Arithmetic fuchsian groups and space time block codes

In the context of space time block codes (STBCs) the theory of arithmetic Fuchsian groups is presented. Additionally, in this work we present a new class of STBCs based on arithmetic Fuchsian groups. This new class of codes satisfies the property full-diversity, linear dispersion and full-rate. Mathematical subject classification: 18B35, 94A15, 20H10

Arithmetic fuchsian groups and space time block codes

In the context of space time block codes (STBCs) the theory of arithmetic Fuchsian groups is presented. Additionally, in this work we present a new class of STBCs based on arithmetic Fuchsian groups. This new class of codes satisfies the property full-diversity, linear dispersion and full-rate. Mathematical subject classification: 18B35, 94A15, 20H10.48549

Emissions from residential pellet combustion of an invasive acacia species

Currently, different types of raw materials are under investigation to fulfil the demand for pellet-based renewable energy. The aim of this study was to experimentally quantify and characterise the gaseous and particulate matter (PM10) emissions from the combustion of a pelletised invasive species growing in the Portuguese coastal areas. The combustion of acacia pellets in a stove used for domestic heating led to a noticeable production of environmentally relevant contaminants, such as carbon monoxide (CO, 2468 ± 485 mg MJ−1), sulphur dioxide (SO2, 222 ± 115 mg MJ−1) and nitrogen oxides (NOx, 478 ± 87 mg MJ−1). Besides gaseous pollutant emissions, substantial particle emissions (118 ± 14 mg MJ−1) were also generated. Particles consisted mostly of inorganic matter, mainly alkaline metals, sulphur and chlorine. About 25%wt. of the PM10 emitted had carbonaceous nature. The chromatographically resolved organic compounds were dominated by anhydrosugars, especially levoglucosan (284 μg g−1 PM10), and several types of phenolic compounds. Retene (8.77 μg g−1 PM10) was the chief compound among polyaromatic hydrocarbons.publishe

Estudo do impacto das deficiências de saneamento básico sobre a saúde pública no Brasil no período de 2001 a 2009

O artigo teve como objetivo desenvolver um estudo do impacto sobre a saúde pública das deficiências do saneamento básico no Brasil no período de 2001 a 2009. Os óbitos resultantes de doenças relacionadas ao saneamento básico inadequado corresponderam, em média, a 13.449 mortes por ano, ou seja, cerca de 1,31% do total. A média anual de casos de notificação compulsória devido a doenças relacionadas ao saneamento básico inadequado foi de 466.351 casos, com uma despesa de R$30.428.324,92 em consultas médicas nesse período. Foi identificada também uma média anual de 758.750 internações hospitalares devido a deficiências do saneamento básico, com uma despesa total de R$ 2.111.567.634,61 no período. A despesa total com consultas médicas e internações hospitalares devido a doenças associadas ao saneamento básico consumiu 2,84% dos gastos do Sistema Único de Saúde nesse intervalo de tempo