IEEE Latin America Transactions (Lat Am Trans IEEE )

Publisher: Institute of Electrical and Electronics Engineers. Region 9, Institute of Electrical and Electronics Engineers


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  • Website
    Latin America Transactions, IEEE website
  • Other titles
    Revista IEEE América Latina, Revista do IEEE América Latina, Revista del IEEE América Latina, IEEE Latinamerica transactions, IEEE Latin America transactions, Transactions IEEE Latin America
  • ISSN
  • OCLC
  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details

Institute of Electrical and Electronics Engineers

  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors own and employers publicly accessible webpages
    • Preprint - Must be removed upon publication of final version and replaced with either full citation to IEEE work with a Digital Object Identifier or link to article abstract in IEEE Xplore or Authors post-print
    • Preprint - Set-phrase must be added once submitted to IEEE for publication ("This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible")
    • Preprint - Set phrase must be added when accepted by IEEE for publication ("(c) 20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.")
    • Preprint - IEEE must be informed as to the electronic address of the pre-print
    • Postprint - Publisher copyright and source must be acknowledged (see above set statement)
    • Publisher's version/PDF cannot be used
    • Publisher copyright and source must be acknowledged
  • Classification
    ​ green

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents a theoretical study about quantum dot solar cells by means of numerical simulations, considering different doping levels in the intrinsic region of the cells, with the aim of evaluating the effect on the device's power conversion efficiency. Results of simulations performed over GaAs solar cells with InAs quantum dots, based on two different fabrication processes, are reported. The donor doping density in the intrinsic region was ranged from 1013 to 1017 cm-3. It is shown that, for a doping level of 7x1015 cm-3, the contribution of larger sized quantum dots to the photocurrent is increased by 50%, a very promising result in the search for new designs with higher efficiencies.
    IEEE Latin America Transactions 08/2014; 12(5):922-927.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The supervised machine learning has been showing very useful for the automatic visual inspection task. However, little has been considered about use traditional machine learning techniques on a domain where the classes are imbalanced. This problem corresponds to dealing with the situation where one class outnumbers the other. Traditional machine learning algorithms trained with imbalance datasets can be biased towards the majority class, thus producing poor predictive accuracy over the minority class. In this paper, we present different approaches to address the class imbalance problem and how these approaches have been used in the context of automatic visual inspection. The literature shows there are few works that consider the class imbalance problem on automatic visual inspection task and it shows that the one class classification technique is the most used.
    IEEE Latin America Transactions 06/2014; 12(4):657-667.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Light Detection and Ranging (LIDAR) provides high horizontal and vertical resolution of spatial data located in point cloud images, and is increasingly being used in a number of applications and disciplines, which have concentrated on the exploit and manipulation of the data using mainly its three dimensional nature. Bathymetric LIDAR systems and data are mainly focused to map depths in shallow and clear waters with a high degree of accuracy. Additionally, the backscattering produced by the different materials distributed over the bottom surface causes that the returned intensity signal contains important information about the reflection properties of these materials. Processing conveniently these values using a Simplified Radiative Transfer Model, allows the identification of different sea bottom types. This paper presents an original method for the classification of sea bottom by means of information processing extracted from the images generated through LIDAR data. The results are validated using a vector database containing benthic information derived by marine survey.
    IEEE Latin America Transactions 06/2014; 12(4):1-6.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The rising number of wireless devices has impacted directly on the interference and saturation levels of the ISM bands. Among the approaches proposed to minimize this problem is the use of use multiple orthogonal channels. In this context, a major challenge is to coordinate and grant channel access to the transmitting devices. A common strategy is to use a dedicated channel, also known as control channel, to select the nodes that shall communicate over the available data channels. In this work, we present a new contention mechanism, termed CRP (Collision Resolution Period), which was designed to assist in the contention resolution task. Compared with the IEEE 802.11 standard, the CRP has able to increase the aggregate throughput by over 300%. Also, a queuing theory model was used to evaluate the limits of the control channel utilization.
    IEEE Latin America Transactions 06/2014; 12(4):634-642.
  • IEEE Latin America Transactions 06/2014; 12(4).
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper the analysis of an electronic circuit for detecting faults in the IGBT based on measuring the gate signal is presented. The proposed circuit uses discrete analog and digital devices for future implementation on the side of the IGBT gate driver without introducing optocouplers or DACs. The purpose of this work is to design a simple and robust electronic circuit to detect failures early. Only the failures by short-circuit and open-circuit device are considered in this work. To achieve an early detection the IGBT gate signal behavior during turn-on transient is used and to achieve the robustness an adaptive threshold is added. Finally all stages of the general scheme for detection and identification of faults are simplified to obtain a compact electronic circuit and the results are validated with PSpice software using real components exclusively.
    IEEE Latin America Transactions 05/2014; 12(3):402-409.
  • IEEE Latin America Transactions 05/2014; 12(3):430-435.
  • IEEE Latin America Transactions 05/2014; 12(3):473.