Levantamento pedológico semidetalhado (1:25.000) da microbacia da Água Três Unidos, município de Vera Cruz (SP).

2002

Levantamento semidetalhado dos solos da bacia Rio Jardim-DF escala 1:50.000.

2000

Levantamento semidetalhado dos solos da bacia do Olaria - DF escala 1:30.000.

2000

Levantamento de solos do Parque Nacional de Brasília, escala 1:50.000.

2008

Levantamento pedológico semi-detalhado (1:30.000) do Parque Estadual da Mata Seca, Município de Manga - MG.

Um dos pré-requisitos para o sucesso na seleção e implantação de áreas de pesquisa é o conhecimento preciso da distribuição dos solos e de seus atributos na paisagem. Isso pode ser obtido com o levantamento e mapeamento pedológico convencional e/ou através de técnicas de mapeamento digital de solos (MDS). Este trabalho apresenta os solos identificados no Parque Estadual da Mata Seca (PEMS), localizado no município de Manga, região norte do Estado de Minas Gerais. É parte integrante de um projeto maior, cujo objetivo é explorar novas técnicas de MDS em pequenas extensões territoriais, avaliar e validar seus produtos e estabelecer um protocolo de procedimentos para tal. Abrangendo a extensão de 10.281,44 ha, o PEMS tem sua geologia associada a coberturas cenozóicas derivadas de: (a) rochas pelíticocarbonáticas que compõem o Grupo Bambuí, de idade proterozóica, (b) arenitos cretáceos do Grupo Urucuia e, (c) depósitos quarternários resultantes do retrabalhamento do rio São Francisco. Os tipos e diversidade de material de origem foram os fatores preponderantes na formação e distribuição dos solos e na sua relação com os demais elementos formadores da paisagem local. Em termos gerais, a seguinte relação solo-paisagem pode ser observada na área: Latossolos Amarelos e Vermelho-Amarelos distróficos e de textura média ocupam os platôs (chapada) de relevo predominantemente plano, situados nas cotas mais elevadas do PEMS e sob domínio das coberturas relacionadas aos arenitos do Grupo Urucuia. A vegetação de Carrasco é exclusiva e marcante dessa paisagem, seja observando-a in loco, seja por meio de imagens de sensores remotos. Há uma faixa transicional entre esses domínios e aqueles situados em cotas ligeiramente inferiores, que são influenciados exclusivamente pelas rochas calcárias. A existência de eutrofismo associado à textura média em Latossolos Vermelho-Amarelos, Vermelhos, Chernossolos e Cambissolos (latossólicos), bem como a vegetação de Caatinga Arbórea Densa (de médio porte) são evidências do caráter transicional. As paisagens sob domínio das rochas pelítico-carbonáticas em que se desenvolve a Floresta Estacional Decidual Densa de alto porte (Mata Seca) são de maior extensão e complexidade na área. Nelas, o relevo e a proximidade do material de origem exercem ação modificadora na formação dos solos. As seguintes subordens taxonômicas foram observadas nesse domínio fisiográfico:Cambissolos Háplicos, Latossolos Vermelhos e Vermelhos-Amarelos, Chernossolos Háplicos e Argilúvicos, Vertissolos Háplicos, Plintossolos Pétricos, Gleissolos Háplicos e Melânicos. Dentre estas, os Latossolos Vermelho- Amarelos e Vermelhos juntamente aos Cambissolos Háplicos dominam em extensão, distribuindo-se em aproximadamente 87,0% das áreas sob influência calcária. Finalmente, nos depósitos quaternários do rio São Francisco, em relevo plano e sob Floresta Tropical Pluvial Perenifólia, foram mapeados Cambissolos Flúvicos e Neossolos Flúvicos em condições de boa drenagem, enquanto os Gleissolos Háplicos ocorrem nas áreas deprimidas, permanente ou temporariamente inundadas.

Análisis mesoclimático de las cartas topográficas Santa Rosa y Villa María (1:250.000) de la provincia de Córdoba (Argentina)

p.73-76

Ensayo de identificación y cartografía mediante fotografía aérea de unidades de vegetación natural (Torrelaguna, hoja 509 MTN 1:50.000)

Se realiza un ensayo metodológico que nos permite valorar el poder de discriminación, el grado de utilidad y dificultades de empleo de la fotografla aérea, para cartografía de vegetación actual en territorios de gran complejidad. Se cartografían 29 tipos de vegetación, para los cuales, agrupados por clases, se dan características para su fotointerpretación.

Job strain and the risk of severe asthma exacerbations: A meta-analysis of individual-participant data from 100 000 European men and women

Background: Many patients and healthcare professionals believe that work-related psychosocial stress, such as job strain, can make asthma worse, but this is not corroborated by empirical evidence. We investigated the associations between job strain and the incidence of severe asthma exacerbations in working-age European men and women. Methods: We analysed individual-level data, collected between 1985 and 2010, from 102 175 working-age men and women in 11 prospective European studies. Job strain (a combination of high demands and low control at work) was self-reported at baseline. Incident severe asthma exacerbations were ascertained from national hospitalization and death registries. Associations between job strain and asthma exacerbations were modelled using Cox regression and the study-specific findings combined using random-effects meta-analyses. Results: During a median follow-up of 10 years, 1 109 individuals experienced a severe asthma exacerbation (430 with asthma as the primary diagnostic code). In the age- and sex-adjusted analyses, job strain was associated with an increased risk of severe asthma exacerbations defined using the primary diagnostic code (hazard ratio, HR: 1.27, 95% confidence interval, CI: 1.00, 1.61). This association attenuated towards the null after adjustment for potential confounders (HR: 1.22, 95% CI: 0.96, 1.55). No association was observed in the analyses with asthma defined using any diagnostic code (HR: 1.01, 95% CI: 0.86, 1.19). Conclusions: Our findings suggest that job strain is probably not an important risk factor for severe asthma exacerbations leading to hospitalization or death.

Programa de Acción Social : más de 1.400.000 euros para ayudas a docentes.

El programa de Acción Social presenta un conjunto de ayudas destinadas a mejorar la calidad de vida del funcionario docente y la de su familia. Hay ayudas por violencia de género, por nupcialidad, por natalidad y adopción, por defunción, por tratamiento del tabaquismo, para la reproducción asistida, por discapacidad o para tratamientos psicológicos o psiquiátricos entre otras.

Simple measures of climate, soil properties and plant traits predict national scale grassland soil carbon stocks

1. Soil carbon (C) storage is a key ecosystem service. Soil C stocks play a vital role in soil fertility and climate regulation, but the factors that control these stocks at regional and national scales are unknown, particularly when their composition and stability are considered. As a result, their mapping relies on either unreliable proxy measures or laborious direct measurements. 2. Using data from an extensive national survey of English grasslands we show that surface soil (0-7cm) C stocks in size fractions of varying stability can be predicted at both regional and national scales from plant traits and simple measures of soil and climatic conditions. 3. Soil C stocks in the largest pool, of intermediate particle size (50-250 µm), were best explained by mean annual temperature (MAT), soil pH and soil moisture content. The second largest C pool, highly stable physically and biochemically protected particles (0.45-50 µm), was explained by soil pH and the community abundance weighted mean (CWM) leaf nitrogen (N) content, with the highest soil C stocks under N rich vegetation. The C stock in the small active fraction (250-4000 µm) was explained by a wide range of variables: MAT, mean annual precipitation, mean growing season length, soil pH and CWM specific leaf area; stocks were higher under vegetation with thick and/or dense leaves. 4. Testing the models describing these fractions against data from an independent English region indicated moderately strong correlation between predicted and actual values and no systematic bias, with the exception of the active fraction, for which predictions were inaccurate. 5. Synthesis and Applications: Validation indicates that readily available climate, soils and plant survey data can be effective in making local- to landscape-scale (1-100,000 km2) soil C stock predictions. Such predictions are a crucial component of effective management strategies to protect C stocks and enhance soil C sequestration.

Intercomparison of methods of coupling between convection and large-scale circulation: 1. Comparison over uniform surface conditions

As part of an international intercomparison project, a set of single column models (SCMs) and cloud-resolving models (CRMs) are run under the weak temperature gradient (WTG) method and the damped gravity wave (DGW) method. For each model, the implementation of the WTG or DGW method involves a simulated column which is coupled to a reference state defined with profiles obtained from the same model in radiative-convective equilibrium. The simulated column has the same surface conditions as the reference state and is initialized with profiles from the reference state. We performed systematic comparison of the behavior of different models under a consistent implementation of the WTG method and the DGW method and systematic comparison of the WTG and DGW methods in models with different physics and numerics. CRMs and SCMs produce a variety of behaviors under both WTG and DGW methods. Some of the models reproduce the reference state while others sustain a large-scale circulation which results in either substantially lower or higher precipitation compared to the value of the reference state. CRMs show a fairly linear relationship between precipitation and circulation strength. SCMs display a wider range of behaviors than CRMs. Some SCMs under the WTG method produce zero precipitation. Within an individual SCM, a DGW simulation and a corresponding WTG simulation can produce different signed circulation. When initialized with a dry troposphere, DGW simulations always result in a precipitating equilibrium state. The greatest sensitivities to the initial moisture conditions occur for multiple stable equilibria in some WTG simulations, corresponding to either a dry equilibrium state when initialized as dry or a precipitating equilibrium state when initialized as moist. Multiple equilibria are seen in more WTG simulations for higher SST. In some models, the existence of multiple equilibria is sensitive to some parameters in the WTG calculations.

Análise de transformações geométricas para o georreferenciamento de imagens do satélite CBERS-1

Neste trabalho serão descritos métodos e técnicas na análise de transformações geométricas para o georreferenciamento de imagens do satélite CBERS I, utilizando o sensor CCD na região de Porto Alegre, com a utilização das transformações afim e equações projetivas e com o uso de pontos de apoio coletados com receptor GPS. Os resultados experimentais obtidos com as transformações afim e equações projetivas são animadores, recomendando-se então continuar os estudos para as imagens do CBERS-I que pode ser um atalho importante para atualizar a cartografia regional brasileira, pois neste caso do sensor CCD se vislumbra a possibilidade de se gerarem cartas imagens nas escalas de 1:100.000 e 1:50.000.

Nature of potential barrier in (Ca-1/4,Cu-3/4)TiO3 polycrystalline perovskite

The nonohmic electrical features of (Ca-1/4,Cu-3/4)TiO3 perovskite ceramics, which have very strong gigantic dielectric is believed originate from potential barriers at the grain boundaries. In the present study, we used the admittance and impedance spectroscopy technique to investigate (Ca-1/4,Cu-3/4)TiO3 perovskite ceramics with low nonohmic electrical properties. The study was conducted under two different conditions: on as-sintered ceramics and on ceramics thermally treated in an oxygen-rich atmosphere. The results confirm that thermal treatment in oxygen-rich atmospheres influence the nonohmic properties. Annealing at oxygen-rich atmospheres improve the nonohmic behavior and annealing at oxygen-poor atmospheres decrease the nonohmic properties, a behavior already reported for common metal oxide nonohmic devices and here firstly evidenced for the (Ca-1/4,Cu-3/4)TiO3 perovskite related materials. The results show that oxygen also influences the capacitance values at low frequencies, a behavior that is indicative of the Schottky-type nature of the potential barrier. (c) 2006 Elsevier Ltd. All rights reserved.

Structural refinement and photoluminescence properties of cube-like (Ca 1-xCu x)TiO 3 crystals synthesized by the microwave-hydrothermal method

In this work, (Ca 1-xCu x)TiO 3 crystals with (x = 0, 0.01 and 0.02), labeled as CTO, CCTO1 and CCTO2, were synthesized by the microwave-hydrothermal method at 140°C for 32 min. XRD patterns (Fig. 1), Rietveld refinement and FT-Raman spectroscopy indicated that these crystals present orthorhombic structure Pbnm. Micro-Raman and XANES spectra suggested that the substitution of Ca by Cu in A-site promoted a displacement of the [TiO6]-[TiO6] clusters adjacent from its symmetric center, which leads distortions on the [CaO 12] clusters neighboring and consequently cause the strains into the CaTiO3 lattice. FE-SEM images showed that these crystals have an irregular shape as cube like probably indicating an Ostwald-ripening and self-assemble as dominant mechanisms to crystals growth. The powders presented an intense PL blue-emission.