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Oliveira M.D.S.,Institute Federal Of Educacao | Feddern V.,Embrapa Suinos e Aves | Kupski L.,Grande Rio University | Cipolatti E.P.,Grande Rio University | And 2 more authors.
Bioresource Technology | Year: 2011

The aim of this study was to evaluate fermented rice bran phospholipids, lipids and fatty acid content in a fermentation solid system with Rhizopus oryzae fungus. For this, aliquots were withdrawn every 24. h over 120. h. The content of phospholipids was determined by colorimetric method. Esterified fatty acids were separated by gas chromatography, then identified and quantified. The total lipids from fermented rice bran (FB) decreased from 20.4% to 11.2% in the range between 0. h and 120. h of fermentation while phospholipid contents were increased up to 2.4mgPglipid-1. In fermented bran, oleic, palmitic and linoleic acids prevailed, with a decrease in saturated fatty acids (20%) and increase in the unsaturated ones (5%). This study showed that rice bran fermentation with R. oryzae can be applied to the production of phospholipids altering the saturated to unsaturated fatty acid ratio. © 2011 Elsevier Ltd.


De Camargos A.F.P.,University of Sao Paulo | De Camargos A.F.P.,Institute Federal Of Educacao | Silva V.C.,University of Sao Paulo | Guichon J.-M.,CNRS Grenoble Electrical Engineering Lab | Munier G.,CNRS Grenoble Electrical Engineering Lab
IEEE Transactions on Magnetics | Year: 2014

We present a performance analysis of a parallel implementation of preconditioned conjugate gradient solvers using graphic processing units with compute unified device architecture programming model. The solvers were optimized for the solution of sparse systems of equations arising from finite-element analysis of electromagnetic phenomena involved in the diffusion of underground currents in both steady state and under time-harmonic current excitation. We used both shifted incomplete Cholesky factorization and incomplete LU factorization as preconditioners. The results show a significant speedup using the graphics processing unit compared with a serial CPU implementation. © 1965-2012 IEEE.


Dos Santos B.A.,University of Campinas | Campagnol P.C.B.,Institute Federal Of Educacao | da Cruz A.G.,Federal University of Rio de Janeiro | Morgano M.A.,Institute Of Tecnologia Of Alimentos | And 2 more authors.
Journal of Food Science | Year: 2015

The NaCl levels in dry fermented sausages were reduced by 50% or were substituted with KCl, CaCl2, or a blend of KCl and CaCl2 (1:1). The quality, safety, and the potential consumer market of dry fermented sausages were assessed. Neither 50% reduction of the NaCl content nor the substitution of 50% of the NaCl with KCl influenced the fermentation and maturation process. However, when CaCl2 was used as the substitute salt (50%), there was a significant decrease in pH, an increase in the water activity, and a decrease in lactic acid and micrococcus bacterial counts. Overall, the sensory acceptance decreased in dry fermented sausages with reduced sodium content. However, cluster analysis and internal preference mapping revealed potential for commercialization of samples with 50% of the NaCl content substituted with KCl or with a mixture of KCl and CaCl2 (1:1). © 2015 Institute of Food Technologists®.


PubMed | Federal University of Santa Maria, Federal University of Rio de Janeiro, Institute Of Tecnologia Of Alimentos, University of Campinas and Institute Federal Of Educacao
Type: Journal Article | Journal: Journal of food science | Year: 2015

The NaCl levels in dry fermented sausages were reduced by 50% or were substituted with KCl, CaCl2 , or a blend of KCl and CaCl2 (1:1). The quality, safety, and the potential consumer market of dry fermented sausages were assessed. Neither 50% reduction of the NaCl content nor the substitution of 50% of the NaCl with KCl influenced the fermentation and maturation process. However, when CaCl2 was used as the substitute salt (50%), there was a significant decrease in pH, an increase in the water activity, and a decrease in lactic acid and micrococcus bacterial counts. Overall, the sensory acceptance decreased in dry fermented sausages with reduced sodium content. However, cluster analysis and internal preference mapping revealed potential for commercialization of samples with 50% of the NaCl content substituted with KCl or with a mixture of KCl and CaCl2 (1:1).


Lo T.B.,Institute Federal Of Educacao | Kastensmidt F.L.,Federal University of Rio Grande do Sul | Beck A.C.S.,Federal University of Rio Grande do Sul
Proceedings - IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems | Year: 2014

As the semiconductor technology advances, transistor size decreases and become more susceptible to upsets. In certain fields, such as space applications, multiple faults may occur at the same time. Traditional fault-tolerance techniques, such as N-Modular Redundancy (NMR) with majority voters, have been used to increase system reliability. Voters can be classified as Bit- and Word-Voters. Bit-Voters perform a bit by bit comparison, which is the most basic, simple and quick voting scheme. Word-Voters are more expensive to implement in hardware, but consider all bits in parallel to determine the final output, which increases data integrity. This paper proposes putting together the advantages of both voters by the use of an adaptable voter, which uses a voter function to group voters in sets of bits. We will explore this design space by considering multiple errors and project restrictions such as maximum error rate, number of modules, and probability of corrupt outputs, showing that in some cases the adaptable voter is better than the bit- and word-voters. © 2014 IEEE.


Bucci M.M.H.S.,Federal University of Juiz de fora | da Fonseca Delgado Francisco F.E.,Institute Federal Of Educacao | da Silva Santos C.,Institute Federal Of Educacao | de Oliveira L.F.C.,Federal University of Juiz de fora
Revista Ambiente e Agua | Year: 2015

The Dr. John Penido Dam is the main source of water supply of the city of Juiz de Fora, located in southeastern Brazil. This study analyzed metals, agro toxics, and some physico-chemical and microbiological parameters in water samples taken near the dam, and checked their conformity to limits specified in the pertinent legislation (Brasil, 2004; 2011; CONAMA, 2005). Eight samples were collected at five points of the reservoir between July 2011 and March 2013. The following physicochemical and microbiological parameters were analyzed: water temperature, dissolved oxygen, pH, conductivity, color, turbidity, total solids, demand biochemical oxygen, nitrate, nitrite, ammonia, total nitrogen, total phosphorus, chlorophyll a, total and thermo-tolerant coliforms. Every agro toxic mentioned in Ordinances MS/GM 518/2005 and 2.914/2011 of the Ministry of Health (Brazil, 2004; 2011) was analyzed. The total and dissolved metals tested included: copper, chromium, cadmium, lead, nickel, zinc, manganese, iron, sodium, potassium and calcium. The correlation between the results was accomplished using data mining technique (Data Mining). The results showed that the levels of metals in the water are below the CONAMA parameters, with exceptions of iron and zinc. The following other parameters also showed disagreement: biochemical oxygen demand, dissolved oxygen, total phosphorus and thermo-tolerant coliforms. Agro toxics were also below the limits of quantification of the methods employed, and were therefore within the limits established by the Ministry of Health Ordinances. The results and correlations indicate that the weathering, runoff and forms of use and occupation of the watershed interfere with the aquatic ecosystem. This study provides information useful to planning the preservation and restoration of the water quality of the supply source. © 2015, Institute for Environmental Research in Hydrographic Basins (IPABHi). All rights reserved.


Paula Jr. I.C.,Federal University of Ceará | Medeiros F.N.S.,Federal University of Ceará | Bezerra F.N.,Institute Federal Of Educacao | Ushizima D.M.,Lawrence Berkeley National Laboratory
Journal of Mathematical Imaging and Vision | Year: 2013

This paper presents a multiscale corner detection method in planar shapes, which applies an undecimated Mexican hat wavelet decomposition of the angulation signal to identify significant points on a shape contour. The advantage of using this wavelet is that it is well suited for detecting singularities as corners and contours due to its excellent selectivity in position. Thus, this wavelet plays an important role in our approach because it identifies changes in non-stationary angulation signals, and it can be extended to multidimensional approaches in an efficient way when approximating this wavelet by difference of Gaussians. The proposed algorithm detects peaks on a correlation signal which is generated from different wavelet scales and retains relevant points on the decomposed angulation signal while discards poor information. Our approach assumes that only peaks which persist through several scales correspond to corners. Furthermore, we introduce a novel procedure to tune parameters for the corner detection algorithms that corresponds to the best relation between Precision and Recall measures. This technique guides the parameter adjustment of the algorithms according to the image database and it improves their performance with regard to true corner detection. Concerning the performance assessment of the algorithms, we compare the proposed one to other corner detectors by using Precision and Recall measures which are based on ground-truth information. Tests were carried out using more than a hundred images from a non-homogenous database that contains noisy and non-noisy binary shapes. © Springer Science+Business Media, LLC 2012.


Paula Jr. I.C.,Federal University of Ceará | Medeiros F.N.S.,Federal University of Ceará | Bezerra F.N.,Institute Federal Of Educacao
2013 18th International Conference on Digital Signal Processing, DSP 2013 | Year: 2013

Efficacious retrieval of similar shapes from large image databases is still a challenging problem. In recent works about shape retrieval, methods based on Dynamic Space Warping (DSW) and descriptors with contour information have had a significant presence. This paper introduces a technique for Content-Based Image Retrieval (CBIR) that encompasses a robust corner detector and a new shape descriptor based on local and global features invariant to translation, rotation and scale. Moreover, this technique employs the effective DSW tool for shape matching and retrieval. We have conducted our experiments on binary images from MPEG-7 and Tari 1000 databases and our experiments have shown that the proposed method performed well in comparison with other methods defined by salience points and triangle-area representation. © 2013 IEEE.


Dias L.L.,Institute Federal Of Educacao | Da Veiga Machado A.F.,Institute Federal Of Educacao | De Paulo L.M.,Institute Federal Of Educacao | De Alvarenga E.R.Q.,Institute Federal Of Educacao
15th International Conference on Intelligent Games and Simulation, GAME-ON 2014 | Year: 2014

On this paper, it is proposed a "syllabus" of simple and conventional activities that can aid children to become competent computer programmers with ease. Activities such that can be developed with the children to train the logical- mathematical way of thinking, preparing them not only to choose a major on the field of Information Technology, but, through the organization of thought process, to develop capabilities such as deduction, induction and dialectics of the professionals of the future. The goal of this paper is to gradually develop common activities focusing on both short and long-term progress, such as swimming classes, music, painting and even through toys and games to develop the potential abilities on children. © 2014 EUROSIS-ETI.


PubMed | Federal University of Pelotas and Institute Federal Of Educacao
Type: Journal Article | Journal: Journal of food science | Year: 2016

Soybean is a rich source of bioactive compounds, such as phenolic acids, flavonoids, isoflavones, carotenoids, and tocopherols. The amount of bioactive compounds in freshly harvested soybeans and their derived products has been determined; however, when they are used in the food industry, soybeans are generally stored prior to being processed. This study aimed to evaluate the effects of soybean moisture content (12%, 15%, and 18%) and storage temperature (11, 18, 25, and 32 C) on the free phenolic, total flavonoid, vanillic acid, total carotenoid, and - and -tocopherol content of soybeans stored for 12 mo. Moreover, the ABTS and DPPH radical scavenging activities of phenolic extracts were determined. There was an increase in free phenolics and total flavonoids in the stored grains compared with the grains on the 1st d of storage. Vanillic acid showed a decrease in soybeans stored at 15% and 18% moisture content and 25 or 32 C, which indicated some degradation into other metabolites. Total carotenoid content decreased as a function of storage temperature and showed some temperature-dependent degradation. The - and -tocopherol content also tended to decrease in grains stored at 15% or 18% moisture content or 25 or 32 C, regardless of the moisture content studied.

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