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Publisher: SciELO   (Total: 694 journals)

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Latin American Journal of Solids and Structures     Open Access  
Latinoamérica. Revista de estudios Latinoamericanos     Open Access   (2 followers)
Lecturas de Economía     Open Access  
Linguagem em (Dis)curso     Open Access  
Literatura y Lingüística     Open Access  
Lua Nova: Revista de Cultura e Política     Open Access  
Luna Azul     Open Access  
Maderas. Ciencia y tecnología     Open Access  
Magallania     Open Access  
Mana - Estudos de Antropologia Social     Open Access   (2 followers)
Mastozoología Neotropical     Open Access  
Matéria (Rio de Janeiro)     Open Access   (1 follower)
Materials Research     Open Access   (5 followers)
MEDICC Review     Open Access  
Medicina Legal de Costa Rica     Open Access   (2 followers)
Medicina Oral, patología oral y cirugía bucal     Open Access  
Medicina y Seguridad del Trabajo     Open Access   (1 follower)
MEDISAN     Open Access  
MediSur     Open Access  
Memoria Americana     Open Access  
Memoria y Sociedad     Open Access  
Memórias do Instituto Oswaldo Cruz     Open Access  
Meteorologica     Open Access  
Migración y Desarrollo     Open Access  
Migraciones Internacionales     Open Access  
Motriz: Revista de Educação Física     Open Access  
Multequina     Open Access  
Mundo Agrario     Open Access  
Nefrología (Madrid)     Open Access  
Neotropical Ichthyology     Open Access  
Neurocirugia     Open Access  
Nómadas     Open Access  
Norteamérica     Open Access   (2 followers)
Nova Economia     Open Access   (1 follower)
Nova Tellus     Open Access  
Novos Estudos - CEBRAP     Open Access  
Nucleus     Open Access  
Nutrición Hospitalaria     Open Access  
Obras y Proyectos     Open Access  
Odontoestomatología     Open Access   (1 follower)
Oncología (Barcelona)     Open Access  
Opinião Pública     Open Access  
ORINOQUIA     Open Access  
Paidéia (Ribeirão Preto)     Open Access  
Palabra Clave     Open Access   (1 follower)
Pandaemonium Germanicum     Open Access  
Papéis Avulsos de Zoologia     Open Access   (1 follower)
Papeles de Población     Open Access  
Parasitología al día     Open Access   (1 follower)
Parasitologia latinoamericana     Open Access   (1 follower)
Pastos y Forrajes     Open Access  
Pediatría Atención Primaria     Open Access  
Pensamiento & Gestión     Open Access  
Per Musi     Open Access  
Perfil de Coyuntura Económica     Open Access  
Perfiles ducativos     Open Access  
Perfiles Latinoamericanos     Open Access  
Perspectivas em Ciência da Informação     Open Access   (5 followers)
Pesquisa Agropecuária Brasileira     Open Access   (1 follower)
Pesquisa Odontológica Brasileira     Open Access  
Pesquisa Operacional     Open Access  
Pesquisa Veterinária Brasileira     Open Access  
Pharmacy Practice (Internet)     Open Access   (2 followers)
Physis: Revista de Saúde Coletiva     Open Access  
Phyton (Buenos Aires)     Open Access   (1 follower)
Planta Daninha     Open Access   (1 follower)
Población y Sociedad     Open Access  
Polibotánica     Open Access   (1 follower)
Polímeros: Ciência e Tecnologia     Open Access  
Política Criminal     Open Access  
Política y Cultura     Open Access  
Política y Gobierno     Open Access  
Prismas     Open Access  
Pró-Fono Revista de Atualização Científica     Open Access  
Pro-Posições     Open Access  
Produção     Open Access  
Prohistoria     Open Access  
Proyecciones : Revista de matematica     Open Access   (1 follower)
Psic : Revista de Psicologia da Vetor Editora     Open Access  
Psico-USF     Open Access  
Psicologia & Sociedade     Open Access  
Psicologia : Ciência e Profissão     Open Access  
Psicologia Clínica     Open Access  
Psicología desde el Caribe     Open Access  
Psicologia em Estudo     Open Access  
Psicologia Escolar e Educacional     Open Access  
Psicologia USP     Open Access  
Psicologia: Reflexão e Crítica     Open Access  
Psicologia: Teoria e Pesquisa     Open Access  
Psychology & Neuroscience     Open Access   (3 followers)
Psychology in Society     Open Access  
Psykhe (Santiago)     Open Access  
Química Nova     Open Access   (1 follower)
Quinto Sol     Open Access  
Radiologia Brasileira     Open Access   (2 followers)
RAE-eletrônica     Open Access   (1 follower)
RAM. Revista de Administração Mackenzie     Open Access   (1 follower)
RCOE     Open Access  
REAd : Revista eletrônica de administração     Open Access  
Región y Sociedad     Open Access   (1 follower)

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Pesquisa Operacional    Journal TOC RSS feeds Export to Zotero Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 0101-7438
     Published by SciELO Homepage  [694 journals]
  • Clustering search
    • Abstract: This paper presents the Clustering Search (CS) as a new hybrid metaheuristic, which works in conjunction with other metaheuristics, managing the implementation of local search algorithms for optimization problems. Usually the local search is costly and should be used only in promising regions of the search space. The CS assists in the discovery of these regions by dividing the search space into clusters. The CS and its applications are reviewed and a case study for a problem of capacitated clustering is presented.
       
  • Some results about the connectivity of trees
    • Abstract: The second smallest Laplacian eigenvalue of a graph G is called algebraic connectivity, denoted a(G). The ordering of trees via this graph invariant is frequently studied in the literature. In this paper, we present a new invariant, the Internal Degree Sequence (IDS), that also supports an accurate evaluation of the connectivity of trees. We compare the IDS with a(G) for all elements in six classes of trees known to have the largest algebraic connectivity and we show that the IDS provides a strict total ordering of the elements of these classes. This result is also proved for a subclass of trees of diameter 4.
       
  • A review of three decades of research on some combinatorial optimization problems
    • Abstract: This paper presents an overview of our research in combinatorial optimization problems. Over the last three decades, our team has been studying mostly optimization problems that arise in industrial environments through the elaboration and solution of mathematical decision models. In addition to elaborating innovative models, we have improved upon existing solutions to complex problems, helping decision makers and researchers to better understand complex industrial systems. Our work has focused on the development of computationally more efficient algorithms that improve on existing methods by improving the solution quality or reducing the computation effort to obtain good solutions. While some of our earlier work became less necessary with the speed up of the computational facilities, the search for improved solution quality and reduced computational effort continues. After reviewing our findings on lot sizing, production scheduling, cutting problems, pattern sequencing, tool switches in flexible manufacturing machines and integrated cutting and sequencing problems, we propose topics for future study.
       
  • Pesquisa operacional: a celebration to Mark Horacio Hideki Yanasse's 60th birthday
    •  
  • Design to learn: customizing services when the future matters
    • Abstract: Internet-based customization tools can be used to design service encounters that maximize customers' utility in the present or explore their tastes to provide more value in the future, where these two goals conflict with each other. Maximizing expected customer satisfaction in the present leads to slow rates of learning that may limit the ability to provide quality in the future. An emphasis on learning can lead to unsatisfied customers that will not only forego purchasing in the current period, but, more seriously, never return if they lose trust in the service provider's ability to meet their needs. This paper describes service design policies that balance the objectives of learning and selling by characterizing customer lifetime value as a function of knowledge. The analysis of the customization problem as a dynamic program yields three results. The first result is the characterization of customization policies that quantify the value of knowledge so as to adequately balance the expected revenue of present and future interactions. The second result is an analysis of the impact of operational decisions on loyalty, learning, and profitability over time. Finally, the quantification of the value of knowing the customer provides a connection between customer acquisition and retention policies, thus enhancing the current understanding of the mechanisms connecting service customization, value creation, and customer lifetime value.
       
  • Ten years of research on parametric data envelopment analysis
    • Abstract: In this paper we present a brief overview of 10 years of research on Parametric Data Envelopment Analysis (DEA). We begin with a brief introduction to DEA. Then, we present the central problem of how to distribute a new and total fixed variable (input or output) across all DMUs (Decision Making Units) present in the analysis. We then tell the history of the developments in Parametric DEA, beginning with its first conception in 2002, moving onward to the current research. We conclude with a brief discussion of future perspectives.
       
  • Using value-focused thinking in Brazil
    • Abstract: Value-Focused Thinking (VFT) provides a systematic approach to structure complex decisions for subsequent analysis. It is a powerful complement to decision analysis and its application has been growing in recent years. This paper discusses the application of VFT in Brazil to three problems in different contexts: water management, information system/information technology (IS/IT) strategic planning, and the disposal of plaster waste. This article describes how the VFT approach was used to structure these decision problems and identify alternatives to stall them, which led to developing qualitative and quantitative models for evaluating the alternatives, and discusses how such structures can be used in other similar problems.
       
  • A non-standard optimal control problem arising in an economics application
    • Abstract: A recent optimal control problem in the area of economics has mathematical properties that do not fall into the standard optimal control problem formulation. In our problem the state value at the final time the state, y(T) = z, is free and unknown, and additionally the Lagrangian integrand in the functional is a piecewise constant function of the unknown value y(T). This is not a standard optimal control problem and cannot be solved using Pontryagin's Minimum Principle with the standard boundary conditions at the final time. In the standard problem a free final state y(T) yields a necessary boundary condition p(T) = 0, where p(t) is the costate. Because the integrand is a function of y(T), the new necessary condition is that y(T) should be equal to a certain integral that is a continuous function of y(T). We introduce a continuous approximation of the piecewise constant integrand function by using a hyperbolic tangent approach and solve an example using a C++ shooting algorithm with Newton iteration for solving the Two Point Boundary Value Problem (TPBVP). The minimising free value y(T) is calculated in an outer loop iteration using the Golden Section or Brent algorithm. Comparative nonlinear programming (NP) discrete-time results are also presented.
       
 
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