Cultivo do milho irrigado.

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Performance of a Low Noise Front-end ASIC for Si/CdTe Detectors in Compton Gamma-ray Telescope

Compton telescopes based on semiconductor technologies are being developed to explore the gamma-ray universe in an energy band 0.1--20 MeV, which is not well covered by the present or near-future gamma-ray telescopes. The key feature of such Compton telescopes is the high energy resolution that is crucial for high angular resolution and high background rejection capability. The energy resolution around 1 keV is required to approach physical limit of the angular resolution due to Doppler broadening. We have developed a low noise front-end ASIC (Application-Specific Integrated Circuit), VA32TA, to realize this goal for the readout of Double-sided Silicon Strip Detector (DSSD) and Cadmium Telluride (CdTe) pixel detector which are essential elements of the semiconductor Compton telescope. We report on the design and test results of the VA32TA. We have reached an energy resolution of 1.3 keV (FWHM) for 60 keV and 122 keV at 0 degree C with a DSSD and 1.7 keV (FWHM) with a CdTe detector.Comment: 6 pages, 7 figures, IEEE style file, to appear in IEEE Trans. Nucl. Sc

AEMIP robust inversion using maximum phase angle Cole–Cole model re-parameterisation applied for HTEM survey over Lamego gold mine, Quadrilátero Ferrífero, MG, Brazil

This paper presents the results of airborne electromagnetic induced polarisation inversions using the Maximum Phase Angle (MPA) model for a helicopter time domain survey in the Quadril\ue1tero Ferr\uedfero area, Minas Gerais State (MG), Brazil. The inversions were conducted using a laterally constrained robust scheme, in order to decrease the difficulties to recover the multi-parametric model in a very ill-posed inverse problem, often found in induced polarisation studies. A set of six flight lines over the Lamego gold mine mineralised structure were inverted using the MPA re-parameterisation of the Cole\u2013Cole model and also the classical resistivity-only parameterisation, in order to understand the implications of the induced polarisation effect in the data and, consequently, in the resistivity model. A synthetic study was also conducted, seeking to understand what to expect from the resistivity-only inversions in the real data. According to borehole lithological data and previous structural knowledge from the literature, the results from the Maximum Phase Angle approach indicate an important chargeable body that seems to be in good agreement with a sulfide enriched carbonaceous/graphite and altered mafic unities, which are important markers for the gold mineralisation

Uso da torta de mamona como alternativa à adubação química para morangueiro.

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Differences in the Prevalence of Non-Communicable Disease between Slum Dwellers and the General Population in a Large Urban Area in Brazil.

Residents of urban slums are at greater risk for disease than their non-slum dwelling urban counterparts. We sought to contrast the prevalences of selected non-communicable diseases (NCDs) between Brazilian adults living in a slum and the general population of the same city, by comparing the age and sex-standardized prevalences of selected NCDs from a 2010 survey in Pau da Lima, Salvador Brazil, with a 2010 national population-based telephone survey. NCD prevalences in both populations were similar for hypertension (23.6% (95% CI 20.9⁻26.4) and 22.9% (21.2⁻24.6), respectively) and for dyslipidemia (22.7% (19.8⁻25.5) and 21.5% (19.7⁻23.4)). Slum residents had higher prevalences of diabetes mellitus (10.1% (7.9⁻12.3)) and of overweight/obesity (46.5% (43.1⁻49.9)), compared to 5.2% (4.2⁻6.1) and 40.6% (38.5⁻42.8) of the general population in Salvador. Fourteen percent (14.5% (12.1⁻17.0)) of slum residents smoked cigarettes compared to 8.3% (7.1⁻9.5) of the general population in Salvador. The national telephone survey underestimated the prevalence of diabetes mellitus, overweight/obesity, and smoking in the slum population, likely in part due to differential sampling inside and outside of slums. Further research and targeted policies are needed to mitigate these inequalities, which could have significant economic and social impacts on slum residents and their communities

Pneumonia a Legionella pneumophila. Um estudo retrospectivo.

SUMMARYLegionella pneumophila (LP) is a common bacteria of the environment, and it is an agent responsible for severe community acquired pneumonia (CAP). We analyzed the, 12 patients with Lp pneumonia admitted in our Respiratory ICU during the last 10 years (1986-1996). They represented 6,7% of CAP. Eleven patients were males and 1 female, with mean age 49,6±11,9years. TISS was 25,8±9,5 and APACRE II 23,4±6,5. All, but 1 patient, were under mechanical ventilation (MV) during a mean period of 11,5±12,5 (min: 1, max:44) days.Four pneumonias occurred beyond the season, while only 4 patients had an epidemiological history. Only 1 patient had no risk factor. In all the others tobacco smoking and alcohol abuse were quite frequent. Diagnosis was based on serologic test and culture or direct fluorescent antibody staining of bronchial secretions.Eleven patients had a multisystemic disease with hepatic dysfunction in 9, renal failure in 7 (due to rhabdomyolysis in 4). One patient had a endocarditis and another developped ARDS. Nosocomial septicaemie occurred in 5 patients.Mortality rate was 58,3%. Deceased patients bad initially higher APACHE n, (A-a) 02, and lower natremia. Comparing Lp pneumonia with the other CAP (n=166), both submitted to MV, the higher mortality rate was not significant statisticly (58,3% versus 31,8%). In conclusion Lp pneumonia can occur all over the year. There was a high incidence of severe complications and outcome was similar to the other CAP when requiring MV.REV PORT PNEUMOL 1998; IV (2): 139-14