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Porto Alegre, Brazil

McManus C.,Av. Bento Goncalves | Louvandini H.,University of Brasilia | Gugel R.,University of Brasilia | Sasaki L.C.B.,University of Brasilia | And 4 more authors.
Tropical Animal Health and Production | Year: 2011

The objective of this study was to evaluate and compare physical parameters in groups of sheep with different phenotypic characteristics in the Centre-west region of Brazil. Five groups of sheep, with nine animals per group, were selected, three groups of Santa Inês animals with different coat colours (white, brown and black), one group with crossbred animals (Santa Inês × Bergamasca) and one group with animals of the Bergamasca breed. The following traits were evaluated: coat thickness, number and length of hair, pigmentation level in the coat and the skin as well as the percentage area of sweats glands in the skin tissue, carried out by histological analysis. The number of hairs and the area of sweats glands were not significantly different between the evaluated groups. The Bergamasca breed showed low pigmentation of the skin and long hairs. The levels of pigmentation of the hair and of the skin were highly correlated. Between the Santa Inês groups, the group with white hair showed the better parameters for heat adaptation, while the brown hair group showed the lower heat adaptation when compared with another hair breed groups. © 2010 Springer Science+Business Media B.V. Source

Vieira S.L.,Federal University of Rio Grande do Sul | Anschau D.L.,Federal University of Rio Grande do Sul | Stefanello,Federal University of Rio Grande do Sul | Serafini N.C.,Federal University of Rio Grande do Sul | And 3 more authors.
Journal of Applied Poultry Research | Year: 2015

A study was conducted to evaluate the effects of phytase supplementation on growth performance, phosphorus availability, and bone mineralization in broilers. Three hundred fifty Cobb Cobb 500 slow-feathering male broilers were placed in steel battery cages into 7 treatments with 10 replications of 5 chicks each. The treatments were: A positive control (PC) diet [0.42% nonphytate phosphorus (nPP)], 4 diets containing increases in nPP from dicalcium phosphate (0.14, 0.20, 0.26, and 0.32%), and 2 phytase supplemental levels [500 and 1,000 phytase units (FYT)/kg] on the diet having 0.14% nPP. All diets contained 0.8% calcium.Growth performance and bone data were regressed against the 4 diets having increased nPP. The equations generated were replaced by the corresponding performance obtained with 2 phytase levels to estimate their nPP bioequivalence. An overall reduction in performance and bone mineralization was observed associated with a reduction in nPP. Linear fits provided the best adjustments for all responses with the exceptions of BW gain (BWG) and feed intake (FI). Adding phytase to the 0.14% nPP diet improved growth performance and bone mineralization (P < 0.001). Average bioequivalence nPP for each phytase level was dependent on the evaluated response with lowest and highest values at 500 FYT supplementation of 0.077 and 0.145 for toe P and femur Ca, respectively, whereas lowest and highest values at 1,000 FYT of 0.143 and 0.194 for BWG and toe ash. Averaging all values for 500 and 1,000 FYT provided estimations of 0.100 and 0.166 nPP, respectively. © 2015 Poultry Science Association Inc. Source

Husemann R.,Federal University of Rio Grande do Sul | Susin A.A.,Av. Osvaldo Aranha | Roesler V.,Av. Bento Goncalves | De Lima J.V.,Av. Bento Goncalves
Proceedings - SBCCI2011: 24th Symposium on Integrated Circuits and Systems Design | Year: 2011

The emergent standard H.264/SVC (scalable video coding) combines distinct complex techniques in order to allow efficient data compression considering data among consecutive layers. In practice, a complete implementation of this scalable encoder is not trivial, since the global complexity increases proportionally with the number of layers involved. Considering that, this paper proposes an innovative scalable architecture, which adopts a flexible approach able to reuse computational hardware modules in order to perform iteratively the SVC intra computational coding, for both the base layer and enhancement layers. In order to validate this proposal it was implemented in VHDL and compared with other conventional hardware approaches, confirming significant gain in terms of occupied memory and total chip area. © 2011 ACM. Source

Xavier M.B.,Av. Bento Goncalves | Rolim S.B.A.,Av. Bento Goncalves
Revista Brasileira de Geofisica | Year: 2012

Since 1950, ground gravity data of the Rio Grande do Sul State (RS), Brazil, have been systematically collected by the Department of Geodesy of the Universidade Federal do Rio Grande do Sul (UFRGS) and other institutions in a total of 7.218 points. This paper proposes three methods for detection of gross errors in this database, based on: 1) the digital elevation model of Shuttle Radar Topography Mission (SRTM), 2) the Gravity Recovery and Climate Experiment (GRACE), and 3) the interpolated observations of ground gravity observations (Bouguer anomaly). The 1st method identified 217 points of altimetry, representing 3.00% of the database. The 2nd identified 645 points of gravity observations, representing 8.93% of the database. The 3rd method identified 60 points of land gravimetric observations, representing 0.83% of the database. The criterion to eliminate the observations was based on the recognition of coincident outliers in, at least, 2 methods. The matching points of coarse errors among altimetry, gravity and Bouguer anomaly were grouped in 177 points, representing 2.45% of the database. These points were considered gross errors and were erased from the database. After cleaning the database, we focused in the preliminary interpretation of the Bouguer anomaly map of the RS, recognizing a direct association of the main regional geologic units with four well-defined geophysical domains. © 2012 Sociedade Brasileira de Geofísica. Source

Husemann R.,Av. Osvaldo Aranha | Eick E.,Av. Osvaldo Aranha | Majolo M.,Av. Osvaldo Aranha | Santos D.,Av. Osvaldo Aranha | And 4 more authors.
WebMedia 2010 - Anais de Artigos Completos do XVI Simposio Brasileiro de Sistemas Multimidia e Web | Year: 2010

This paper proposes a hybrid solution of hardware/software cooperation aiming efficient scalable H.264/SVC encoder implementation. Scalable solutions generate complex multi-layer streams, resulting in additional computational demands and latency delays when compared to single-layer alternatives, due to increased amount of resources needed to handle inherent inter-layer data dependency. In the proposal, a hardware FPGA board executes the high-demanding computational algorithms, while the software is responsible for external interface management and overall system control. Besides that, the paper suggests optimized hardware modules specially designed to improve the performance of critical algorithms, like DCT and Hadamard. Source

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