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Ciudad del Carmen, Mexico

Wakida-Kusunoki A.T.,Instituto Nacional Of Pesca | Amador-del-Angel L.E.,Autonomous University of Carmen
Aquatic Invasions | Year: 2011

Cyprinus carpio is known to be established in most of Mexico. Only the Mexican Gulf states were free of this species until recently. This paper reports the first record of the common carp in Tabasco, Mexico. Seven specimens of Cyprinus carpio var. communis and one specimen of Cyprinus carpio var. specularis were detected in a small scale fishing landing site near Frontera, Tabasco on January 24, 2011. Further sampling and monitoring is required to assess the ecological impacts of this exotic species on the native fauna. © 2011 The Author(s). Source

Moon I.,Chosun University | Anand A.,M. S. University of Baroda | Cruz M.,Autonomous University of Carmen | Javidi B.,University of Connecticut
IEEE Photonics Journal | Year: 2013

Malaria is one of the most widespread diseases, particularly in Asia and Africa. Correct diagnosis of malaria is necessary for its proper treatment. A compact automated tool for malaria identification will greatly benefit healthcare professionals in these regions. We propose a method that has the potential to automatically detect malaria-infected red blood cells (RBCs). This method combines the simplicity and robustness of lateral shearing interferometry with the flexibility of statistical methods to achieve the classification of diseased RBCs. Shearing interferograms generated using a glass plate in a common path setup were Fourier analyzed to retrieve the gradient phase and amplitude information of the cell. Then, multiple features based on the complex amplitude information of the cells are measured automatically and used to differentiate healthy and malaria-infected cells. Multivariate statistical inference algorithm of the experimental data shows that there is a difference between the populations of healthy and malaria-infected RBCs by using the measured RBC features. © 2009-2012 IEEE. Source

Rodriguez-Blanco M.A.,Autonomous University of Carmen | Claudio-Sanchez A.,CENIDET | Theilliol D.,University of Lorraine | Vela-Valdes L.G.,CENIDET | And 3 more authors.
IEEE Transactions on Industrial Electronics | Year: 2011

In this paper, a novel failure-detection technique and its analog circuit for insulated gate bipolar transistors (IGBTs), under open- and short-circuit failures, are proposed. This technique is applied to a three-phase induction-motor (IM) drive system. The detection technique is adapted to detect failures of short-circuit and open-circuit in the IGBT, which is based on gate-signal monitoring. The most important issue of this technique is the reduction of time for fault detection. This is very important in a failure-tolerant IM drive based on the material-redundancy approach or protection systems since the detection must be done before the device is damaged, in approximately less than 10 μ . The experimental test and simulations are presented in order to validate the proposed fault-detection technique, and it is validated, achieving replacement of the damaged element in the most suitable time. © 2010 IEEE. Source

Ruiz-Marin A.,Autonomous University of Carmen | Mendoza-Espinosa L.G.,Autonomous University of Baja California | Stephenson T.,Cranfield University
Bioresource Technology | Year: 2010

Two species of microalgae growing as immobilized and free-cells were compared to test its ability to remove N and P in batch cultures of urban wastewater. The best microalgae-cell growth configuration was selected to be tested in bioreactor operated in semi-continuous mode. Scenedesmus obliquus showed a higher N and P uptake rate in urban wastewater than Chlorella vulgaris. When tested in semi-continuous mode and with the re-calcification of beads, S. obliquus was more effective in removing N and P for longer periods (181 h) than batch cultures; fecal coliforms removal was good (95%) although the final concentration was still unsuitable for discharge to natural water bodies. Protein and lipids content analysis suggest that, from a practical point of view, immobilized systems could facilitate the separation of the biomass from the treated wastewater although in terms of nutritional value of the biomass, immobilized systems do not represent an advantage over free-cell systems. © 2009 Elsevier Ltd. All rights reserved. Source

Golikov V.,Autonomous University of Carmen | Lebedeva O.,Autonomous University of Carmen
IEEE Signal Processing Letters | Year: 2013

We design and assess an adaptive scheme to detect a subpixel target in a sequence of images in the presence of an additive correlated Gaussian background. The presence of the subpixel target decreases the background power that hence may be different under the null and alternative hypotheses. We use the generalized likelihood ratio test (GLRT) to adapt the recently proposed modified matched subspace detector (MMSD) to unknown background variances under the null and alternative hypotheses using the secondary and primary data, respectively. We derive a modified adaptive subspace detector (MASD) that is sensitive to both energy in the target subspace and reduced energy in the orthogonal subspace. We contrast it with the MMSD and the well-known adaptive cosine estimator (ACE). Numerical simulations attest to the validity of the theoretical analysis and show that the proposed detector performance outperforms the ACE, especially in the case of dark subpixel targets. The performance-degrading effects of limited secondary data are presented for the proposed detector. © 1994-2012 IEEE. Source

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