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Ontiveros J.M.H.,Research Center Cientfica | Ontiveros J.M.H.,Autonomous University of Baja California | Gonzalez E.I.,Research Center Cientfica | Gonzalez E.I.,Autonomous University of Baja California | And 8 more authors.
Ingenieria e Investigacion | Year: 2010

This work focused on the problem of finding a suitable medium access control protocol so that the nodes of a given cluster could communicate efficiently within their respective activity window. The nodes thus saved energy by turning off their transceivers during the time that they did not have to exchange information. This work's main objective was to ensure that the nodes were mainly focused on energy efficiency and delivering packages, taking quality of service (QoS) requirements into account and comparing their performance to an existing protocol called sensor medium access control (S-MAC). The parameters being compared were the time that the nodes were asleep, energy consumption and average delay. This work was completed by using the OPNET simulator tool (OPNET Modeler, version 11.5.A PL3, OPNET Technologies Company Inc). This approach greatly improved the "PCF + Sleep" performance proposed in this work over the earlier S-MAC.


Delgado-Gonzlez O.E.,University Autnoma Of Baja California | Jimnez J.A.,University of Barcelona | Espejel I.,University Autnoma Of Baja California | Ferman-Almada J.L.,University Autnoma Of Baja California | And 3 more authors.
Journal of Coastal Research | Year: 2011

Mexican coasts with aquaculture potential have been divided into 11 homogeneous coastal units (HCUs) based on zoning criteria related to economic activities, available infrastructure, population density, potential space availability, and exposure to hurricane impact in coastal municipalities. Data were obtained from the 2004 economic census, the 1990 population census, and the 2005 population count of Mexican coastal municipalities. Fishing occurs in all HCUs and employs the largest number of people among analyzed economic activities, followed by tourism (represented by the number of people working in hotels, motels, and similar establishments). Mining, particularly associated with petroleum, employs the third largest number of people; however, this activity is concentrated in the Gulf of Mexico. Aquaculture (primarily of shrimp) employs the smallest number of people among analyzed activities and is more prevalent on the Pacific coast. Based on criteria used to assess coastal space, Pacific coastal areas corresponding to HCUs located in northwestern Mexico and on the Yucatan coast, possess the most suitable natural conditions for aquaculture activity in sheltered coastal spaces. © 2011 Coastal Education & Research Foundation.


Sanchez-Gonzales S.,Autonomous University of Sinaloa | Ruiz-Campos G.,University Autnoma Of Baja California | De Lourdes Lozano-Vilano M.,Autonomous University of Nuevo León | Torres-Montoya E.H.,Autonomous University of Sinaloa | Herrera-Flores A.,Autonomous University of Sinaloa
Southwestern Naturalist | Year: 2010

We collected 12 mountain clingfish Gobiesox fluviatilis in the Ro Tamazula that represent the first record of the species in both the Ro Culiacn basin and the state of Sinaloa, Mexico. We compared proportions of body and counts of fin rays of the new specimens with those previously reported for this species.


Slama J.,Slovak University of Technology in Bratislava | Soka M.,Slovak University of Technology in Bratislava | Gruskova A.,Slovak University of Technology in Bratislava | Gonzalez A.,University Autnoma Of Baja California | Jancarik V.,Slovak University of Technology in Bratislava
Journal of Electrical Engineering | Year: 2011

The magnetic susceptibility shows a Hopkinson peak just below the Curie temperature TC when heating the selected hexagonal and spinel ferrite samples. It is proposed that this peak can be associated with a transition from stable magnetic state to super-paramagnetic relaxation above the blocking temperature up to the TC. The Hopkinson effect results are compared with SEM micrographs of both studied hexagonal and spinel ferrites. © 2011 FEI STU.


Alvarez-Borrego J.,CICESE | Martin-Atienza B.,University Autnoma Of Baja California
IEEE Transactions on Geoscience and Remote Sensing | Year: 2010

Relationships to obtain information concerning some statistical properties of sea-surface slope from statistical properties of the sea-surface intensities in remotely sensed images, considering an improved model with variable detector line-of-sight angle, are shown. A new expression between the variance of the intensity in the image and the variance of the surface slopes is derived. The association between correlation functions of the intensities in the image and surface slopes is numerically analyzed. A 1-D case is considered, and the results are presented graphically. © 2006 IEEE.


Carrillo I.,University Autnoma Of Baja California | Meza-Kubo V.,University Autnoma Of Baja California | Moran A.L.,University Autnoma Of Baja California | Galindo G.,University Autnoma Of Baja California | Garcia-Canseco E.,University Autnoma Of Baja California
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015

This paper proposes a neural network to identify pleasant and unpleasant emotions from recorded electroencephalography (EEG) signals, towards the construction of a method to assess user experience (UX). EEG signals were obtained with an Emotiv EEG device. The input data was recorded during the presentation of visual stimulus that induce emotions known a priori. The EEG signals recorded were preprocessed to enhance the differences and then used to train and validate a Patternet neural network. The results indicate that the neural network provides an accurate rate of 99.61% for 258 preprocessed signals. © Springer International Publishing Switzerland 2015.

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