Brazilian Congress structural balance analysis

In this work, we study the behavior of Brazilian politicians and political parties with the help of clustering algorithms for signed social networks. For this purpose, we extract and analyze a collection of signed networks representing voting sessions of the lower house of Brazilian National Congress. We process all available voting data for the period between 2011 and 2016, by considering voting similarities between members of the Congress to define weighted signed links. The solutions obtained by solving Correlation Clustering (CC) problems are the basis for investigating deputies voting networks as well as questions about loyalty, leadership, coalitions, political crisis, and social phenomena such as mediation and polarization.Comment: 27 pages, 15 tables, 6 figures; entire article was revised, new references added (including international press); correcting typing error

Length-weight relationships of marine fishes from the central Brazilian coast

Parameters of the length-weight relationship are presented for 85 fish species from the marine and estuarine regions of the central Brazilian coast (latitude 13° to 23° S). Three different methods were used. A non-linear iterative process using the quasi-Newton algorithm yielded a better fit for all data sets analyzed. The length-weight allometry coefficient b estimated from standard length data tended to be lower than from total length data. The difference between these estimates was significant for some species

Length-weight relationships of marine fishes from the central Brazilian coast

Parameters of the length-weight relationship are presented for 85 fish species from the marine and estuarine regions of the central Brazilian coast (latitude 13° to 23° S). Three different methods were used. A non-linear iterative process using the quasi-Newton algorithm yielded a better fit for all data sets analyzed. The length-weight allometry coefficient b estimated from standard length data tended to be lower than from total length data. The difference between these estimates was significant for some species.Length-weight relationships, Marine fish, Stock assessment, Brazil,

Post legal positivism: new paradigm of legal science (jurisprudence) and practice in Brazil

The relation between law, moral, society and science is shifting in Brazil as it is changing in democratic contemporary societies. This paper proposes to reflect about this change in the Brazilian legal and social context. Jurisprudence and legal practice have been transformed intensively after the Brazilian redemocratization that began in 1985 and Federal Constitution of 1988. In the field of Jurisprudence (Legal Theory), a new legal theory called post-positivism progressively has been overcoming legal critical studies and legal positivism. In recent years, ideas as any moral values can be improved by law (positivism) or law is one of many oppressive institutions in capitalist society (legal critical studies – Marxism) have been losing place in legal theory. Nowadays, when Brazilian Constitution implements just society and legal system, different from the authoritarian military regime (1964 – 1985), it is difficult to work with a complete relativistic idea of law (positivism) or difficult to accept that law is necessarily oppressive in capitalistic societies. Otherwise the idea of science in law at post-positivistic point of view try to overcome in a dialectic way a pure science methodology (normativistic positivism) and the complete political and economic studies of law (critical legal studies – Marxism). After that, the text will show that Brazilian legal practice have changed intensively after post positivistic methodology of law and will reflect about same dilemmas of post-positivism in Brazil in the legal theory and practice

As implicações do consumo na preservação do ambiente

A sociedade pós-moderna é tendencialmente a sociedade do desperdício, em que coexistem a mais atroz miséria e a opulência mais ostensiva. A sociedade pós-moderna é marcada por profundas assimetrias sociais em que se contrapõem pungentes quadros de escassez a deprimentes situações de abundância, dominadas pelo supérfluo e pelo sumptuário. A sociedade pós-moderna aparta-se dos modelos de equilíbrio e dos quadros de racionalidade que deveriam constituir as coordenadas de um desenvolvimento económico e social sustentado. A concentração da riqueza em um escasso número amplia qual mancha ou nódoa a franja dos excluídos. Os níveis de consumo disparam em estratos determinados e comprimem-se nos mais desfavorecidos. O fenómeno é, porém, preocupante porque tais índices são dominados por estranhos factores de que as estratégias mercadológicas se socorrem no afã de se criarem necessidades artificiais e de se avolumar o desperdício. O consumo de produtos, em particular, tem sido dominado pela reprodução insaciável do número de produtos à disposição do público

A study on exponential-size neighborhoods for the bin packing problem with conflicts

We propose an iterated local search based on several classes of local and large neighborhoods for the bin packing problem with conflicts. This problem, which combines the characteristics of both bin packing and vertex coloring, arises in various application contexts such as logistics and transportation, timetabling, and resource allocation for cloud computing. We introduce $O(1)$ evaluation procedures for classical local-search moves, polynomial variants of ejection chains and assignment neighborhoods, an adaptive set covering-based neighborhood, and finally a controlled use of 0-cost moves to further diversify the search. The overall method produces solutions of good quality on the classical benchmark instances and scales very well with an increase of problem size. Extensive computational experiments are conducted to measure the respective contribution of each proposed neighborhood. In particular, the 0-cost moves and the large neighborhood based on set covering contribute very significantly to the search. Several research perspectives are open in relation to possible hybridizations with other state-of-the-art mathematical programming heuristics for this problem.Comment: 26 pages, 8 figure