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Leite G.,Instituto Federal Of Sergipe Ifs | De Jesus T.O.,Instituto Federal Of Alagoas Ifal | De Macedo D.D.J.,Federal University of Santa Catarina | Do Nascimento R.P.C.,Federal University of Sergipe
2016 8th Euro American Conference on Telematics and Information Systems, EATIS 2016 | Year: 2016

As a result of population growth in large cities face everyday problems related to urban mobility such as congestion, quality of urban roads and inefficiency of public transport. Intelligent transport systems initiatives act as an efficient solution to improve the functioning and performance of traffic systems, reducing congestion and increasing safety for citizens. However, due to the inclusion of different and distributed information sources on urban mobility, interoperability of the various technologies involved and the retention of these data are challenges that involve complex and costly efforts to governments and businesses. Thus, this article presents a proposal for georeferenced data retention architecture of Intelligent Transportation System in order to store this information georeferenced urban mobility in order to allow perform these activities more easily, and to promote interoperability between various applications. Therefore, the proposal was i9ITS architecture based on Service Oriented Architecture. It conducted a case study related to building an application that uses the i9ITS architecture for a taxi service company with real data. The use of this architecture proved to be effective and efficient to meet the proposed problem, as well as other possibilities to meet the demands and challenges related to Intelligent Transportation System. © 2016 IEEE.


Vieira D.C.L.,Instituto Federal Of Sergipe Ifs | Adeodato P.J.L.,Federal University of Pernambuco | Goncalves Jr. P.M.,Federal University of Pernambuco
Proceedings - 2013 12th International Conference on Machine Learning and Applications, ICMLA 2013 | Year: 2013

This paper proposes a new reinforcement learning algorithm called TD-GNG that uses the Growing Neural Gas (GNG) network to deal with environments of large domains. The proposed algorithm is capable to reduce the dimensionality of the problem by aggregating similar states. In experimental comparison against tile-coding in mountain car and puddle world, the TD-GNG showed an increase in the generalization without loosing quality in the policy obtained. © 2013 IEEE.


Vieira D.C.L.,Instituto Federal Of Sergipe Ifs | Adeodato P.J.L.,Federal University of Pernambuco | Goncalves Jr. P.M.,Instituto Federal Of Sergipe Ifs
Proceedings - International Conference on Tools with Artificial Intelligence, ICTAI | Year: 2013

The main issue when using reinforcement learning algorithms is how the estimation of the value function can be mapped into states. In very few cases it is possible to use tables but in the majority of cases, the number of states either can be too large to be kept into computer memory or it is computationally too expensive to visit all states. State aggregation models like the self-organizing maps have been used to make this possible by generalizing the input space and mapping the value functions into the states. This paper proposes a new algorithm called TD-GNG that uses the Growing Neural Gas (GNG) network to solve reinforcement learning problems by providing a way to map value functions into states. In experimental comparison against TD-AVQ and uniform discretization in three reinforcement problems, the TD-GNG showed improvements in three aspects, namely, 1) reduction of the dimensionality of the problem, 2) increase the generalization and 3) reduction of the convergence time. Experiments have also show that TD-GNG found a solution using less memory than TD-AVQ and uniform discretization without loosing quality in the policy obtained. © 2013 IEEE.


Menendez D.A.,Instituto Federal Of Sergipe Ifs | Menendez E.S.,Instituto Federal Of Sergipe Ifs | Sousa T.G.R.,Pontifical Catholic University of Rio Grande do Sul | Da Silva P.C.,Salvador University
Proceedings - 12th International Conference on Information Technology: New Generations, ITNG 2015 | Year: 2015

The process of software testing in agile environments presents complexity due to the need to be performed at short time intervals. Currently, there is no consensus in literature of the best approach to deploy agile testing. The testing management is often one of the hardest steps to be adapted to these methods, due to the short time for deliveries, which reduces the time available for testing, as a result, it is usually relegated to the background. In order to assess the viability and possible benefits in the implementation of an agile testing process, an exploratory research was made on the deployment approaches of agile testing, successfully used in different contexts and some of these approaches have been implemented in a software development company, which uses principles of agile methods. © 2015 IEEE.


Dos S. Rezende M.V.,Instituto Federal Of Sergipe | Montes P.J.R.,Instituto Federal Of Sergipe Ifs | Soares F.M.D.S.,Federal University of Sergipe | Santos C.D.,Federal University of Sergipe | Valerio M.E.G.,Federal University of Sergipe
Journal of Synchrotron Radiation | Year: 2014

Xerogels of strontium chlorate and aluminium chlorate doped with europium (un-co-doped) and co-doped with rare earth ions (Ln = Gd, Dy, Er and Y) were prepared using the proteic sol-gel route. Synchrotron radiation was used to investigate the effect of different co-dopants on the Eu3+ → Eu2+ reduction process during the synthesis of the samples. Samples were excited at the Eu L III-edge and the XANES regions were analyzed. The results suggest that some of the Eu ions can be stabilized in the divalent state and that it is difficult to completely reduce Eu3+ to Eu 2+ during thermal treatment. The mechanisms of the Eu reduction processes are explained by a proposed model based on the incorporation of charge-compensation defects.© 2014 International Union of Crystallography.


de Carvalho R.S.,Instituto Federal Of Sergipe Ifs | dos Santos Filho J.S.,Federal University of Sergipe | de Santana L.O.G.,Federal University of Sergipe | Gomes D.A.,Federal University of Sergipe | And 2 more authors.
Revista Ambiente e Agua | Year: 2013

The use of treated wastewater for agricultural purposes can be an alternative to maintaining the quality of water bodies and the biota of natural systems. It can also reduce the demand for water and preserve water supplies for more important uses. This study aimed to evaluate the effects of wastewater reuse in the microbiological quality of above ground parts of sunflower crops. The experiment was conducted from July to September 2012 in the greenhouse of the Department of Agricultural Engineering (DEA) at the Federal University of Sergipe, São Cristóvão Campus. Treated wastewater was collected at the Sewage Treatment Plant (WWTP) Rosa Elze, located in the municipality of São Cristóvão, SE. Irrigation was performed using different ratios of water and treated wastewater. The irrigation followed the FAO 56 method. We used a completely randomized design (CRD) with five treatments and four replicates per plot. The data were analyzed according to the parameters recommended by Resolution no. 12, 02/01/2001 of the Brazilian National Agency for Sanitary Vigilance. Coliforms, E. coli, yeast and mold, and Salmonella were counted. Results have shown that the microbiological quality of the superficial area of sunflower crops analyzed met the standards of Brazilian law. However, further studies should be conducted to investigate the effects of soil.


Montes P.J.R.,Instituto Federal Of Sergipe Ifs | Valerio M.E.G.,Federal University of Sergipe | Rezende M.V.D.S.,Instituto Federal Of Sergipe
Journal of Electron Spectroscopy and Related Phenomena | Year: 2013

Pure and rare earth doped SrAl2O4 and Ca 12Al14O33 have been synthesized by a new sol-gel proteic methodology. Photoluminescence (PL) and radioluminescence (RL) spectra show different behavior when excited with either UV light or X-ray radiation. Such behavior may be connected to the X-ray absorption/reduction of Eu ions process in samples. X-ray absorption spectroscopy (XAS) was carried out simultaneously with X-ray excited optical luminescence (XEOL) and the analysis indicates that are depends on the energy of excitation and the kind of excited species. Dispersive X-ray absorption spectroscopy (DXAS) was carried out to follow the kinetic of reduction process in the samples during the irradiation. The reduction process does not produce stable Eu2+ species. An overall analysis of the results makes possible to build the mechanisms of radioluminescence of rare earths doped SrAl2O4 and Ca 12Al14O33 systems. © 2013 Elsevier B.V. All rights reserved.


Rocha R.M.,Instituto Federal Of Sergipe Ifs | Lucas A.A.T.,Federal University of Sergipe | de Almeida C.A.P.,Federal University of Sergipe | Neto E.L.M.,Instituto Federal Of Sergipe Ifs | Aguiar Netto A.O.,Federal University of Sergipe
Revista Ambiente e Agua | Year: 2014

Watershed morphometric characterization is one of the most used procedures in hydrological and environmental analysis, with the purpose of understanding local and regional dynamics to support water resource management. This paper analyzed the morphometric variables of the Poxim-Açu River sub-basin, affluent of the Poxim River, which contributes with approximately 30% of the water supply of the capital of Sergipe. We used SRTM (Shuttle Radar Topography Mission) data for the Digital Elevation Model (DEM), with the scale of 1:250,000, provided by Embrapa Satellite Monitoring and the IBGE topographic chart SC-24-Z-B. Other data were obtained from the Digital Atlas of Water Resources of Sergipe, which were processed in Geographic Information Systems (GIS), as the QGIS 1.6 and ArcGIS 10.1 with Spatial Analyst and ArcHidro extensions. Results will support environmental studies of this watershed. We found that the sub-basin has an area of 128 km2, sinuosity index of 10%, fluvial hierarchy of the 4th order, and a compactness coefficient of 1.76. It is practically straight with an elongated shape and a low tendency to have peaks of floods.


Dias W.R.A.,Instituto Federal Of Sergipe Ifs | Moreno E.D.,Federal University of Sergipe
IEEE Latin America Transactions | Year: 2015

This paper presents a new code compression method where we merge the Huffman algorithm with the formation of patterns of blocks, which are found into the dictionary. We seek two consecutive blocks in two levels, one of them into compressed code and the other related to uncompressed code. We have used simulation with Simple Scalar and programs from MiBench. Our proposal has achieved a compression rate of 34.5% and 7% improvement in code compression when compared to the Huffman traditional method. © 2015 IEEE.


PubMed | Instituto Federal Of Sergipe Ifs, Federal University of Sergipe and Instituto Federal Of Sergipe
Type: Journal Article | Journal: Journal of synchrotron radiation | Year: 2013

Xerogels of strontium chlorate and aluminium chlorate doped with europium (un-co-doped) and co-doped with rare earth ions (Ln = Gd, Dy, Er and Y) were prepared using the proteic sol-gel route. Synchrotron radiation was used to investigate the effect of different co-dopants on the Eu(3+) Eu(2+) reduction process during the synthesis of the samples. Samples were excited at the Eu LIII-edge and the XANES regions were analyzed. The results suggest that some of the Eu ions can be stabilized in the divalent state and that it is difficult to completely reduce Eu(3+) to Eu(2+) during thermal treatment. The mechanisms of the Eu reduction processes are explained by a proposed model based on the incorporation of charge-compensation defects.

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