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AVALIA O DOS IMPACTOS AMBIENTAIS E SOCIAIS COMO SUBSíDIO PARA LICENCIAMENTO AMBIENTAL DO PROJETO DE ASSENTAMENTO DE REFORMA AGRáRIA MARIA BONITA I, PO O REDONDO/SE  [cached]
Thiago Almeida Leite,Ivana Silva Sobral,Karla Fernanda Barbosa Barreto
Boletim Goiano de Geografia , 2011,
Abstract: O presente trabalho identificou e avaliou os impactos ambientais e sociais negativos do projeto de assentamentode reforma agrária Maria Bonita I, localizado no município de Po o Redondo, Sergipe, visando a subsidiar oprocesso de licenciamento ambiental. Para tal, utilizaram-se duas matrizes: a primeira, adaptada de Leopold,foi usada para classificar qualitativamente os impactos de acordo com seu tipo, natureza, periodicidade, efeito,reversibilidade e alcance; e a segunda foi elaborada por esta pesquisa para listar as atividades impactantes, osimpactos, suas respectivas medidas mitigadoras e os responsáveis em mitigá-las. Em seguida, as atividadesimpactantes foram descritas. Conclui-se que o licenciamento é de fundamental importancia para minimizar osimpactos ambientais e sociais e melhorar a qualidade de vida da popula o, uma vez que as condicionantesambientais devem ser atendidas durante este processo.
Subsystem Codes  [PDF]
Salah A. Aly,Andreas Klappenecker,Pradeep Kiran Sarvepalli
Mathematics , 2006,
Abstract: We investigate various aspects of operator quantum error-correcting codes or, as we prefer to call them, subsystem codes. We give various methods to derive subsystem codes from classical codes. We give a proof for the existence of subsystem codes using a counting argument similar to the quantum Gilbert-Varshamov bound. We derive linear programming bounds and other upper bounds. We answer the question whether or not there exist [[n,n-2d+2,r>0,d]]q subsystem codes. Finally, we compare stabilizer and subsystem codes with respect to the required number of syndrome qudits.
Choice of the Rules of Rational operation for Subsystem of Reservoirs in the Semi-árido Nordestino
Allan Sarmento Vieira,Valterlin da Silva Santos,Wilson Fadlo Curi
Engenharia Ambiental : Pesquisa e Tecnologia , 2010,
Abstract: In the northeastern Brazil great part of the reservoirs presents great taxes of evaporation, high shed outflows and me the quality of its waters. This occurs, in the majority of the cases, had to the favorable climatic situations, due to a rational planning or, even though, for the bad sizing of the water structures. Based in this context, the objective of this research is to choose and to analyze the efficiency of four rules for operation of the reservoirs Engenheiro ávidos and S o Gon alo, considering or not it happened outflow of the river San Francisco. The operation rules, had been evaluated way the application of a simulation model, that uses techniques of sequential programming linear, that they minimize the losses for evaporation and vertimento and maximize the satisfaction of attendance of the demands. The results had demonstrated that the operation rule more efficiency for the system was with the volume the equal goal 75% of the capacity of the reservoirs, disclosing that the reservoirs look for to store water of the period of rain. Considering the happened outflow of the transposition of the River San Francisco, we can conclude that the adjusted rules of operation more, had been those that had presented the biggest synergetic profits
Subsystem Code Constructions  [PDF]
Salah A. Aly,Andreas Klappenecker
Mathematics , 2007,
Abstract: Subsystem codes are the most versatile class of quantum error-correcting codes known to date that combine the best features of all known passive and active error-control schemes. The subsystem code is a subspace of the quantum state space that is decomposed into a tensor product of two vector spaces: the subsystem and the co-subsystem. A generic method to derive subsystem codes from existing subsystem codes is given that allows one to trade the dimensions of subsystem and co-subsystem while maintaining or improving the minimum distance. As a consequence, it is shown that all pure MDS subsystem codes are derived from MDS stabilizer codes. The existence of numerous families of MDS subsystem codes is established. Propagation rules are derived that allow one to obtain longer and shorter subsystem codes from given subsystem codes. Furthermore, propagation rules are derived that allow one to construct a new subsystem code by combining two given subsystem codes.
INTERNACIONALIZA O NO SETOR SUCROALCOOLEIRO NORDESTINO
Edjackson Marques Ferreira,Andre Gustavo Carvalho Machado,Walter Fernando Araújo Moraes
InternexT : Revista Eletr?nica de Negócios Internacionais da ESPM , 2010,
Abstract: O objetivo deste artigo consiste em analisar as manifesta es dos principais conceitos-chave das teorias de internacionaliza o a partir da trajetória de empresas pertencentes ao setor sucroalcooleiro nordestino. Seis teorias foram selecionadas para nortear a análise empreendida: Ciclo de Vida, Modelo Uppsala, Escolha Adaptativa, o Paradigma Eclético, Vis o Baseada em Recursos e Modelo Diamante. A estratégia de pesquisa adotada foi a de estudo de caso. Os dados foram coletados por meio de documentos do setor e de entrevistas semi-estruturadas. Na etapa de análise dos dados, foi utilizado o software Atlas.ti. Como resultado, evidenciou-se que, nas empresas do setor sucroalcooleiro nordestino, há forte presen a de aspectos relacionados à localiza o e recursos internos, oriundos no Modelo de Diamante, no Paradigma Eclético e no modelo de Vis o Baseada em Recursos. Observa-se, ainda, que a forma o de uma forte rede interna, contemplada pela Teoria de Redes, também se mostrou importante para compreens o de tal fen meno. As demais teorias analisadas tornaram-se menos aplicáveis, principalmente (a) pela natureza típica do setor sucroalcooleiro no estado da Paraíba, centrada em exporta o indireta, e (b) por corresponder a produtos fortemente padronizados.
Propagation Rules of Subsystem Codes  [PDF]
Salah A. Aly
Mathematics , 2008,
Abstract: We demonstrate propagation rules of subsystem code constructions by extending, shortening and combining given subsystem codes. Given an $[[n,k,r,d]]_q$ subsystem code, we drive new subsystem codes with parameters $[[n+1,k,r,\geq d]]_q$, $[[n-1,k+1,r,\geq d-1]]_q$, $[[n,k-1,r+1,d]]_q$. The interested readers shall consult our companion papers for upper and lower bounds on subsystem codes parameters, and introduction, trading dimensions, families, and references on subsystem codes [1][2][3] and references therein.
Poèmes  [cached]
Sonia Lamontagne
Voix Plurielles , 2013,
Abstract: Poèmes
Encoding Subsystem Codes  [PDF]
Pradeep Kiran Sarvepalli,Andreas Klappenecker
Physics , 2008,
Abstract: In this paper we investigate the encoding of operator quantum error correcting codes i.e. subsystem codes. We show that encoding of subsystem codes can be reduced to encoding of a related stabilizer code making it possible to use all the known results on encoding of stabilizer codes. Along the way we also show how Clifford codes can be encoded. We also show that gauge qubits can be exploited to reduce the encoding complexity.
Topological Subsystem Codes  [PDF]
H. Bombin
Physics , 2009, DOI: 10.1103/PhysRevA.81.032301
Abstract: We introduce a family of 2D topological subsystem quantum error-correcting codes. The gauge group is generated by 2-local Pauli operators, so that 2-local measurements are enough to recover the error syndrome. We study the computational power of code deformation in these codes, and show that boundaries cannot be introduced in the usual way. In addition, we give a general mapping connecting suitable classical statistical mechanical models to optimal error correction in subsystem stabilizer codes that suffer from depolarizing noise.
Average Entropy of a Subsystem  [PDF]
Don N. Page
Physics , 1993, DOI: 10.1103/PhysRevLett.71.1291
Abstract: If a quantum system of Hilbert space dimension $mn$ is in a random pure state, the average entropy of a subsystem of dimension $m\leq n$ is conjectured to be $S_{m,n}=\sum_{k=n+1}^{mn}\frac{1}{k}-\frac{m-1}{2n}$ and is shown to be $\simeq \ln m - \frac{m}{2n}$ for $1\ll m\leq n$. Thus there is less than one-half unit of information, on average, in the smaller subsystem of a total system in a random pure state.
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