A method for Sampling Bernoulli Variables

We introduce new method for generating correlated or uncorrelated Bernoulli random variables by using the binary expansion of a continuous random variable with support on the unit interval. We show that when this variable has a symmetric probability density function around 12 , its binary expansion provides equiprobable bits over {0, 1}. In addition we prove that when the random variable is uniformly distributed over [0, 1], its binary expansion generates independent Bernoulli random variables. Moreover, we give examples where, by choosing some parameterized nonuniform probability density functions over [0, 1], samples of Bernoulli variables with specific correlation values are generated.Comment: 11 pages, 3 figure

Distributional Transform Based Information Reconciliation

In this paper we present an information reconciliation protocol designed for Continuous-Variable QKD using the Distributional Transform. By combining tools from copula and information theories, we present a method for extracting independent symmetric Bernoulli bits for Gaussian modulated CVQKD protocols, which we called the Distributional Transform Expansion (DTE). We derived the expressions for the maximum reconciliation efficiency for both homodyne and heterodyne measurement, which, for the last one, efficiency greater than 0.9 is achievable at signal to noise ratio lower than -3.6 dBComment: 6 pages, 3 Figures, Conference pape

Genetic improvement of forest tree species

Brazilian forestry sector is considered one of the most developed in the world, being the base for important industrialsegments which use wood as raw material. Tree breeding has played an important role on improving the competitiveness ofBrazilian forestry-based companies, especially for its positive reflexes on increasing adaptation, forestry productivity and woodquality. In spite of the importance of other forest trees for the economy, such as Schizolobium, Araucaria, Populus and Hevea, themain genera under genetic improvement in the country are Eucalyptus, Pinus, Acacia and Tectona. They are used by industries likepulp and paper, siderurgy, tannin, chips for exportation and lumber, constituting an important source of revenues for the Brazilian’seconomy, besides their positive social and environmental impacts. This paper presents a generic approach to genetic improvementaspects of these four major genera currently undergoing breeding in Brazil

Entanglement-assisted Quantum Codes from Algebraic Geometry Codes

Quantum error correcting codes play the role of suppressing noise and decoherence in quantum systems by introducing redundancy. Some strategies can be used to improve the parameters of these codes. For example, entanglement can provide a way for quantum error correcting codes to achieve higher rates than the one obtained via the traditional stabilizer formalism. Such codes are called entanglement-assisted quantum (QUENTA) codes. In this paper, we use algebraic geometry codes to construct several families of QUENTA codes via the Euclidean and the Hermitian construction. Two of the families created have maximal entanglement and have quantum Singleton defect equal to zero or one. Comparing the other families with the codes with the respective quantum Gilbert-Varshamov bound, we show that our codes have a rate that surpasses that bound. At the end, asymptotically good towers of linear complementary dual codes are used to obtain asymptotically good families of maximal entanglement QUENTA codes. Furthermore, a simple comparison with the quantum Gilbert-Varshamov bound demonstrates that using our construction it is possible to create an asymptotically family of QUENTA codes that exceeds this bound.Comment: Some results in this paper were presented at the 2019 IEEE International Symposium on Information Theor

Território e trabalho: análise geoeconômica com base em trajetórias camponesas

A pesquisa tem como foco a análise da configuração territorial rural do município de Mocajuba, que se localiza na região do Baixo-Tocantins. Com base na teoria de trajetórias tecnológicas rurais para a Amazônia, foi estudada a especificidade da economia camponesa, particularmente seu segmento baseado no agroextrativismo. Com isso objetiva-se indicar os tipos e percentuais de uso e cobertura da terra que os agentes da trajetória camponesa T2, empregam no território. Por meio do processamento de dados de satélite em associação a dados econométricos, concluise que os territórios onde se encontram as trajetórias agroextrativistas, apresentam níveis de conservação florestal consideráveis, se comparados a outras trajetórias. Pode-se afirmar ainda que o trabalho é parâmetro fundamental de alocação espacial, por expressar-se em extensão, mobilidade e padrões de alocação, bem como o território, que neste contexto torna-se o atributo essencial de fundamentação do trabalho