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Electronics, Robotics and Automotive Mechanics Conference, 2008. CERMA '08

Date Sept. 30 2008-Oct. 3 2008

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Displaying Results 1 - 25 of 112
  • [Front cover]

    Page(s): C1
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  • [Title page i]

    Page(s): i
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  • [Title page iii]

    Page(s): iii
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  • [Copyright notice]

    Page(s): iv
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  • Table of contents

    Page(s): v - xii
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  • Message from General Chair

    Page(s): xiii
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  • Committee

    Page(s): xiv - xv
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  • list-reviewer

    Page(s): xvi - xx
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  • Sponsors

    Page(s): xxi
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  • Electrical Transport and Impedance Analysis of Au/Porous Silicon Thin Films

    Page(s): 3 - 7
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (162 KB) |  | HTML iconHTML  

    In order to obtain electronic devices based on PS/p-Si structure, we present a study the AC conductivity and Thermo-electrical behavior of Porous Silicon (PS) layers prepared by electrochemical etching in p-type silicon (p-Si) <100>substrates. The beginning is obtaining good electrical contacts on porous layer; for this reason, several Au/PS/Au junctions were electrically characterized to understand the transport mechanisms in porous surface and the temperature dependence in the porous properties studied, also the resistance-temperature characteristic of PS/p-Si thermistor device. Finally, we obtained the AC conductivity in modulo and phase; an electrical equivalent circuit was proposed to fit the experimental frequency response of the different samples. View full abstract»

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  • A Switching Capacitor CMOS Based Device for Hands-Free Electrolarynx Activation Using Electromyographic Signals

    Page(s): 8 - 13
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (273 KB) |  | HTML iconHTML  

    Handheld electrolarynx is a popular device used to produce voice by laryngectomized patients. A switching capacitor CMOS based device for hands free electrolarynx activation using electromyographic signals, is proposed. The prototype intends to give laryngectomized patients an option to produce voice in a more comfortable and natural way. The prototype is designed to be implanted as a low voltage microchip for automatic activation of any electrolarynx by using the myoelectric signals exhibited by muscles. The prototype system exhibits an excellent simulated performance from the bioamplifier through the activation microcontroller using a simulated electromyographic signal. View full abstract»

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  • Built-In Hardware for Analog Circuitry Testing

    Page(s): 14 - 19
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (969 KB) |  | HTML iconHTML  

    Testing analog circuits is a challenging endeavor. The subject paper investigates the oscillation-based built-in self-test (OBIST) technique for testing the analog circuits. An analog circuit-testing environment based on the OBIST method is considered and implemented.Experimental results show that OBIST is a promising testing method for analog circuits which neither requires a stimulus generator nor a complex result analyzer. View full abstract»

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  • Prototype of Patch Antenna for Wi-Fi Communication

    Page(s): 20 - 23
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1127 KB) |  | HTML iconHTML  

    Indoor wireless communication takes interest, because the wires are cumbersome and generate less free space. For this type of communication, 2.4 Ghz is a widely used frequency among electronic equipments, mainly at home and industry. Patch antennas are very popular in wireless communications, specially at home and industry, because they are easy to design and easy to integrate with microwave integrated circuits. They have others advantages, such as: light weigh, little volume, low fabrication cost, etc. In this work, the prototype of a rectangular patch antenna designed for Wireless Fidelity, Wi-Fi, with linear polarization, is presented. On the base of this rectangular antenna, it was realized cuts and grooves in order to improve its gain. A comparison on their performance is also shown. View full abstract»

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  • Intelligent Environment for Training of Power Systems Operators

    Page(s): 27 - 32
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (430 KB) |  | HTML iconHTML  

    An important problem faced by power systems is the continuous training of operators. An operator must comprehend the physical operation of the process and must be skilled in handling a number of normal and abnormal operating problems. It is well-known that emotions are important in motivation; if the affect of operators is considered in the training, the process could be improved. This paper presents the architecture of an intelligent environment for training of power system operators, and describes the results in the construction of one of its components: the operator model. This model comprises knowledge and affective aspects about the operator state. The intelligent environment is applied to valve maintenance domain. The aim of our work is to provide operators of complex industrial environments with suitable training from a pedagogical and affective point of view to certify operators in knowledge, skills, expertise, abilities and attitudes for operation of power systems. View full abstract»

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  • Development and Application of an Intelligent System to Predict and Optimize the Surface Roughness of 1018 and 4140 Steel

    Page(s): 33 - 38
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (408 KB) |  | HTML iconHTML  

    The aim of this research is to present a new methodology for predicting and optimizing the surface roughness during machining of 1018 and 4140 Steel. There is particular interest in finding the best machining value parameters that should be used to achieve good surface roughness. These parameter values can be found by this neural intelligent approach. This methodology analyzes and identifies the parameters involved in the machining process; with this information the model is able to predict the surface roughness value in different conditions and then optimize the results with different intelligent heuristics. The experimental results show that we may conclude that this intelligent system is a suitable methodology for predicting and optimizing surface roughness during the machining of 1018 and 4140 Steel. View full abstract»

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  • Optimal Determination of K Constant of Ridge Regression Using a Simple Genetic Algorithm

    Page(s): 39 - 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (223 KB) |  | HTML iconHTML  

    In the present work, the optimal determination of the constant k of ridge regression (RR) model was developed, since this method of regression permit to reduce the multicollinearity problem and it is a one advantage that takes the ridge regression model over ordinary least square (OLS). The optimal constant k was developed by some technique derived from intelligent systems (genetic algorithm) and some statistics techniques. In this paper we present a comparison between these two methodologies for finding the optimal constant k since this constant givesless variance, giving stability to the estimate coefficients and reduce the multicollinearity problem. The results analyzed by the statistical methods, showed that MSR and R2 have very good performance but theVIF's are greater than genetic algorithm (GA) and theGA reduces the VIF's but reduces R2 and increment the MSR. View full abstract»

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  • Self–Adaptive Bacteria Swarm for Optimization

    Page(s): 45 - 49
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (184 KB) |  | HTML iconHTML  

    This paper presents a self-adaptive bacteria swarm optimization algorithm, and its application in a suite of optimization benchmark problems, where the self-adaptive algorithm outperformed in most cases the non adaptive version. The algorithm follows a methodology that uses some concepts included in the evolution strategies for the parameter control, allowing the algorithm to select online the best parameter set. View full abstract»

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  • Recognition of Paraphrasing Pairs

    Page(s): 50 - 55
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (344 KB) |  | HTML iconHTML  

    Our approach to recognize paraphrasing pairs is to make use of lexical relationships as representations of paraphrases. In this paper, we describe a classification process based on logistic regression as the inference mechanism. In this way, the set of features to be analyzed correspond to dependency trees from semantically equivalent paraphrase pairs. The results of the experimentation conducted show how a model constructed around lexical relationships is a plausible alternative for paraphrasing detection. View full abstract»

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  • Inference Optimization Approach in Fuzzy Inference Systems

    Page(s): 56 - 61
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (394 KB) |  | HTML iconHTML  

    This paper tries on the representation of Mamdani kind fuzzy inference systems by means of fuzzy association equations.The methodology is described to represent the control system modeled on fuzzy rules, in a system outlined by equations and inequations. Once represented the system here with the described methodology, these same equations are used to validate the system fuzzy rules. Later a linear programming software is used to solve the equations system and this way to carry out the fuzzy inference. The objective function of the equations system is also optimized through a learning algorithm based on upward search. This approach is demonstrated with an application example. View full abstract»

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  • A Haptic and Fuzzy Logic Controller for Biometric User Verification

    Page(s): 62 - 67
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (275 KB) |  | HTML iconHTML  

    In any business, security in the form of access control is of great importance. This paper outlines an algorithm which can be used for user verification. The system consists of an application which uses a haptic device to capture behavioral biometric features. A fuzzy logic controller then acts as the decision-making or user verification module. The algorithm can initially be used for applications such as online verification or access control to sensitive data. The results to date have been very promising. View full abstract»

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  • Equivalence between Gaussian-Like and Mamdani Fuzzy Methods in the Multi-objective Design of Electronic Circuits

    Page(s): 68 - 73
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1453 KB) |  | HTML iconHTML  

    The optimization of multi-objective designs is a classical problem in manufacturing electronic circuits due to the continuos miniaturization and their huge application in all type of practical issues. Classical techniques for optimizing multi-objective designs are limited when numerous nonlinear behaviors are implied, generating a rise in costs both in computational time and resources. For this reason alternative techniques applying fuzzy logic have been developed for optimizing multi-objective designs of electronic circuits, in particular the Gaussian-like method is an approach widely used for several authors. This paper explains the equivalence of a Mamdani approximation in relation with a Gaussian-like system for performing the control actions of the optimization task, the equivalence is based on a simple functional relation among the parameters of both methods. Two examples in the optimization of active circuits are presented. View full abstract»

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  • Automatic Text Processing for Spanish Texts

    Page(s): 74 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (248 KB) |  | HTML iconHTML  

    This work focuses on some aspects of automatic text processing by using a metric named po defined in a working prototype WIB (Web Intelligent Browser). The word weighting generated by this metric is defined with morphosyntactic considerations and allows the categorization of text words in fuzzy clusters. This weighting could also be used as a model of the original text at a sentence and paragraph level. A case study is presented here to help analyze the interpretation of the categories. View full abstract»

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  • Application of the Gamma Classifier to Environmental Data Prediction

    Page(s): 80 - 84
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (226 KB) |  | HTML iconHTML  

    Analysis of environmental data by means of Artificial Intelligence has become a quite active area of scientific research. Some techniques which have found important application in this area are neural networks, genetic algorithms, and other pattern classifier algorithms, such as SVMs. In the current paper, a member of the Associative Approach of pattern recognition of recent proposal is applied to environmental data from Mexico City. View full abstract»

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  • Hybrid WiFi-WiMAX Network Routing Protocol

    Page(s): 87 - 92
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (626 KB) |  | HTML iconHTML  

    The proliferation of Wireless Local Area Networks (WLANs) facilitates the development of multihop routing protocols. Moreover, the need to cover greater areas has led to the creation of new standards for Wireless Metropolitan Area Networks (WMANs). This paper proposes a new routing protocol that integrates WLANs and WMANs, allowing seamless interconnectivity. View full abstract»

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  • Proposal for a Remote Surgery System Based on Wireless Communications, Electromyography and Robotics

    Page(s): 93 - 98
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    Advances in wireless communication, electromyography and robotics have allowed to foresee advanced medical services as distance surgery. Demand on distance services as surgery to remote locations will help to provide hospitals with the abilities of experienced surgeon that will not need to move. Using advanced communication networks and dedicated robotic systems, highly skilled physicians in collaboration with local general physicians will be able to diagnose diseases, monitor vital signals, heal injuries, place prosthesis and conduct remote surgery in real time, at different locations. This paper presents then a 2 degrees of freedom robotic arm controlled at distance intended to remote surgery. The system use a basic robotic arm, surface electromyographic signals electronic processed as base band signals for a wireless communication system for remote control. View full abstract»

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