IEEE Latin America Transactions (Lat Am Trans IEEE )

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

Description

  • Impact factor
    0.22
  • 5-year impact
    0.00
  • Cited half-life
    2.90
  • Immediacy index
    0.07
  • Eigenfactor
    0.00
  • Article influence
    0.00
  • 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
    1548-0992
  • OCLC
    53988421
  • 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: Worldwide, dozens of initiatives are under way to redesign the Internet, aiming to better meet information society needs in the next decades. These efforts are collectively called “future Internet” research. Meanwhile, in the scope of wireless digital communication systems, the research advances to increase radiofrequency spectrum utilization, as well as to create platforms that facilitate migration to new technologies and protocols. The new generation wireless terminals should learn from the radio environment, selecting the best communication channels available and avoiding interference with licensed users. These terminals are called “cognitive radio”. In this paper, technologies from both fronts are integrated to create a reference model where the cognitive radio is merged with the wireless terminal requirements of the future Internet. The paper presents and analyzes the previous work related to the proposed reference model, qualitatively comparing several efforts with this one, in order to determine the benefits of the adopted synergistic approach.
    IEEE Latin America Transactions 02/2014; 12(2):342-363.
  • [show abstract] [hide abstract]
    ABSTRACT: This paper presents an analysis of parametric multimodal image registration method based on particle filtering. We illustrate that this methodology offers high performance over traditional approaches based on gradient descendent optimization of the mutual information. The evaluation was performed with a set of medical images, and the tests include evaluations under different noise conditions and partial data, and a comparison with a state of the art technique. Additionally, the method was improved by using an extended model in the stochastic search. Finally, a multithreads implementation by multi-core processing was developed that reduced the computational time in the registration task. According to the evaluation, the parametric registration based on particle filtering shows accuracy, robustness and high computational speed in the parameters estimation of multimodal image registration, and it could be considered as an efficient tool in medical imaging applications.
    IEEE Latin America Transactions 02/2014; 12(2):129-137.
  • [show abstract] [hide abstract]
    ABSTRACT: This article proposes a new architecture for intelligent pressure sensors based on the interconnection of a Digital Signal Processor (DSP) and a microcontroller. This configuration allows to obtain a highly accurate output using a reduced number of electronic components. Additionally, very low response times are obtained and different protocols for digital communication are implemented. This paper also discusses the compensation algorithm used to correct the sensitivity and offset dependence on temperature, as well as non-linearity of the pressure sensor response. Hardware and tests performed to verify the proposed architecture operation are described. The total error band obtained in the digital output was 0.07% of full scale output for a relative pressure sensor in a temperature range of 0 to 50 ??C. The obtained results demonstrate the advantages of the new architecture proposed.
    IEEE Latin America Transactions 01/2014; 12(2):116-121.
  • [show abstract] [hide abstract]
    ABSTRACT: The occurrence of blackouts in recent years and their impact on society call into question the traditional planning and reliability analysis, which focuses on events of significant chances, without explicitly considering the development of catastrophic situations such as blackouts. The complexity theory provides concepts widely applied in other areas, such as economics and science, opening a new field of study in electrical systems. This would provide complementary tools to traditional analysis, helping explaining, quantifying and modeling events with very low probability and high impact for society, such as blackouts and cascading failures. These new concepts are applied to characterize the Bolivian power system, marking the first application to a Latin American system. Results are surprising because of its failure behavior is consistent with a ??power law??, suggesting a complex system, characterized by self-organized criticality (SOC) with long-term memory, where small perturbations can propagate out producing blackouts. This suggests that this theory would be appropriate not only to describe giant systems such as those from China and the U.S., but also for smaller systems, such as the Bolivian and other Latin American ones. It was shown that blackouts provide significant risks that would require explicit modeling and risk management.
    IEEE Latin America Transactions 01/2014; 12(2):146-152.
  • [show abstract] [hide abstract]
    ABSTRACT: This paper describes some metrics to consider for web application development with frameworks like Google Web Toolkit and Google App Engine, technologies with a particular mode of operation and with some restrictions that affect the design and the functionality of these applications, but also offer great benefits such as improved user interface, better usability, improved performance, greater scalability and as the ability to use certain services, which allow application interoperability with different systems.
    IEEE Latin America Transactions 01/2014; 12(2):372-377.
  • [show abstract] [hide abstract]
    ABSTRACT: One of the major problems of voltage stability is the reactive power limit of the system. Improving the system's reactive power handling capacity via Flexible AC transmission System (FACTS) devices is a solution for prevention of voltage instability. In this paper it is studied the influence of Static Synchronous Compensators (STATCOM) and Static Var Compensators (SVC) in dynamic Voltage Stability during Low Voltage Ride Through (LVRT), in wind farms. The wind turbines are equipped with pitch control coupled with a Fixed Speed Induction Generator (FSIG). Due to the nature of asynchronous operation, system voltage instability of wind farms based on FSIG is largely caused by the excessive reactive power absorption by FSIG after a fault due to the large rotor slip gained during fault. Wind farm models based on FSIG and equipped with either STATCOM or SVC are developed in EUROSTAG. The Automatic Voltage Regulators (AVR) of the generating units and the turbine speed governors were modeled in detail. Different load models were used and the Under Load Tap Changers (ULTC) were also taken into account. Finally, some conclusions that provide a better understanding of the dynamic voltage stability of a system with FSIG model during LVRT, using various capacities of STATCOM and SVC are pointed out.
    IEEE Latin America Transactions 01/2014; 12(2):138-145.
  • [show abstract] [hide abstract]
    ABSTRACT: This work presents a proposal for a particle system created on Nvidia's CUDA platform. The proposed system was built on a modular project and implements fluid simulation through the Discrete Element Method and N-Body gravitational simulation. In order to improve the system's performance three acceleration structures were implemented: uniform grid, octree and kd-tree. A quantitative analysis of the execution performance of both simulators demonstrated a performance improvement due to the use of the acceleration structures.
    IEEE Latin America Transactions 01/2014; 12(2):321-329.
  • [show abstract] [hide abstract]
    ABSTRACT: The graphical user interface becomes an important element in simulation systems. The problem in this type of systems is that there is plenty of information in the environment that is not provided in the best way to the user. This information can be provided through mechanisms of awareness. However, how to incorporate these mechanisms to the graphical interface of a traffic system is not easy. This paper proposes a method that allows graphical interfaces designers to incorporate awareness mechanisms in driving simulation environments. This method allows engineers to design usable interfaces that simulate reality more adequately.
    IEEE Latin America Transactions 01/2014; 12(1):36-41.
  • [show abstract] [hide abstract]
    ABSTRACT: This paper presents a solution for the inverse kinematics in a human arm kinematics model of seven degrees of freedom applying Genetic Algorithms in the shoulder joint and the Piper method in the whole arm in order to make the algorithm response faster and accurate. The Genetic Algorithm's code explores a set of initial solutions and optimizing it until find an angular answer that satisfies the positional and rotational restrictions proposed to the model with a minimal error and a considerably speed. The accuracy and reliability of the applied algorithm is evaluated applying a statistical analysis upon a set of answers using SPSS Statistics
    IEEE Latin America Transactions 01/2014; 12(2):212-218.
  • [show abstract] [hide abstract]
    ABSTRACT: Based on a User Centered Design (UCD) approach, this paper describes the design and first validation process of a systemic model and a paper prototype for a mobile tool to support health data registering, related to physiotherapy of institutionalized frail elderly in nursing homes in the Chilean Patagonia. Given the lack of geriatricians and caregivers in the area, the goal is to optimize time and support integrated care, through making available a set of specific information for the health team, which would allow monitoring the patient's evolution in a timely and effectively manner. The design process led to define user profiles, content and a functional specification set. A field study and rapid contextual design instruments were used to validate the model for this context, so as the first pre-functional prototype to be developed in a next stage
    IEEE Latin America Transactions 01/2014; 12(1):54-61.
  • [show abstract] [hide abstract]
    ABSTRACT: Nowadays, the electric power supply to rural facilities is commonly composed by single-phase medium voltage grids. Eventually, some of these rural facilities require the use of more significant driving loads, making necessary the replacing of the single-phase networks by a new medium voltage three-phase network. Thus, despite the fact it is a new or an existing facility, the construction costs related to a new medium voltage three-phase grid, which may have some miles long, could cripple investment to be made by the farmer as well as increase utility tariffs due to higher costs of the three-phase distribution networks in rural areas. In this context, this paper presents an innovative and low cost power supply to attend three-phase rural facilities through a new two-wire distribution system.
    IEEE Latin America Transactions 01/2014; 12(2):182-189.
  • [show abstract] [hide abstract]
    ABSTRACT: This article reflects upon the use of semiotic engineering in in- teraction design processes. The role of semiotics in HCI has been extensively explored and evaluation methods have been developed to facilitate the pragmatic application of semiotics to human-computer interaction. These methods can be ap- plied in both formative and summative evaluation strategies and, especially when used in for formative evaluation pur- poses, they adequately feed back into the design process. However, with the growing emphasis on co-design, we see the need of supporting the design process with a frame of reference informed by the semiotic principles, thus shifting the contribution of semiotics to interaction design i.e. from an evaluation standpoint to a design decision role. We build upon a case study to explore the interplay between the semi- otic inspection method and the interaction design process laying the ground for future work in this direction.
    IEEE Latin America Transactions 01/2014; 12(1):48-53.
  • [show abstract] [hide abstract]
    ABSTRACT: digital comparative holography is a commonly used method for checking the body or contortion of two corresponding entities with diverse micro architecture. Spatial Light Modulator (SLM) is deployed for illumination of the entity with the master entity's mask; In addition to this, test entity misalignments can be fixed thoroughly. It is also critical to investigate the deformation of entities through SLM. The chaos theory is a complex and important mathematical theory that addresses the impact of seemingly insignificant factors. The chaos theory name is derived from the idea that the theory can bring about a definition for chaotic or random processes. In this paper a novel approach has been taken in such a way that the phenomenon of optical vignetting is precisely demonstrated and explained by the conditions together with criteria's of chaos theory.
    IEEE Latin America Transactions 01/2014; 12(2):244-247.
  • [show abstract] [hide abstract]
    ABSTRACT: This work presents the main steps towards a parallel version of the PIC (Particle In Cell) code XPDP1 (X Plasma Device Planar 1-Dimensional), which uses a Monte Carlo procedure to treat collisions among the particles of different species of neutral and ionized pure gases such as argon, oxygen and others. The graphical interface of XPDP1 has been removed and it was parallelized by means of a hybrid approach, with message-passing for distributed memory (using MPI) and shared memory (using OpenMP). The tests for the efficiency and speedup were carried out on a hybrid homogeneous cluster and the results obtained show speedups of approximately ten for 32 cores on 4 servers, which allows the use of this code on problems which are infeasible with the serial version.
    IEEE Latin America Transactions 01/2014; 12(2):122-128.
  • [show abstract] [hide abstract]
    ABSTRACT: In the scope of Services Science, Management and Engineering (SSME), Service Level Agreements (SLAs) are technical documents that contain the conditions that must be fulfilled during the provision and consumption of services. Typically, the violation of the terms specified in the SLA leads to consequences for the stakeholders involved in the agreement. It is therefore important to assure that the Service Based Application (SBA) behaves as expected in order to avoid such consequences. In this context, the testing of SLAs is a challenging and promising area but requires a high cost in terms of effort to design the tests. Hence, it is convenient to automate as much as possible the tasks involved in the generation of the tests. To address this issue, we have designed and implemented SLACT (SLA Combinatorial Testing) tool, which takes the specification of a SLA as the test basis. SLACT automates the generation of tests by means of applying different combinatorial testing techniques. Furthermore, SLACT is able to automatically identify a set of constraints that avoid the obtaining of non-feasible tests by analyzing the information contained in the SLA guarantee terms. We have used SLACT to obtain the tests for a critical eHealth scenario, proposed in the context of a FP7 European Project.
    IEEE Latin America Transactions 01/2014; 12(2):256-261.
  • [show abstract] [hide abstract]
    ABSTRACT: Today the amount of web applications has grown exponentially and the number of both novice and experienced users decided to experiment with these applications has increased. However, there has been a large increase in problems when the user interacts with those applications. Therefore, a study was made in order to ensure the quality of web applications. To achieve this, a usability methodology for transactional web applications was applied first, where a considerable number of problems identified by Nielsen principles were found and we applied the communicability methods SIM (Semiotic Inspection Method) and CEM (Communicability Assessment Method). During this research two web applications were tested, we found out that there is an association with usability problems, where the 68% to 72% of these problems are about communicability, which turn to be the most serious problems. This shows how difficult is for the designer to interact with the user and vice versa.
    IEEE Latin America Transactions 01/2014; 12(1):23-28.

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