A. Álvarez-Meza, D. Cárdenas-Peña, G. Castellanos-Domínguez
{"title":"MRI discrimination by inter-slice similarities and kernel-based centered alignment","authors":"A. Álvarez-Meza, D. Cárdenas-Peña, G. Castellanos-Domínguez","doi":"10.1109/IWOBI.2014.6913955","DOIUrl":"https://doi.org/10.1109/IWOBI.2014.6913955","url":null,"abstract":"Brain structure segmentation from 3D magnetic resonances image (MRI) allows supporting the analysis of physiological and pathological processes. Nonetheless, finding MRI relationships posses a challenge when analyzing in voxel-based high-dimensional spaces. We introduce a kernel-based representation approach to support MRI discrimination. In this sense, inherent Inter-Slice Kernel (ISK) relationship is employed to highlight brain structure distributions. Then, a generalized Euclidean metric is estimated by using a kernel-based centered alignment algorithm to code the correlation between MRI dependencies and prior demographic patient information. The proposed approach is tested on MRI data classification by considering patient gender and age categories. Attained results show how proposed methodology improves data interpretability and separability in comparison to state of the art algorithms based on MRI Voxel-wise features. Therefore, introduced kernel-based representation can be useful to support MRI clustering and similarity inference tasks that are required on template-based image segmentation and atlas construction.","PeriodicalId":433659,"journal":{"name":"3rd IEEE International Work-Conference on Bioinspired Intelligence","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115193436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. M. Luna-Rivera, R. Pérez-Jiménez, J. Rabadan-Borjes, J. Rufo-Torres, V. Guerra, C. Suarez-Rodriguez
{"title":"Multiuser scheme for indoor visible light communications using RGB LEDs","authors":"J. M. Luna-Rivera, R. Pérez-Jiménez, J. Rabadan-Borjes, J. Rufo-Torres, V. Guerra, C. Suarez-Rodriguez","doi":"10.1109/IWOBI.2014.6913949","DOIUrl":"https://doi.org/10.1109/IWOBI.2014.6913949","url":null,"abstract":"In recent years, the rapid growth of visible light communications (VLC) is driven the interest into new applications of this technology. While single-user VLC systems are widely studied in the literature, less attention is given to multiuser scenarios which are likely to be deployed. Thus, this paper studies a new low-complexity multiuser structure for indoor VLC systems using RGB channels. In this scheme, a time-based approach is employed to separate the users' signals which is combined with a three-dimensional signal constellation design to enhance the throughput on each user. The uncomplicated architecture of this multiuser system proves to be effective and appealing for low-cost implementations such as wireless sensor networks. Numerical simulations are carried out to evaluate the performance of the proposed scheme.","PeriodicalId":433659,"journal":{"name":"3rd IEEE International Work-Conference on Bioinspired Intelligence","volume":"129 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130031319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Discrimination of contaminated fish responses by fractal dimension and entropy algorithms","authors":"H. Eguiraun, Iciar Martinez, K. Lopez-de-Ipina","doi":"10.1109/IWOBI.2014.6913959","DOIUrl":"https://doi.org/10.1109/IWOBI.2014.6913959","url":null,"abstract":"The aim of the work was to develop a non-invasive methodology for image acquisition, processing and nonlinear trajectory analysis of the center of the fish group as a response to a stochastic event. Object detection and motion estimation were performed by an optical flow algorithm. The Fractal Dimension (FD) and the Entropy of the trajectory followed by the centroids of the groups of fish were calculated using Katz, Higuchi and Katz-Castiglionís FD and the Shannon Entropy algorithms respectively. The methodology was tested on three single cases European sea bass, two of which were similar (C1 control and C2 tagged fish) and very different from the third (C3, tagged fish in methylmercury contaminated water). Katz-Castiglioni and Shannon entropy were the most sensitive algorithms and proved to be promising tools for the non-invasive identification and quantification of differences in fish responses.","PeriodicalId":433659,"journal":{"name":"3rd IEEE International Work-Conference on Bioinspired Intelligence","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133554055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A multi-(users, carriers, antennas) IDMA receiver: A way to address the bandwidth scarcity issue","authors":"Héctor Poveda, G. Ferré, É. Grivel","doi":"10.1109/IWOBI.2014.6913951","DOIUrl":"https://doi.org/10.1109/IWOBI.2014.6913951","url":null,"abstract":"This paper deals with a system combining orthogonal frequency division multiplexing (OFDM), interleave-division multiple access (IDMA) and space time block coding (STBC). Less investigated in the literature than multicarrier code division multiple access or OFDMA, OFDM-IDMA can be viewed as a promising technique to solve the problem of bandwidth scarcity. With a specific frame organization to estimate the carrier frequency offsets (CFO) and the channels, we suggest a new receiver architecture. Indeed, based on a modification of the standard IDMA receiver where a CFO correction is no longer necessary unlike common OFDM approaches, we show that the transmitted bits can be still recovered. When considering a STBC-OFDM-IDMA uplink system over different Rayleigh channels, simulation results show the efficiency of the proposed algorithm. These results confirm the utility of this technique as a mid-term solution to solve the constant increase of data rate and user density per cell in cellular systems.","PeriodicalId":433659,"journal":{"name":"3rd IEEE International Work-Conference on Bioinspired Intelligence","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115781077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ad-hoc network implementation and experimental testing using low cost and COTS components: An ecuatorian case study","authors":"Patricia Chavez-Burbano, Ignacio Marin-Garcia, Andrés Munoz-Arcentales","doi":"10.1109/IWOBI.2014.6913952","DOIUrl":"https://doi.org/10.1109/IWOBI.2014.6913952","url":null,"abstract":"In developing countries like Ecuador, the farmers don't have access to the technology needed to increase field production or reduce the water and energy waste typical of old farming methods. This paper presents the implementation of a low cost smart irrigation system that uses a modified wireless sensor network to provide the technology tools to those farmers in developing countries willing to change their method of production. Most of the system parts were designed, manufactured and integrated with low and local components minimizing the use of expensive imported parts in order to reduce the implementation cost and create new work opportunities. This project was focused in the substitution of components, hardware integration, protocol selection and modification, design for easy and non-specialized worker assembly.","PeriodicalId":433659,"journal":{"name":"3rd IEEE International Work-Conference on Bioinspired Intelligence","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129678616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Emotional temperature","authors":"J. B. Alonso, Josue Cabrera, C. Travieso","doi":"10.1109/iwobi.2014.6913933","DOIUrl":"https://doi.org/10.1109/iwobi.2014.6913933","url":null,"abstract":"Automatic emotional state recognition from the speech signal represents a remarkable improvement in human-machine interfaces and it opens up a wide range of new applications. This turns out to be no trivial task due to the degree of difficulty inherent in the study of emotions. Traditional methods of emotional discrimination use prosodic and paralinguistic features, which are determined by a linguistic segmentation of the locution. This type of segmentation results in almost real scenarios impossible to estimate. In this paper a simple and effective method of automatic discrimination between positive and negative emotional intensity speech is presented. This work proposes a new strategy based on a few features set obtained from a temporal segmentation of the speech signal. This strategy is robust, offers low computational cost and improves the performance of a segmentation based on linguistic aspects.","PeriodicalId":433659,"journal":{"name":"3rd IEEE International Work-Conference on Bioinspired Intelligence","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122101790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}