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Publisher: SciELO   (Total: 715 journals)

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Showing 601 - 715 of 715 Journals sorted alphabetically
Revista Historia y Sociedad     Open Access  
Revista IBRACON de Estruturas e Materiais     Open Access   (Followers: 1)
Revista Ingenieria de Construcción     Open Access   (Followers: 1, SJR: 0.184, h-index: 2)
Revista Ingenierías Universidad de Medellín     Open Access  
Revista Interamericana de Bibliotecología     Open Access   (Followers: 7)
Revista Internacional de Contaminación Ambiental     Open Access   (SJR: 0.163, h-index: 11)
Revista ION     Open Access  
Revista IUS     Open Access  
Revista Katálysis     Open Access  
Revista Latino-Americana de Enfermagem     Open Access   (SJR: 0.396, h-index: 26)
Revista Latinoamericana de Investigación en Matemática Educativa     Open Access   (SJR: 0.16, h-index: 5)
Revista Latinoamericana de Psicopatologia Fundamental     Open Access   (SJR: 0.223, h-index: 4)
Revista Medica de Chile     Open Access   (SJR: 0.236, h-index: 29)
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: 0.159, h-index: 4)
Revista Mexicana de Astronomía y Astrofísica     Open Access   (SJR: 1.292, h-index: 22)
Revista Mexicana de Biodiversidad     Open Access   (SJR: 0.316, h-index: 13)
Revista Mexicana de Ciencias Agrícolas     Open Access   (Followers: 1)
Revista Mexicana de Ciencias Geológicas     Open Access   (SJR: 0.318, h-index: 26)
Revista Mexicana de Ciencias Pecuarias     Open Access   (Followers: 1, SJR: 0.211, h-index: 4)
Revista Mexicana de Economía y Finanzas     Open Access  
Revista Mexicana de Física     Open Access   (SJR: 0.224, h-index: 18)
Revista mexicana de física E     Open Access  
Revista Mexicana de Fitopatología     Open Access  
Revista Mexicana de Ingeniería Química     Open Access   (SJR: 0.273, h-index: 8)
Revista Mexicana de Investigación Educativa     Open Access   (Followers: 3, SJR: 0.348, h-index: 3)
Revista Mexicana de Micologí­a     Open Access  
Revista Mexicana de Sociologí­a     Open Access   (Followers: 9, SJR: 0.197, h-index: 3)
Revista Musical Chilena     Open Access   (SJR: 0.101, h-index: 2)
Revista MVZ Córdoba     Open Access   (SJR: 0.139, h-index: 6)
Revista Odonto Ciência     Open Access   (SJR: 0.113, h-index: 3)
Revista Opinión Jurídica     Open Access  
Revista Paulista de Pediatria     Open Access  
Revista Perspectivas     Open Access  
Revista Portuguesa de Cirurgia     Open Access   (Followers: 1)
Revista Portuguesa de Imunoalergologia     Open Access   (Followers: 1, SJR: 0.112, h-index: 3)
Revista Portuguesa de Ortopedia e Traumatologia     Open Access  
Revista Portuguesa de Saúde Pública     Open Access   (SJR: 0.117, h-index: 3)
Revista Portuguesa e Brasileira de Gestão     Open Access  
Revista Signos     Open Access   (SJR: 0.155, h-index: 8)
Revista Universitaria de Geografía     Open Access  
Revista Uruguaya de Cardiologia     Open Access  
Revista Veterinaria     Open Access   (SJR: 0.108, h-index: 4)
RGO : Revista Gaúcha de Odontologia     Open Access  
RISTI : Revista Ibérica de Sistemas e Tecnologias de Informação     Open Access   (SJR: 0.203, h-index: 3)
RLA : revista de linguistica teorica y aplicada     Open Access   (Followers: 1, SJR: 0.197, h-index: 6)
Rodriguésia     Open Access   (SJR: 0.317, h-index: 8)
SA Orthopaedic J.     Open Access   (Followers: 2)
Salud Colectiva     Open Access   (SJR: 0.185, h-index: 6)
Salud Mental     Open Access   (Followers: 1, SJR: 0.15, h-index: 19)
Sanidad Militar     Open Access  
São Paulo em Perspectiva     Open Access  
Sao Paulo Medical J.     Open Access   (SJR: 0.237, h-index: 29)
Saúde e Sociedade     Open Access   (SJR: 0.25, h-index: 11)
Saúde em Debate     Open Access  
Sba: Controle & Automação Sociedade Brasileira de Automatica     Open Access  
Scientia Agricola     Open Access   (SJR: 0.418, h-index: 26)
Scientiae Studia     Open Access  
Secuencia     Open Access  
Serviço Social & Sociedade     Open Access   (Followers: 1)
Sexualidad, Salud y Sociedad (Rio de Janeiro)     Open Access   (Followers: 1)
Si Somos Americanos     Open Access  
Signos Filosóficos     Open Access   (SJR: 0.101, h-index: 1)
Silva Lusitana     Open Access  
Sociedad y Religión     Open Access  
Sociedade & Natureza     Open Access  
Sociedade e Estado     Open Access   (Followers: 1, SJR: 0.121, h-index: 5)
Sociologia     Open Access   (SJR: 0.1, h-index: 3)
Sociologias     Open Access   (Followers: 2, SJR: 0.141, h-index: 9)
Sociológica     Open Access   (Followers: 1, SJR: 0.14, h-index: 1)
Soldagem & Inspeção     Open Access   (SJR: 0.356, h-index: 6)
South African Dental J.     Open Access   (SJR: 0.138, h-index: 16)
South African J. of Agricultural Extension     Open Access   (Followers: 4)
South African J. of Animal Science     Open Access   (Followers: 3, SJR: 0.331, h-index: 23)
South African J. of Childhood Education     Open Access   (Followers: 1)
South African J. of Enology and Viticulture     Open Access   (SJR: 0.38, h-index: 13)
South African J. of Industrial Engineering     Open Access   (Followers: 3, SJR: 0.171, h-index: 6)
South African J. of Occupational Therapy     Open Access   (Followers: 25)
South African J. of Surgery     Open Access   (Followers: 1, SJR: 0.201, h-index: 17)
South African Medical J.     Open Access   (Followers: 5, SJR: 0.547, h-index: 45)
Studia Historiae Ecclesiasticae     Open Access   (Followers: 2)
Summa Phytopathologica     Open Access   (SJR: 0.266, h-index: 7)
Tecnología Química     Open Access  
Tecnología y Ciencias del Agua     Open Access   (SJR: 0.169, h-index: 7)
Temas y Debates     Open Access  
Tempo     Open Access   (Followers: 1, SJR: 0.1, h-index: 2)
Tempo Social     Open Access   (Followers: 1, SJR: 0.119, h-index: 4)
Teología y Vida     Open Access   (Followers: 1, SJR: 0.1, h-index: 3)
Terapia Psicológica     Open Access   (SJR: 0.646, h-index: 11)
Texto & Contexto - Enfermagem     Open Access   (SJR: 0.371, h-index: 11)
The European J. of Psychiatry (edicion en español)     Open Access   (Followers: 1)
Tópicos del seminario     Open Access   (Followers: 1)
Toxicodependências     Open Access  
Trabalho, Educação e Saúde     Open Access  
Trabalhos em Linguistica Aplicada     Open Access  
Trans/Form/Ação - Revista de Filosofia     Open Access   (SJR: 0.1, h-index: 2)
Transinformação     Open Access   (Followers: 1, SJR: 0.165, h-index: 2)
Trends in Psychiatry and Psychotherapy     Open Access   (Followers: 9, SJR: 0.225, h-index: 4)
Tydskrif vir Geesteswetenskappe     Open Access   (SJR: 0.239, h-index: 4)
Tydskrif vir Letterkunde     Open Access   (SJR: 0.259, h-index: 3)
Ultima Década     Open Access  
Universitas Philosophica     Open Access  
Universum : Revista de Humanidades y Ciencias Sociales     Open Access   (Followers: 1, SJR: 0.116, h-index: 4)
Vaccimonitor     Open Access   (Followers: 1, SJR: 0.1, h-index: 2)
Varia Historia     Open Access  
Veritas : Revista de Filosofí­a y Teología     Open Access   (Followers: 1)
Veterinaria México     Open Access   (SJR: 0.122, h-index: 7)
Vibrant : Virtual Brazilian Anthropology     Open Access  
Visión de futuro     Open Access  
Water SA     Open Access   (Followers: 1, SJR: 0.381, h-index: 43)
West Indian Medical J.     Open Access   (Followers: 1, SJR: 0.201, h-index: 23)
Yesterday and Today     Open Access   (Followers: 1)
Zoologia (Curitiba)     Open Access   (SJR: 0.464, h-index: 20)

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Journal Cover Pesquisa Operacional
  [SJR: 0.284]   [H-I: 11]   [0 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0101-7438
   Published by SciELO Homepage  [715 journals]

    • Abstract: ABSTRACT The supply chains which bring biomass to biorefineries play a critical role in biofuel production. Optimization models can help decision makers to design more efficient chains and minimize the cost of biomass delivered to the refineries. This article based on a French national research project on biomass logistics considers one refinery, able to process several crops and several parts of the same crop, over a one-year horizon divided into days or weeks. A network model and a data model are first developed to let the decision maker describe the supply chain structure and its data, without affecting the underlying mathematical model. The latter is a mixed integer linear program which combines for the first time various features, either original or tackled separately in the literature. Knowing the refinery demands, it determines the activity levels in the network (amounts harvested, baled, transported, stored, etc.) and the required equipment, in order to minimize a total cost including harvesting costs, transport costs and storage costs. Numerical evaluations based on real data show that the proposed model can optimize large supply chains in reasonable running times.

    • Abstract: ABSTRACT In this paper, we propose a new methodology for variable selection in Data Envelopment Analysis (DEA). The methodology is based on an internal measure which evaluates the contribution of each variable in the calculation of the efficiency scores of DMUs. In order to apply the proposed method, an algorithm, known as “ADEA”, was developed and implemented in R. Step by step, the algorithm maximizes the load of the variable (input or output) which contribute least to the calculation of the efficiency scores, redistributing the weights of the variables without altering the efficiency scores of the DMUs. Once the weights have been redistributed, if the lower contribution does not reach a previously given critical value, a variable with minimum contribution will be removed from the model and, as a result, the DEA will be solved again. The algorithm will stop when all variables reach a given contribution load to the DEA or until no more variables can be removed. In this way and contrary to what is usual, the algorithm provides a clear stop rule. In both cases, the efficiencies obtained from the DEA will be considered suitable and rightly interpreted in terms of the remaining variables, indicating the load themselves; moreover, the algorithm will provide a sequence of alternative nested models - potential solutions - that could be evaluated according to external criterion. To illustrate the procedure, we have applied the methodology proposed to obtain a research ranking of Spanish public universities. In this case, at each step of the algorithm, the critical value is obtained based on a simulation study.

    • Abstract: ABSTRACT In this paper, we provide an empirical discussion of the differences among some scenario tree-generation approaches for stochastic programming. We consider the classical Monte Carlo sampling and Moment matching methods. Moreover, we test the Resampled average approximation, which is an adaptation of Monte Carlo sampling and Monte Carlo with naive allocation strategy as the benchmark. We test the empirical effects of each approach on the stability of the problem objective function and initial portfolio allocation, using a multistage stochastic chance-constrained asset-liability management (ALM) model as the application. The Moment matching and Resampled average approximation are more stable than the other two strategies.

    • Abstract: ABSTRACT This paper presents a case study of table reservation practice for restaurant business within Walt Disney World. A unique feature here is to consider table combination to capture revenue potentials from different party sizes and at different time periods. For example, a party of large size can be served by combining two or more small tables. A mixed integer programming (MIP) model is developed to make the reservation recommendation. We propose a rolling horizon reservation policy such that the value of a particular table is periodically evaluated and updated. This is a typical revenue management method in the airlines and other industries, the essence of which is to compare the future expected revenue with a currently offered price. Using historical data, numerical test shows a significant revenue improvement potential from our proposed model.

    • Abstract: ABSTRACT This study puts forward a multi-attribute decision model that determines good production and inventory parameter settings in make-to-stock (MTS) environments controlled by the Conwip (constant work-in-process) method. This model uses a discrete event simulation to evaluate the performance of a system in relation to work-in-process and a finished goods inventory. Based on Multi-Attribute Value Theory (MAVT), a compromise solution is found by taking into account the decision-maker’s preferences and tradeoff judgments as to the attributes of cycle time, throughput rate, holding cost and stockout cost. A numerical application is given to illustrate the use of the proposed multi-attribute model which includes a sensitivity analysis.

    • Abstract: ABSTRACT The Composition of Probabilistic Preferences is here applied to combine eight indicators of human development. The four components of HDI are considered together with indices of inequality in longevity, schooling, and income, and the UNDP Gender Development Index. To compose the probabilities of preference by the different criteria, a pessimistic and conservative point of view is taken. This point of view, while generating the global score, results in employing for each option the probability of not presenting the lowest evaluation according to any criterion, increasing the importance assigned in the computations to the proximity to the frontier of worst performances. Alternative rankings of the 188 countries ranked in the 2015 and the 2016 Human Development Report are obtained. Capacities allowing for interactions between up to eight components are employed. Representative profiles of ordered classes are derived from the rankings. Classifications of the countries into previously determined classes are also performed.

    • Abstract: ABSTRACT This study analyzed the productive strategies and technology of beef producers in the Vermelho basin in Goiás, Brazil. The data were used to develop a technological index, applicable to the local beef production systems. The data were obtained using questionnaires. A set of 60 properties was selected to provide a representative sample of the relief and soil quality within the study area. The data were analyzed using multiple correspondence, cluster analysis, and beta regression procedures. The variables that most contributed to the definition of the technological level were identified. The variables and production units each formed three clusters, corresponding to three levels of technology: low, mid, and high. The data were used to calculate a predictive index for the analysis and mapping of the technology used in the study area. High cattle densities were found in systems with low technology, indicating low productivity and profitability, and reduced environmental sustainability.

    • Abstract: ABSTRACT In this paper we optimize the preparation time of a tubes machine. Tubes are hard tubes made by gluing strips of paper that are packed in paper reels, and some of them may be reused between the production of one and another tube. We present a mathematical model for the minimization of changing reels and movements and also implementations for the heuristics Nearest Neighbor, an improvement of a nearest neighbor (Best Nearest Neighbor), refinements of the Best Nearest Neighbor heuristic and a heuristic of permutation called Best Configuration using the IDE (integrated development environment) WxDev C++. The results obtained by simulations improve the one used by the company.

    • Abstract: ABSTRACT We propose the use of multicriteria decision analysis for the valuation of Brazilian banks. In order to model uncertainties, we combine the use of multicriteria decision analysis with fuzzy mathematics. We specifically modify the method Tomada de Decisão Interativa Multicritério (TODIM) to incorporate fuzzy numbers, resulting in a methodology we call TODIM Fuzzy. A six-year data set of audited financial statements is considered to illustrate the use of the methodology when analyzing the six largest (net worth) banks operating in Brazil. Several sensitivity analyses are conducted to illustrate how small changes in the inputs can alter the results obtained with the original TODIM and the TODIM Fuzzy. The numerical illustrations have displayed consistent and robust results when the scores of the six banks are computed and the institutions are compared among themselves.
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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