Separabilidade, ramificação e diferente

Orientador: Antonio PaquesDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matematica, Estatistica e Computação CientificaResumo: Não informado.Abstract: Not informed.MestradoMestre em Matemátic

Rotated DnD_n-lattices in dimensions power of 33

In this work, we present constructions of families of rotated $D_n$-lattices which may be good forsignal transmission over both Gaussian and Rayleigh fading channels. The lattices are obtained as sublattices of a family of rotated $\mathbb{Z} \oplus \mathcal{A}_{2}^{k}$ lattices, where $\mathcal{A}_{2}^{k}$ is a direct sum of $k=\frac{3^{r-1}-1}{2}$ copies of the $A_2$-lattice, using free $\mathbb{Z}$-modules in $\mathbb{Z}[\zeta_{3^{r}}+\zeta_{3^{r}}^{-1}]$

Trace Forms of Certain Subfields of Cyclotomic Fields and Applications

In this work, we present a explicit trace forms for maximal real subfields of cyclotomic fields as tools for constructing algebraic lattices in Euclidean space with optimal center density. We also obtain a closed formula for the Gram matrix of algebraic lattices obtained from these subfields. The obtained lattices are rotated versions of the lattices Λ9,Λ10\Lambda_9, \Lambda_{10}Λ​9​​,Λ​10​​ and Λ11\Lambda_{11}Λ​11​​ and they are images of Z\mathbb{Z}Z-submodules of rings of integers under the twisted homomorphism, and these constructions, as algebraic lattices, are new in the literature. We also obtain algebraic lattices in odd dimensions up to 777 over real subfields, calculate their minimum product distance and compare with those known in literatura, since lattices constructed over real subfields have full diversity

Análise das estratégias de comercialização de energia elétrica de agentes geradores no ambiente de curto prazo

The development of the electric energy market has gained visibility due to the recent transformations in energy policies in Brazil and worldwide. For many years, investments were not made in the Brazilian electricity sector, causing a delay in the energy matrix. With this, the government implemented measures for structural and institutional reforms in the electricity sector with the objective of guaranteeing the expansion of the generating park, attracting private investment, and promoting market competition. The restructuring of the electricity sector led to the emergence of new ways to negotiate energy, new structures and entities, with the objective of increasing transparency, competitiveness and efficiency among market agents. In the new model of the Brazilian Electricity Sector (SEB), energy trading is carried out through two contracting environments, the Regulated Contracting Environment (ACR) and the Free Contracting Environment (ACL). This research analyzes the electric energy commercialization strategies through generation agents acting and competing in the short-term energy market, through the use of competitiveness graphs.O desenvolvimento do mercado de energia elétrica ganhou visibilidade em virtude das recentes transformações nas políticas energéticas no Brasil e no mundo. Durante muito anos, investimentos não foram realizados no setor elétrico brasileiro, ocasionando um atraso na matriz energética. Com isso, o governo implementou medidas para reformas estruturais e institucionais no setor elétrico com objetivo de garantir a expansão do parque gerador, atrair investimentos privados e promover à concorrência do mercado. A reestruturação do setor elétrico levou ao aparecimento de novas formas de negociar energia, novas estruturas e entidades, com o objetivo de aumentar a transparência, a competitividade e a eficiência entre os agentes de mercado. No novo modelo do Setor Elétrico Brasileiro (SEB), a comercialização de energia é efetivada através de dois ambientes de contratação, o Ambiente de Contratação Regulado (ACR) e o Ambiente de Contratação Livre (ACL). Esta pesquisa analisa as estratégias de comercialização de energia elétrica por meio de agentes de geração atuando e competindo no mercado de energia de curto prazo, por meio da utilização de gráficos de competitividade

Diesel engine performance and emission analysis using soybean biodiesel

Biodiesel presents a large potential for replacing other fossil-based fuels. Thus, the present work aimed to assess the specific fuel consumption (SFC), thermal efficiency and emissions of nitric oxide (NO) and nitrogen oxides (NOx), in a cycle diesel engine-generator set, using soybean biodiesel and diesel as fuels. The experiment was carried out at Western Paraná State University (UNIOESTE), Cascavel Campus. The engine-generator set used in the study was a model BD 6500CF with 7.36 kW (10 cv) of power and 5.5 kVA/5.0 kW of nominal power, with an average output tension of 120/240 V monophase. Fuels used were soybean biodiesel (B100) and diesel oil (B0). Nominal loads applied varied between 1.0 and 5.0 kW. In order to quantify gas emissions, a combustion and emission quality analyzer was used; model PCA®3, Bacharach inc. Soybean biodiesel presented an average consumption increase of 4.3% in all resistive loads, what shows large potential for the usage of soybean biodiesel in the generation of energy, without causing raises in the specific fuel consumption. Soybean biodiesel efficiency has proved to be superior to that of diesel in all resistive loads. As for the emissions, soybean biodiesel provided a reduction of 64% (NO) and 54% (NOx) when compared with diesel oil.Keywords: Combustion gases, energy generation, specific fuel consumptionAfrican Journal of Biotechnology Vol. 12(19), pp. 2633-263

Adaptability and phenotypic stability of sugarcane clones

O objetivo deste trabalho foi selecionar clones de cana-de-açúcar (Saccharum officinarum) superiores, com boa estabilidade e adaptabilidade, ao se considerar a interação genótipo x ambiente em dois ciclos produtivos. Vinte e cinco clones precoces mais cinco clones testemunhas foram avaliados durante dois cortes (cana-soca e cana-planta), em 24 ambientes. Utilizou-se o delineamento experimental de blocos ao acaso, com três repetições. Foram avaliadas toneladas de colmos por hectare e toneladas de pol por hectare. Para a verificação da adaptabilidade e da estabilidade, foram utilizados os métodos de regressão bissegmentada e multivariados (AMMI e GGE biplot). De acordo com os três métodos, que são complementares nas informações desejadas, os clones mais promissores em termos de estabilidade e adaptabilidade geral são G5, G12 e G13; estes dois últimos são os mais próximos do genótipo ideal. O clone G13 é altamente produtivo nos ambientes favoráveis e desfavoráveis, tendo apresentado as maiores médias para tonelada de colmos e de pol por hectare. Os clones G3, G4, G10, G15, G17, G18, G22, G23, G25, G26 e G30 não são recomendados para os 24 ambientes avaliados.The objective of this work was to select superior sugarcane (Saccharum officinarum) clones with good stability and adaptability, considering the genotype x environment interaction in two productive cycles. Twenty-five early clones plus five control clones were evaluated during two cuts (ratoon cane and plant cane) in 24 environments. A randomized complete block design was used, with three replicates. Tons of stems per hectare and tons of pol per hectare were evaluated. To verify adaptability and stability, the bisegmented regression and the multivariate (AMMI and GGE biplot) methods were used. According to the three methods, which are complementary regarding the desired information, the most promising clones in terms of stability and general adaptability are G5, G12, and G13; the last two are closest to the ideal genotype. The G13 clone is highly productive in favorable and unfavorable environments, presenting the highest averages for ton of stems and pol per hectare. The G3, G4, G10, G15, G17, G18, G22, G23, G25, G26, and G30 clones are not recommended for the 24 evaluated environments