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Publisher: SciELO   (Total: 727 journals)

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Showing 601 - 727 of 727 Journals sorted alphabetically
Revista Facultad Nacional de Salud Pública     Open Access  
Revista Gaúcha de Enfermagem     Open Access   (SJR: 0.266, h-index: 7)
Revista Geológica de América Central     Open Access  
Revista Geológica de Chile     Open Access   (Followers: 1)
Revista Gerencia y Políticas de Salud     Open Access   (SJR: 0.186, h-index: 1)
Revista Habanera de Ciencias Médicas     Open Access  
Revista Historia y Sociedad     Open Access  
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Revista Ingenieria de Construcción     Open Access   (SJR: 0.112, h-index: 1)
Revista Ingenierías Universidad de Medellín     Open Access  
Revista Interamericana de Bibliotecología     Open Access   (Followers: 9)
Revista Internacional de Contaminación Ambiental     Open Access   (SJR: 0.158, h-index: 9)
Revista ION     Open Access  
Revista IUS     Open Access  
Revista Katálysis     Open Access  
Revista Latino-Americana de Enfermagem     Open Access   (SJR: 0.633, h-index: 23)
Revista Latinoamericana de Bioética     Open Access  
Revista Latinoamericana de Investigación en Matemática Educativa     Open Access   (SJR: 0.125, h-index: 4)
Revista Latinoamericana de Psicopatologia Fundamental     Open Access   (SJR: 0.194, h-index: 3)
Revista Medica de Chile     Open Access   (SJR: 0.197, h-index: 25)
Revista Médica del Hospital Nacional de Niños Dr. Carlos Sáenz Herrera     Open Access   (Followers: 1)
Revista Médica Electrónica     Open Access  
Revista Médica La Paz     Open Access  
Revista Mexicana de Análisis de la Conducta     Open Access   (SJR: 0.139, h-index: 2)
Revista Mexicana de Astronomía y Astrofísica     Open Access   (SJR: 0.575, h-index: 19)
Revista Mexicana de Biodiversidad     Open Access   (SJR: 0.29, h-index: 10)
Revista Mexicana de Ciencias Agrícolas     Open Access   (Followers: 1)
Revista Mexicana de Ciencias Geológicas     Open Access   (SJR: 0.462, h-index: 22)
Revista Mexicana de Ciencias Pecuarias     Open Access   (SJR: 0.143, h-index: 2)
Revista Mexicana de Economía y Finanzas     Open Access  
Revista Mexicana de Física     Open Access  
Revista mexicana de física E     Open Access   (SJR: 0.242, h-index: 16)
Revista Mexicana de Fitopatología     Open Access  
Revista Mexicana de Ingeniería Química     Open Access   (SJR: 0.297, h-index: 6)
Revista Mexicana de Investigación Educativa     Open Access   (Followers: 3, SJR: 0.101, h-index: 1)
Revista Mexicana de Micologí­a     Open Access  
Revista Mexicana de Sociologí­a     Open Access   (Followers: 10, SJR: 0.131, h-index: 1)
Revista Musical Chilena     Open Access   (SJR: 0.101, h-index: 1)
Revista MVZ Córdoba     Open Access   (SJR: 0.19, h-index: 4)
Revista Odonto Ciência     Open Access   (SJR: 0.11, h-index: 2)
Revista Opinión Jurídica     Open Access  
Revista Panamericana de Salud Pública     Open Access  
Revista Paulista de Pediatria     Open Access   (SJR: 0.236, h-index: 4)
Revista Peruana de Ginecología y Obstetricia     Open Access  
Revista Peruana de Medicina Experimental y Salud Pública     Open Access   (SJR: 0.248, h-index: 7)
Revista Portuguesa de Cirurgia     Open Access  
Revista Portuguesa de Enfermagem de Saúde Mental     Open Access  
Revista Portuguesa de Imunoalergologia     Open Access   (Followers: 1)
Revista Portuguesa de Ortopedia e Traumatologia     Open Access  
Revista Portuguesa de Saúde Pública     Open Access  
Revista Portuguesa e Brasileira de Gestão     Open Access  
Revista Signos     Open Access   (SJR: 0.161, h-index: 6)
Revista U.D.C.A Actualidad & Divulgación Científica     Open Access   (Followers: 1)
Revista Universitaria de Geografía     Open Access  
Revista Uruguaya de Cardiologia     Open Access  
Revista Veterinaria     Open Access  
RGO : Revista Gaúcha de Odontologia     Open Access  
RISTI : Revista Ibérica de Sistemas e Tecnologias de Informação     Open Access  
RLA : revista de linguistica teorica y aplicada     Open Access   (Followers: 2, SJR: 0.162, h-index: 3)
Rodriguésia     Open Access   (SJR: 0.325, h-index: 4)
SA Orthopaedic J.     Open Access   (Followers: 2)
Salud Colectiva     Open Access   (SJR: 0.221, h-index: 4)
Salud Mental     Open Access   (Followers: 1, SJR: 0.171, h-index: 18)
Salud Publica de Mexico     Open Access   (SJR: 0.491, h-index: 33)
Sanidad Militar     Open Access  
São Paulo em Perspectiva     Open Access  
Sao Paulo Medical J.     Open Access   (SJR: 0.27, h-index: 25)
Sapiens. Revista Universitaria de Investigacion     Open Access  
Saúde e Sociedade     Open Access   (SJR: 0.367, h-index: 7)
Saúde em Debate     Open Access  
Sba: Controle & Automação Sociedade Brasileira de Automatica     Open Access  
Scientia Agricola     Open Access   (Followers: 1, SJR: 0.64, h-index: 20)
Scientiae Studia     Open Access  
Secuencia     Open Access  
Serviço Social & Sociedade     Open Access   (Followers: 1)
Sexualidad, Salud y Sociedad (Rio de Janeiro)     Open Access  
Si Somos Americanos     Open Access  
Signos Filosóficos     Open Access   (SJR: 0.102, h-index: 0)
Silva Lusitana     Open Access  
Sociedad y Religión     Open Access  
Sociedade & Natureza     Open Access  
Sociedade e Estado     Open Access   (Followers: 1, SJR: 0.146, h-index: 4)
Sociologia     Open Access  
Sociologias     Open Access   (Followers: 3, SJR: 0.228, h-index: 7)
Sociológica     Open Access   (Followers: 2)
Soldagem & Inspeção     Open Access   (SJR: 0.165, h-index: 4)
South African Dental J.     Open Access   (SJR: 0.133, h-index: 14)
South African J. of Agricultural Extension     Open Access   (Followers: 3)
South African J. of Animal Science     Open Access   (Followers: 4, SJR: 0.293, h-index: 19)
South African J. of Enology and Viticulture     Open Access  
South African J. of Industrial Engineering     Open Access   (Followers: 2, SJR: 0.144, h-index: 5)
South African J. of Occupational Therapy     Open Access   (Followers: 7)
South African J. of Surgery     Open Access   (Followers: 1, SJR: 0.26, h-index: 16)
South African Medical J.     Open Access   (Followers: 5)
Studia Historiae Ecclesiasticae     Open Access   (Followers: 2)
Summa Phytopathologica     Open Access   (SJR: 0.326, h-index: 5)
Tecnología y Ciencias del Agua     Open Access  
Temas y Debates     Open Access  
Tempo     Open Access   (Followers: 2, SJR: 0.101, h-index: 1)
Tempo Social     Open Access   (Followers: 1, SJR: 0.133, h-index: 3)
Teología y Vida     Open Access   (Followers: 1, SJR: 0.1, h-index: 3)
Terapia Psicológica     Open Access   (SJR: 0.32, h-index: 7)
Texto & Contexto - Enfermagem     Open Access   (SJR: 0.358, h-index: 8)
The European J. of Psychiatry (edicion en español)     Open Access   (Followers: 1)
Tópicos     Open Access   (SJR: 0.101, h-index: 1)
Tópicos del seminario     Open Access   (Followers: 1)
Toxicodependências     Open Access  
Trabalho, Educação e Saúde     Open Access  
Trabalhos em Linguistica Aplicada     Open Access   (Followers: 1)
Trans/Form/Ação - Revista de Filosofia     Open Access   (Followers: 1)
Transinformação     Open Access   (SJR: 0.114, h-index: 1)
Trends in Psychiatry and Psychotherapy     Open Access   (Followers: 8, SJR: 0.118, h-index: 2)
Tydskrif vir Geesteswetenskappe     Open Access   (SJR: 0.188, h-index: 3)
Tydskrif vir Letterkunde     Open Access   (SJR: 0.116, h-index: 2)
Ultima Década     Open Access  
Universitas Philosophica     Open Access  
Universum : Revista de Humanidades y Ciencias Sociales     Open Access   (Followers: 1, SJR: 0.111, h-index: 3)
Vaccimonitor     Open Access   (Followers: 1, SJR: 0.101, h-index: 1)
Varia Historia     Open Access   (Followers: 2)
Veritas : Revista de Filosofí­a y Teología     Open Access   (Followers: 2)
Veterinaria México     Open Access   (SJR: 0.211, h-index: 5)
Vibrant : Virtual Brazilian Anthropology     Open Access  
Visión de futuro     Open Access  
Water SA     Open Access   (SJR: 0.409, h-index: 38)
West Indian Medical J.     Open Access   (Followers: 1, SJR: 0.158, h-index: 20)
Yesterday and Today     Open Access   (Followers: 2)
Zoologia (Curitiba)     Open Access   (Followers: 1, SJR: 0.476, h-index: 16)

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Journal Cover Pesquisa Operacional
  [SJR: 0.292]   [H-I: 8]   [0 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0101-7438
   Published by SciELO Homepage  [727 journals]

    • Abstract: ABSTRACT The Traveling Salesman Problem (TSP) is one of the most well-known and studied problems of Operations Research field, more specifically, in the Combinatorial Optimization field. As the TSP is a NP (Non-Deterministic Polynomial time)-hard problem, there are several heuristic methods which have been proposed for the past decades in the attempt to solve it the best possible way. The aim of this work is to introduce and to evaluate the performance of some approaches for achieving optimal solution considering some symmetrical and asymmetrical TSP instances, which were taken from the Traveling Salesman Problem Library (TSPLIB). The analyzed approaches were divided into three methods: (i) Lin-Kernighan-Helsgaun (LKH) algorithm; (ii) LKH with initial tour based on uniform distribution; and (iii) an hybrid proposal combining Particle Swarm Optimization (PSO) with quantum inspired behavior and LKH for local search procedure. The tested algorithms presented promising results in terms of computational cost and solution quality.

    • Abstract: ABSTRACT Contributions from the sensitivity analysis of the parameters of the linear programming model for the elicitation of experts' beliefs are presented. The process allows for the calibration of the family of probability distributions obtained in the elicitation process. An experiment to obtain the probability distribution of a future event (Brazil vs. Spain soccer game in the 2013 FIFA Confederations Cup final game) was conducted. The proposed sensitivity analysis step may help to reduce the vagueness of the information given by the expert.

    • Abstract: ABSTRACT Brazil's location and tropical weather conditions are favourable cultivating sugarcane, which has led to Brazil being one of the world's largest producers of sugarcane. The influence of the sugarcane industry on its economy stands out among the indicators of Brazilian economic growth and because the diversified investment when planning the production of products derived from this sector is encouraged. The decision on which derivative (for example, crystal sugar, anhydrous ethanol, or hydrous ethanol) to produce from raw sugarcane can be modelled as an investment decision in a portfolio decision problem whenever a combination of these products is considered. As to the future price of these commodities, raw sugarcane is considered to be capital that should be invested. Thus, this paper puts forward a decision model which uses concepts from Decision Analysis and Bayesian Risk Analysis that may well assist the process of managing assets in the Brazilian sugarcane industry by considering the financial aspect when compiling a portfolio for planning production.

    • Abstract: ABSTRACT In this paper we study a particular aspect of the urban community policing: routine patrol route planning. We seek routes that guarantee visibility, as this has a sizable impact on the community perceived safety, allowing quick emergency responses and providing surveillance of selected sites (e.g., hospitals, schools). The planning is restricted to the availability of vehicles and strives to achieve balanced routes. We study an adaptation of the model for the multi-vehicle covering tour problem, in which a set of locations must be visited, whereas another subset must be close enough to the planned routes. It constitutes an NP-complete integer programming problem. Suboptimal solutions are obtained with several heuristics, some adapted from the literature and others developed by us. We solve some adapted instances from TSPLIB and an instance with real data, the former being compared with results from literature, and latter being compared with empirical data.

    • Abstract: ABSTRACT In this paper, we propose a distribution that describes a specific system. The system has a heavy traffic, a fast service and the service rate depends on state of the system. This distribution we call the Maximum-Conway-Maxwell-Poisson-exponential distribution, denoted by MAXCOMPE distribution. The MAXCOMPE distribution is obtained by compound distributions in which we use the zero truncated Conway-Maxwell-Poisson distribution and the exponential distribution. This distribution has adjustment mechanism in order to re-establish the equilibrium of the system when the traffic flow increases and that is described by variations of the pressure parameter. Because of this, the MAXCOMPE distribution contains sub-models, such as, the Maximum-geometric-exponential distribution, the Maximum-Poisson-exponential distribution and the Maximum-Bernoulli-exponential distribution. The properties of the proposed distribution are discussed, including formal proof of its density function and explicit algebraic formulas for their reliability function and moments. The parameter estimation is based on the usual maximum likelihood method. Simulated and real data are shown to illustrate the applicability of the model.

    • Abstract: ABSTRACT In this paper we propose a simulation-based method for predicting the 2010 and 2014Football World Cup. Adopting a bayesian perspective, we modeled the number of goals of two opposing teams as a Poisson distribution whose mean is proportional to the relative technical level of opponents. FIFA ratings were taken as the measure of technical level of teams and experts' opinions about scores of matches were taken to construct prior distribution of parameters. Just before each round, tournament simulations were performed in order to estimate probabilities of events of main interest for audience and bettors such as qualifying to the knockout stage, reaching semi-finals, reaching the final match, winningthe tournament, among others.

    • Abstract: ABSTRACT In this work we propose a multicriteria evaluation scheme for heuristic algorithms based on the classic Condorcet ranking technique. Weights are associated to the ranking of an algorithm among a set being object of comparison. We used five criteria and a function on the set of natural numbers to create a ranking. The discussed comparison involves three well-known problems of combinatorial optimization - Traveling Salesperson Problem (TSP), Capacitated Vehicle Routing Problem (CVRP) and Quadratic Assignment Problem (QAP). The tested instances came from public libraries. Each algorithm was used with essentially the same structure, the same local search was applied and the initial solutions were similarly built. It is important to note that the work does not make proposals involving algorithms: the results for the three problems are shown only to illustrate the operation of the evaluation technique. Four metaheuristics - GRASP, Tabu Search, ILS and VNS - are therefore only used for the comparisons.

    • Abstract: ABSTRACT This paper addresses the cutting stock/leftover problem (CSLP), which differs from the ordinary cutting stock problem (CSP) by retaining stock leftovers that can be cut in the future to meet new demands. Therefore, leftovers are not considered waste in the current period. A new mathematical model for the CSLP is presented to capture a well-used strategy in the practice of cutting, which consists of partially cutting the objects in stock, and keeping the leftovers to be cut in the next periods. Computational experiments were made for the one-dimensional case, although other dimensions can be considered straightforward.

    • Abstract: ABSTRACT An important problem in Multi-Criteria Decision Analysis arises when one must select at least two alternatives at the same time. This can be denoted as a multiple choice problem. In other words, instead of evaluating each of the alternatives separately, they must be combined into groups of n alternatives, where n = 2. When the multiple choice problem must be solved under multiple criteria, the result is a multi-criteria, multiple choice problem. In this paper, it is shown through examples how this problemcan be tackled on a bipolar scale. The Choquet integral is used in this paper to take care of interactions between criteria. A numerical application example is conducted using data from SEBRAE-RJ, a non-profit private organization that has the mission of promoting competitiveness, sustainable developmentand entrepreneurship in the state of Rio de Janeiro, Brazil. The paper closes with suggestions for future research.

    • Abstract: ABSTRACT Lot sizing and scheduling by mixed integer programming has been a hot research topic in the last 20 years. Researchers have been trying to develop stronger formulations, as well as to incorporate real-world requirements from different applications. This paper illustrates some of these requirements and demonstrates how small- and big-bucket models have been adapted and extended. Motivation comes from different industries, especially from process and fast-moving consumer goods industries.
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327
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