analysis methods for purposes quite different from each other. The desired value and quality of one or more product characteristics can be obtained via experiment analysis and DOE. These methods help determining optimal settings and controllable factors of a process such as: temperature, pressure, amount of reagents, operating time, etc.. When compared to the method of trial and error, DOE also allows a reduction of the number of required tests, and savings in time, labor and money. An important application of DOE is the optimization of experimental formulations as, for example, the composition of mixtures. The formulation development is a fundamental part of the food industry, chemicals, plastics, rubber, paints, medicines, and the like. In materials science, it is important to understand the correlation between material processing, microstructure and properties that enable the optimization of process parameters and compositions of materials to achieve the desired combination of properties, according Malinov & Sha (2003). The problem presented here is to determine the fraction of each polymer blend component, and to determine the agent or, in some cases, an agents system, when it is necessary to use more than one compatibilizing agent. Thus, this text studies the effect of factors, for example, amount of polypropylene, additive type, and amount of additive in the composition of polymer blends, i.e., the optimal polymer blends formulation using factorial design."
  links:
    "url": "http://www.intechopen.com/books/principal-component-analysis-engineering-applications/methodology-for-optimization-of-polymer-blends-composition"
  tags:
  - "control systems"
  - "design science"
  - "rule-based"
  - "Recycling"
  - "operating system"
  - "Environmental Engineering "
  - "composition"
  - "design research"
  - "testing"
  - "type system"
  - "model-driven development"
  - "model-driven engineering"
  - "Engineering Design for Environment"
  - "Meta-Environment"
  - "process modeling"
  - "Sustainability"
  researchr: "https://researchr.org/publication/coelho2012methodology"
  cites: 32
  citedby: 1
  kind: "misc"
  key: "coelho2012methodology"
- title: "Error concealment by means of clustered blockwise PCA"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Joaquim Teixeira de Assis"
    link: "http://lattes.cnpq.br/7307238902576135"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2009"
  doi: "http://dx.doi.org/10.1109/PCS.2009.5167442"
  abstract: "This paper analyzes two variants of Principal Component Analysis (PCA) for error-concealment: blockwise PCA and clustered blockwise PCA. They permit reliable and timely delivery of image and video data over the Internet. In block transform coding, the spatial redundancies inside blocks are removed, and the energy is compacted into a small number of coefficients after the transformation. Realistic communication channels are not error free, although the loss mechanism may vary widely from media to media. Data corruption may be caused by network congestion, thermal noise, switch noise, signal fade, bit-errors in noisy channels, cell loss in packet networks, etc.. Since the signals transmitted on real-world channels are highly compressed, independent of cause, the quality of images reconstructed from any corrupted data can be very unsatisfactory. Error concealment is intended to ameliorate the impact of channel impairments by utilizing a priori information about typical images in conjunction with available picture redundancy to provide subjectively acceptable renditions of affected picture regions. "
  links:
    doi: "http://dx.doi.org/10.1109/PCS.2009.5167442"
    dblp: "http://dblp.uni-trier.de/rec/bibtex/conf/pcs/CoelhoAE09"
  tags:
  - " principal component analysis"
  - "clustering"
  - " video"
  - "image processing"
  - "Computer vision"
  - "Motion estimation"
  - " region partitioning"
  - " motion detection"
  - "Error concealment"
  - " mixtures"
  - " streaming"
  researchr: "https://researchr.org/publication/CoelhoAE09"
  cites: 13
  citedby: 1
  pages: "1-4"
  booktitle: "2009 Picture Coding Symposium, PCS 2009, Chicago, IL, USA, May 6-8, 2009"
  publisher: "IEEE"
  isbn: "978-1-4244-4594-3"
  kind: "inproceedings"
  key: "CoelhoAE09"
- title: "Error concealment by means of clustered blockwise PCA"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Joaquim Teixeira de Assis"
    link: "http://lattes.cnpq.br/7307238902576135"
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793789Y3"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  year: "2009"
  doi: "http://dx.doi.org/10.1109/PCS.2009.5167442"
  abstract: "This paper analyzes two variants of Principal Component Analysis (PCA) for error-concealment: blockwise PCA and clustered blockwise PCA. Realistic communication channels are not error free. Since the signals transmitted on real-world channels are highly compressed, regardless of cause, the quality of images reconstructed from any corrupted data can be very unsatisfactory. Error concealment is intended to ameliorate the impact of channel impairments by utilizing a priori information about typical images in conjunction with available picture redundancy to provide subjectively acceptable renditions of affected picture regions. Some experiments have been performed with the two proposed algorithms and they are shown."
  links:
    doi: "http://dx.doi.org/10.1109/PCS.2009.5167442"
  tags:
  - "redundancy"
  - "data-flow"
  - "data-flow analysis"
  researchr: "https://researchr.org/publication/coelho2009error"
  cites: 13
  citedby: 6
  pages: "1-4"
  booktitle: "Picture Coding Symposium, 2009. PCS 2009"
  organization: "IEEE"
  publisher: "IEEE"
  kind: "inproceedings"
  key: "coelho2009error"
- title: "Data-Driven Motion Estimation with Spatial Adaptation more"
  author:
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793789Y3"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  researchr: "https://researchr.org/publication/estreladata"
  cites: 0
  citedby: 0
  journal: "International Journal of Image Processing"
  kind: "article"
  key: "estreladata"
- title: "Data-Driven Motion Estimation with Spatial Adaptation"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Estrela"
    link: "http://researchr.org/alias/v%C3%A2nia-vieira-estrela"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0"
  year: "2012"
  abstract: "Besides being an ill-posed problem, the pel-recursive computation of 2-D optical flow raises a wealth of issues, such as the treatment of outliers, motion discontinuities and occlusion. Our proposed approach deals with these issues within a common framework. It relies on the use of a data-driven technique called Generalized Cross Validation (GCV) to estimate the best regularization scheme for a given moving pixel. In our model, a regularization matrix carries information about different sources of error in its entries and motion vector estimation takes into consideration local image properties following a spatially adaptive. Preliminary experiments indicate that this approach provides robust estimates of the optical flow."
  links:
    "url": "http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.224.9608"
  tags:
  - " spatial adaptation"
  - "data validation"
  - "video processing"
  - " image motion estimation "
  - "meta-model"
  - "regularization"
  - "2D optical flow "
  - "image processing"
  - "Motion estimation"
  - " generalized cross-validation technique "
  - "information models"
  - " occlusion "
  - "Meta-Environment"
  - " regularization matrix "
  - " regularized pel-recursive algorithms "
  - "systematic-approach"
  researchr: "https://researchr.org/publication/citeulike%3A11966066"
  cites: 17
  citedby: 7
  pages: "54-67"
  booktitle: "INTERNATIONAL JOURNAL OF IMAGE PROCESSING (IJIP)"
  kind: "inproceedings"
  key: "citeulike:11966066"
- title: "Data-Driven Motion Estimation with Spatial Adaptation"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Estrela"
    link: "http://researchr.org/alias/v%C3%A2nia-vieira-estrela"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0"
  year: "2012"
  abstract: "Besides being an ill-posed problem, the pel-recursive computation of 2-D optical flow raises a wealth of issues, such as the treatment of outliers, motion discontinuities and occlusion. Our proposed approach deals with these issues within a common framework. It relies on the use of a data-driven technique called Generalized Cross Validation (GCV) to estimate the best regularization scheme for a given moving pixel. In our model, a regularization matrix carries information about different sources of error in its entries and motion vector estimation takes into consideration local image properties following a spatially adaptive. Preliminary experiments indicate that this approach provides robust estimates of the optical flow."
  links:
    "url": "http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.224.9608"
  tags:
  - " spatial adaptation"
  - "data validation"
  - "video processing"
  - " image motion estimation "
  - "meta-model"
  - "regularization"
  - "2D optical flow "
  - "image processing"
  - "Motion estimation"
  - " generalized cross-validation technique "
  - "information models"
  - " occlusion "
  - "Meta-Environment"
  - " regularization matrix "
  - " regularized pel-recursive algorithms "
  - "systematic-approach"
  researchr: "https://researchr.org/publication/citeulike%3A11966066"
  cites: 17
  citedby: 7
  pages: "54-67"
  booktitle: "INTERNATIONAL JOURNAL OF IMAGE PROCESSING (IJIP)"
  kind: "inproceedings"
  key: "citeulike:11966066"
- title: "Error Concealment by Means of Motion Refinement and Regularized Bregman Divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Felipe Pereira do Carmo"
    link: "http://lattes.cnpq.br/2437533314886489"
  - name: "Sandro R. Fernandes"
    link: "https://www.researchgate.net/profile/Sandro_Fernandes"
  year: "2012"
  doi: "http://dx.doi.org/10.1007/978-3-642-32639-4_78"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    doi: "http://dx.doi.org/10.1007/978-3-642-32639-4_78"
    dblp: "http://dblp.uni-trier.de/rec/bibtex/conf/ideal/CoelhoECF12"
    technicalreport: "https://researchr.org/publication/preprint-CoelhoECF12"
  researchr: "https://researchr.org/publication/CoelhoECF12"
  cites: 17
  citedby: 0
  pages: "650-657"
  booktitle: "Intelligent Data Engineering and Automated Learning - IDEAL 2012 - 13th International Conference, Natal, Brazil, August 29-31, 2012. Proceedings"
  editor:
  - name: "Hujun Yin"
    link: "https://researchr.org/alias/hujun-yin"
  - name: "José Alfredo Ferreira Costa"
    link: "https://researchr.org/alias/jos%C3%A9-alfredo-ferreira-costa"
  - name: "Guilherme De A. Barreto"
    link: "https://researchr.org/alias/guilherme-de-a.-barreto"
  volume: "7435"
  series: "Lecture Notes in Computer Science"
  publisher: "Springer"
  isbn: "978-3-642-32638-7"
  kind: "inproceedings"
  key: "CoelhoECF12"
- title: "Application of Genetic Algorithm to Minimize the Number of Objects Processed and Setup in a One-Dimensional Cutting Stock Problem"
  author:
  - name: "Julliany Sales Brandão"
    link: "https://researchr.org/alias/julliany-sales-brand%C3%A3o"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "João Flávio V. Vasconcellos"
    link: "https://researchr.org/alias/jo%C3%A3o-fl%C3%A1vio-v.-vasconcellos"
  - name: "Luiz Leduíno de Salles Neto"
    link: "https://researchr.org/alias/luiz-ledu%C3%ADno-de-salles-neto"
  - name: "André Vieira Pinto"
    link: "https://researchr.org/alias/andr%C3%A9-vieira-pinto"
  year: "2011"
  doi: "http://dx.doi.org/10.4018/jaec.2011010103"
  links:
    doi: "http://dx.doi.org/10.4018/jaec.2011010103"
    dblp: "http://dblp.uni-trier.de/rec/bibtex/journals/ijaec/BrandaoCVNP11"
  researchr: "https://researchr.org/publication/BrandaoCVNP11"
  cites: 0
  citedby: 0
  journal: "IJAEC"
  volume: "2"
  number: "1"
  pages: "34-48"
  kind: "article"
  key: "BrandaoCVNP11"
- title: "Error concealment by means of clustered blockwise PCA"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Joaquim Teixeira de Assis"
    link: "http://lattes.cnpq.br/7307238902576135"
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793789Y3"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  year: "2009"
  doi: "http://dx.doi.org/10.1109/PCS.2009.5167442"
  abstract: "This paper analyzes two variants of Principal Component Analysis (PCA) for error-concealment: blockwise PCA and clustered blockwise PCA. Realistic communication channels are not error free. Since the signals transmitted on real-world channels are highly compressed, regardless of cause, the quality of images reconstructed from any corrupted data can be very unsatisfactory. Error concealment is intended to ameliorate the impact of channel impairments by utilizing a priori information about typical images in conjunction with available picture redundancy to provide subjectively acceptable renditions of affected picture regions. Some experiments have been performed with the two proposed algorithms and they are shown."
  links:
    doi: "http://dx.doi.org/10.1109/PCS.2009.5167442"
  tags:
  - "redundancy"
  - "data-flow"
  - "data-flow analysis"
  researchr: "https://researchr.org/publication/coelho2009error"
  cites: 13
  citedby: 6
  pages: "1-4"
  booktitle: "Picture Coding Symposium, 2009. PCS 2009"
  organization: "IEEE"
  publisher: "IEEE"
  kind: "inproceedings"
  key: "coelho2009error"
- title: "Error concealment by means of motion refinement and regularized bregman divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Felipe Pereira do Carmo"
    link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2012"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    published: "https://researchr.org/publication/citeulike%3A11098377"
  researchr: "https://researchr.org/publication/preprint-citeulike%3A11098377"
  cites: 0
  citedby: 0
  type: "Preprint"
  kind: "techreport"
  key: "preprint-citeulike:11098377"
- title: "Error concealment by means of motion refinement and regularized bregman divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Felipe Pereira do Carmo"
    link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2012"
  doi: "10.1007/978-3-642-32639-4_78"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    technicalreport: "https://researchr.org/publication/preprint-citeulike%3A11098377"
    "url": "http://dx.doi.org/10.1007/978-3-642-32639-4\\_78"
  tags:
  - "empirical"
  - "optical flow"
  - "regularization"
  - "refinement"
  - "monitoring"
  - "clustering"
  - "Inverse problems"
  - "image processing"
  - "Computer vision"
  - "Motion estimation"
  - "surveillance"
  - " motion detection"
  - "Error concealment"
  - "Bregman distance"
  researchr: "https://researchr.org/publication/citeulike%3A11098377"
  cites: 16
  citedby: 4
  pages: "650-657"
  booktitle: "Proceedings of the 13th international conference on Intelligent Data Engineering and Automated Learning"
  volume: "7435"
  series: "IDEAL'12"
  address: "Berlin, Heidelberg"
  publisher: "Springer-Verlag"
  isbn: "978-3-642-32638-7"
  kind: "inproceedings"
  key: "citeulike:11098377"
- title: "State-of-the Art Motion Estimation in the Context of 3D TV"
  author:
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793789Y3"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/57137696/the-prevalence-of-headache-among-elderly-in-a-low-income-area-of-s-o-paulo-brazil"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.jsp?id=K4793789Y3&mostrarNroCitacoesISI=true&mostrarNroCitacoesScopus=true&mostrarNroCitacoesScielo=true"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  year: "2012"
  doi: "10.4018/978-1-4666-2660-7.ch006"
  abstract: "Progress in image sensors and computation power has fueled studies to improve acquisition, processing, and analysis of 3D streams along with 3D scenes/objects reconstruction. The role of motion compensation/motion estimation (MCME) in 3D TV from end-to-end user is investigated in this chapter. Motion vectors (MVs) are closely related to the concept of disparities, and they can help improving dynamic scene acquisition, content creation, 2D to 3D conversion, compression coding, decompression/decoding, scene rendering, error concealment, virtual/augmented reality handling, intelligent content retrieval, and displaying. Although there are different 3D shape extraction methods, this chapter focuses mostly on shape-from-motion (SfM) techniques due to their relevance to 3D TV. SfM extraction can restore 3D shape information from a single camera data."
  links:
  tags:
  - "3D imaging"
  - "Inverse problems"
  - "motion compensation"
  - "image processing"
  - "Computer vision"
  - "Motion estimation"
  - "Error concealment"
  - "3D TV"
  - "multimedia"
  - "video analysis"
  - "stream processing"
  researchr: "https://researchr.org/publication/estrela2012state"
  cites: 109
  citedby: 5
  howpublished: "Paper and online"
  kind: "misc"
  key: "estrela2012state"
- title: "Methodology for Optimization of Polymer Blends Composition"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Gil de Carvalho"
    link: "http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=P84906"
  - name: "Joaquim Teixeira de Assis"
    link: "http://academic.research.microsoft.com/Author/54447924/j-t-de-assis"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  year: "2012"
  doi: "10.5772/2693"
  abstract: "The research of polymer blends, or alloys, has experienced enormous growth in size and sophistication in terms of its scientific base, technology and commercial development (Paul & Bucknall, 2000). As a consequence two very important issues arise: the increased availability of new materials and the need for materials with better performance. Polymer blends are polymer systems originated from the physical mixture of two or more polymers and/or copolymers, without a high degree of chemical reactions between them. To be considered a blend, the compounds should have a concentration above 2% in mass of the second component (Hage & Pessan, 2001; Ihm & White, 1996). However, the commercial viability of new polymers has begun to become increasingly difficult, due to several factors. The advantages of polymer blends lie in the ability to combine existing polymers into new compositions obtaining in this way, materials with specific properties. This strategy allows for savings in research and development of new materials with equivalent properties, as well as versatility, simplicity, relatively low cost (Koning et al., 1998) and faster development time of new materials (Silva, 2011). Rossini (2005) mentions that economically and environmentally, a very viable alternative is to replace the recycling of pure polymers by mixtures of discarded materials. Mechanical recycling causes the breakdown of polymer chains, which impairs the properties of polymers. This degradation is directly proportional to the number of cycles of recycling. Therefore, the blend of two or more discarded polymers can be a realistic alternative, since it can result in materials with very interesting properties, at a low cost. Besides its inexpensiveness, this choice is also a smart solution to the reutilization of garbage. Postconsumption package disposal always occurs in a disorderly manner and without regard for the environment. The recycling process becomes increasingly more important and necessary to remediate environmental impact. According Pang et al. (2000) apud Marconcini & Ruvolo Filho (2006) polyolefins such as high density polyethylene (HDPE), low density polyethylene (LDPE) and polypropylene (PP) and polyesters such as poly (ethylene terephthalate) (PET) are classes of thermoplastics that have been widely used in packaging and constitute a large part of post-consumer waste. The recycling of these materials and their mechanical characterization anticipating the possibility of a new cycle of life in the form of new products is challenging, although technologically and environmentally correct (Marconcini & Ruvolo Filho, 2006). The polymer blends can be obtained basically in two ways (Rossini, 2005):  By dissolving the polymers in a good solvent, common to them, and subsequently letting the solvent evaporate; and  In a mixer where the working temperature is high enough to melt or mollify the polymeric components, without causing degradation of the same. According to Wessler (2007), the polymer blends may be miscible or immiscible. The miscibility is the most important property to be analyzed in a blend, given that all other system properties depend on the number of phases, their morphology and adhesion between them. The miscibility term is directly related to the solubility, i.e., a blend is miscible when the polymers dissolve in each other mutually (Silva, 2011). The immiscible between the various engineering polymers is a limiting factor for its production. Thus, it is necessary to use compatibilization agents for their production. Computational modeling has become increasingly popular. The main objective of models is to assist process optimization with minimal investment of time and resources for experimental work. Most techniques are classified into two main groups: physical models and statistical models as shown by Malinov & Sha (2003). Statistical methods are chosen according to research objectives. There are several multivariate analysis methods for purposes quite different from each other. The desired value and quality of one or more product characteristics can be obtained via experiment analysis and DOE. These methods help determining optimal settings and controllable factors of a process such as: temperature, pressure, amount of reagents, operating time, etc.. When compared to the method of trial and error, DOE also allows a reduction of the number of required tests, and savings in time, labor and money. An important application of DOE is the optimization of experimental formulations as, for example, the composition of mixtures. The formulation development is a fundamental part of the food industry, chemicals, plastics, rubber, paints, medicines, and the like. In materials science, it is important to understand the correlation between material processing, microstructure and properties that enable the optimization of process parameters and compositions of materials to achieve the desired combination of properties, according Malinov & Sha (2003). The problem presented here is to determine the fraction of each polymer blend component, and to determine the agent or, in some cases, an agents system, when it is necessary to use more than one compatibilizing agent. Thus, this text studies the effect of factors, for example, amount of polypropylene, additive type, and amount of additive in the composition of polymer blends, i.e., the optimal polymer blends formulation using factorial design."
  links:
    "url": "http://www.intechopen.com/books/principal-component-analysis-engineering-applications/methodology-for-optimization-of-polymer-blends-composition"
  tags:
  - "control systems"
  - "design science"
  - "rule-based"
  - "Recycling"
  - "operating system"
  - "Environmental Engineering "
  - "composition"
  - "design research"
  - "testing"
  - "type system"
  - "model-driven development"
  - "model-driven engineering"
  - "Engineering Design for Environment"
  - "Meta-Environment"
  - "process modeling"
  - "Sustainability"
  researchr: "https://researchr.org/publication/coelho2012methodology"
  cites: 32
  citedby: 1
  kind: "misc"
  key: "coelho2012methodology"
- title: "Data-Driven Motion Estimation with Spatial Adaptation"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Estrela"
    link: "http://researchr.org/alias/v%C3%A2nia-vieira-estrela"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Vania Vieira Estrela"
    link: "http://www.linkedin.com/profile/view?id=101025443&trk=h-gnav-name-link-0"
  year: "2012"
  abstract: "Besides being an ill-posed problem, the pel-recursive computation of 2-D optical flow raises a wealth of issues, such as the treatment of outliers, motion discontinuities and occlusion. Our proposed approach deals with these issues within a common framework. It relies on the use of a data-driven technique called Generalized Cross Validation (GCV) to estimate the best regularization scheme for a given moving pixel. In our model, a regularization matrix carries information about different sources of error in its entries and motion vector estimation takes into consideration local image properties following a spatially adaptive. Preliminary experiments indicate that this approach provides robust estimates of the optical flow."
  links:
    "url": "http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.224.9608"
  tags:
  - " spatial adaptation"
  - "data validation"
  - "video processing"
  - " image motion estimation "
  - "meta-model"
  - "regularization"
  - "2D optical flow "
  - "image processing"
  - "Motion estimation"
  - " generalized cross-validation technique "
  - "information models"
  - " occlusion "
  - "Meta-Environment"
  - " regularization matrix "
  - " regularized pel-recursive algorithms "
  - "systematic-approach"
  researchr: "https://researchr.org/publication/citeulike%3A11966066"
  cites: 17
  citedby: 7
  pages: "54-67"
  booktitle: "INTERNATIONAL JOURNAL OF IMAGE PROCESSING (IJIP)"
  kind: "inproceedings"
  key: "citeulike:11966066"
- title: "Error concealment by means of motion refinement and regularized bregman divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Felipe Pereira do Carmo"
    link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2012"
  doi: "10.1007/978-3-642-32639-4_78"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    technicalreport: "https://researchr.org/publication/preprint-citeulike%3A11098377"
    "url": "http://dx.doi.org/10.1007/978-3-642-32639-4\\_78"
  tags:
  - "empirical"
  - "optical flow"
  - "regularization"
  - "refinement"
  - "monitoring"
  - "clustering"
  - "Inverse problems"
  - "image processing"
  - "Computer vision"
  - "Motion estimation"
  - "surveillance"
  - " motion detection"
  - "Error concealment"
  - "Bregman distance"
  researchr: "https://researchr.org/publication/citeulike%3A11098377"
  cites: 16
  citedby: 4
  pages: "650-657"
  booktitle: "Proceedings of the 13th international conference on Intelligent Data Engineering and Automated Learning"
  volume: "7435"
  series: "IDEAL'12"
  address: "Berlin, Heidelberg"
  publisher: "Springer-Verlag"
  isbn: "978-3-642-32638-7"
  kind: "inproceedings"
  key: "citeulike:11098377"
- title: "Error Concealment by Means of Motion Refinement and Regularized Bregman Divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Felipe Pereira do Carmo"
    link: "http://lattes.cnpq.br/2437533314886489"
  - name: "Sandro R. Fernandes"
    link: "https://www.researchgate.net/profile/Sandro_Fernandes"
  year: "2012"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    published: "https://researchr.org/publication/CoelhoECF12"
  researchr: "https://researchr.org/publication/preprint-CoelhoECF12"
  cites: 0
  citedby: 0
  type: "Preprint"
  kind: "techreport"
  key: "preprint-CoelhoECF12"
- title: "Error concealment by means of motion refinement and regularized bregman divergence"
  author:
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Author/3361386/vania-v-estrela"
  - name: "Felipe Pereira do Carmo"
    link: "http://academic.research.microsoft.com/Author/49826901/f-p-do-carmo"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "http://academic.research.microsoft.com/Publication/584912/regularized-pel-recursive-motion-estimation-using-generalized-cross-validation-and-spatial"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Sandro Roberto Fernandes"
    link: "http://academic.research.microsoft.com/Author/53603335/sandro-r-fernandes"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Alessandra Martins Coelho"
    link: "http://academic.research.microsoft.com/Author/53930956/alessandra-martins-coelho"
  - name: "Vânia Estrela"
    link: "http://br.linkedin.com/pub/vania-v-estrela/29/9bb/96b/"
  - name: "Vânia Vieira Estrela"
    link: "http://scholar.google.com/citations?hl=en&user=-ZbglqgAAAAJ&view_op=list_works&pagesize=100"
  - name: "Vania Vieira Estrela"
    link: "https://www.researchgate.net/profile/Vania_Estrela?ev=hdr_xprf&_sg=l2it7UJUf2g4wSUGGVaee_gK6wbXK75hN_Rt6P_99NMr2_HObKqAkOwo4ujJMZp7"
  year: "2012"
  doi: "10.1007/978-3-642-32639-4_78"
  abstract: "This work addresses the problem of error concealment in video transmission systems over noisy channels employing Bregman divergences along with regularization. Error concealment intends to improve the effects of disturbances at the reception due to bit-errors or cell loss in packet networks. Bregman regularization gives accurate answers after just some iterations with fast convergence, better accuracy and stability. This technique has an adaptive nature: the regularization functional is updated according to Bregman functions that change from iteration to iteration according to the nature of the neighborhood under study at iteration n. Numerical experiments show that high-quality regularization parameter estimates can be obtained. The convergence is sped up while turning the regularization parameter estimation less empiric, and more automatic."
  links:
    technicalreport: "https://researchr.org/publication/preprint-citeulike%3A11098377"
    "url": "http://dx.doi.org/10.1007/978-3-642-32639-4\\_78"
  tags:
  - "empirical"
  - "optical flow"
  - "regularization"
  - "refinement"
  - "monitoring"
  - "clustering"
  - "Inverse problems"
  - "image processing"
  - "Computer vision"
  - "Motion estimation"
  - "surveillance"
  - " motion detection"
  - "Error concealment"
  - "Bregman distance"
  researchr: "https://researchr.org/publication/citeulike%3A11098377"
  cites: 16
  citedby: 4
  pages: "650-657"
  booktitle: "Proceedings of the 13th international conference on Intelligent Data Engineering and Automated Learning"
  volume: "7435"
  series: "IDEAL'12"
  address: "Berlin, Heidelberg"
  publisher: "Springer-Verlag"
  isbn: "978-3-642-32638-7"
  kind: "inproceedings"
  key: "citeulike:11098377"