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Garcia-Diaz</title> <meta name="description" content="Search results for: Cesar Garcia-Diaz"> <meta name="keywords" content="Cesar Garcia-Diaz"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Cesar Garcia-Diaz"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 85</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Cesar Garcia-Diaz</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">85</span> Ensuring Consistency under the Snapshot Isolation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Roberto%20Val%C3%AAncio">Carlos Roberto Valêncio</a>, <a href="https://publications.waset.org/abstracts/search?q=F%C3%A1bio%20Renato%20de%20Almeida"> Fábio Renato de Almeida</a>, <a href="https://publications.waset.org/abstracts/search?q=Thatiane%20Kawabata"> Thatiane Kawabata</a>, <a href="https://publications.waset.org/abstracts/search?q=Leandro%20Alves%20Neves"> Leandro Alves Neves</a>, <a href="https://publications.waset.org/abstracts/search?q=Julio%20Cesar%20Momente"> Julio Cesar Momente</a>, <a href="https://publications.waset.org/abstracts/search?q=Mario%20Luiz%20Tronco"> Mario Luiz Tronco</a>, <a href="https://publications.waset.org/abstracts/search?q=Angelo%20Cesar%20Colombini"> Angelo Cesar Colombini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> By running transactions under the Snapshot isolation we can achieve a good level of concurrency, specially in databases with high-intensive read workloads. However, Snapshot is not immune to all the problems that arise from competing transactions and therefore no serialization warranty exists. We propose in this paper a technique to obtain data consistency with Snapshot by using some special triggers that we named Daemon Triggers. Besides keeping the benefits of the Snapshot isolation, the technique is specially useful for those database systems that do not have an isolation level that ensures serializability, like Firebird and Oracle. We describe all the anomalies that might arise when using the Snapshot isolation and show how to preclude them with Daemon Triggers. Based on the methodology presented here, it is also proposed the creation of a new isolation level: Daemon Snapshot. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=data%20consistency" title="data consistency">data consistency</a>, <a href="https://publications.waset.org/abstracts/search?q=serialization" title=" serialization"> serialization</a>, <a href="https://publications.waset.org/abstracts/search?q=snapshot" title=" snapshot"> snapshot</a>, <a href="https://publications.waset.org/abstracts/search?q=isolation" title=" isolation"> isolation</a> </p> <a href="https://publications.waset.org/abstracts/10560/ensuring-consistency-under-the-snapshot-isolation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10560.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">329</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">84</span> Finite Element Modeling of the Mechanical Behavior of Municipal Solid Waste Incineration Bottom Ash with the Mohr-Coulomb Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Le%20Ngoc%20Hung">Le Ngoc Hung</a>, <a href="https://publications.waset.org/abstracts/search?q=Abriak%20Nor%20Edine"> Abriak Nor Edine</a>, <a href="https://publications.waset.org/abstracts/search?q=Binetruy%20Christophe"> Binetruy Christophe</a>, <a href="https://publications.waset.org/abstracts/search?q=Benzerzour%20Mahfoud"> Benzerzour Mahfoud</a>, <a href="https://publications.waset.org/abstracts/search?q=Shahrour%20Isam"> Shahrour Isam</a>, <a href="https://publications.waset.org/abstracts/search?q=Patrice%20Rivard"> Patrice Rivard</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bottom ash from Municipal Solid Waste Incineration (MSWI) can be viewed as a typical granular material because these industrial by-products result from the incineration of various domestic wastes. MSWI bottom ashes are mainly used in road engineering in substitution of the traditional natural aggregates. As the characterization of their mechanical behavior is essential in order to use them, specific studies have been led over the past few years. In the first part of this paper, the mechanical behavior of MSWI bottom ash is studied with triaxial tests. After analysis of the experiment results, the simulation of triaxial tests is carried out by using the software package CESAR-LCPC. As the first approach in modeling of this new class material, the Mohr-Coulomb model was chosen to describe the evolution of material under the influence of external mechanical actions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bottom%20ash" title="bottom ash">bottom ash</a>, <a href="https://publications.waset.org/abstracts/search?q=granular%20material" title=" granular material"> granular material</a>, <a href="https://publications.waset.org/abstracts/search?q=triaxial%20test" title=" triaxial test"> triaxial test</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20behavior" title=" mechanical behavior"> mechanical behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohr-Coulomb%20model" title=" Mohr-Coulomb model"> Mohr-Coulomb model</a>, <a href="https://publications.waset.org/abstracts/search?q=CESAR-LCPC" title=" CESAR-LCPC"> CESAR-LCPC</a> </p> <a href="https://publications.waset.org/abstracts/36317/finite-element-modeling-of-the-mechanical-behavior-of-municipal-solid-waste-incineration-bottom-ash-with-the-mohr-coulomb-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36317.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">313</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">83</span> Scaling out Sustainable Land Use Systems in Colombia: Some Insights and Implications from Two Regional Case Studies </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Martha%20Lilia%20Del%20Rio%20Duque">Martha Lilia Del Rio Duque</a>, <a href="https://publications.waset.org/abstracts/search?q=Michelle%20Bonatti"> Michelle Bonatti</a>, <a href="https://publications.waset.org/abstracts/search?q=Katharina%20Loehr"> Katharina Loehr</a>, <a href="https://publications.waset.org/abstracts/search?q=Marcos%20Lana"> Marcos Lana</a>, <a href="https://publications.waset.org/abstracts/search?q=Tatiana%20Rodriguez"> Tatiana Rodriguez</a>, <a href="https://publications.waset.org/abstracts/search?q=Stefan%20Sieber"> Stefan Sieber</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays, most agricultural practices can reduce the ability of ecosystems to provide goods and services. To enhance environmentally friendly food production and to maximize social and economic benefits, sustainable land use systems (SLUS) are one of the most critical strategies increasingly/strongly promoted by donors organizations, international agencies, and policymakers. This process involves the question of how SLUS can be scaled out also large-scale landscapes and not merely isolated experiments. As SLUS are context-specific strategies, diffusion and replication of successful SLUS in Colombia required the identification of main factors that facilitate this scaling out process. We applied a case study approach to investigate the scaling out process of SLUS in cocoa and livestock sector within peacebuilding territories in Colombia, specifically, in Cesar and Caqueta region. These two regions are contrasting, but both have a current trend of increasing land degradation. Presently in Colombia, Caqueta is one of the most deforested departments, and Cesar has some most degraded soils. Following a qualitative research approach, 19 semi-structured interviews and 2 focus groups were conducted with agroforestry experts in both regions to analyze (1) what does it mean a sustainable land use system in Cocoa/Livestock, specifically in Caqueta or Cesar and (2) to identify the key elements at the level of the following dimensions: biophysical, economic and profitability, market, social, policy and institutions that can explain how and why SLUS are replicated and spread among more producers. The Interviews were coded and analyzed using MAXQDA to identify, analyze and report patterns (themes) within data. As the results show, key themes, among which: premium market, solid regional markets and price stability, water availability and management, generational renewal, land use knowledge and diversification, producer organization and certifications are crucial to understand how the SLUS can have an impact across large-scale landscapes and how the scaling out process can be set up best in order to be successful across different contexts. The analysis further reveals which key factors might affect SLUS efficiency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=agroforestry" title="agroforestry">agroforestry</a>, <a href="https://publications.waset.org/abstracts/search?q=cocoa%20sector" title=" cocoa sector"> cocoa sector</a>, <a href="https://publications.waset.org/abstracts/search?q=Colombia" title=" Colombia"> Colombia</a>, <a href="https://publications.waset.org/abstracts/search?q=livestock%20sector" title=" livestock sector"> livestock sector</a>, <a href="https://publications.waset.org/abstracts/search?q=sustainable%20land%20use%20system" title=" sustainable land use system"> sustainable land use system</a> </p> <a href="https://publications.waset.org/abstracts/129873/scaling-out-sustainable-land-use-systems-in-colombia-some-insights-and-implications-from-two-regional-case-studies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/129873.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">160</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">82</span> Educase–Intelligent System for Pedagogical Advising Using Case-Based Reasoning</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elionai%20Moura">Elionai Moura</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20A.%20Cunha"> José A. Cunha</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20Analide"> César Analide</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work introduces a proposal scheme for an Intelligent System applied to Pedagogical Advising using Case-Based Reasoning, to find consolidated solutions before used for the new problems, making easier the task of advising students to the pedagogical staff. We do intend, through this work, introduce the motivation behind the choices for this system structure, justifying the development of an incremental and smart web system who learns bests solutions for new cases when it’s used, showing technics and technology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=case-based%20reasoning" title="case-based reasoning">case-based reasoning</a>, <a href="https://publications.waset.org/abstracts/search?q=pedagogical%20advising" title=" pedagogical advising"> pedagogical advising</a>, <a href="https://publications.waset.org/abstracts/search?q=educational%20data-mining%20%28EDM%29" title=" educational data-mining (EDM)"> educational data-mining (EDM)</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a> </p> <a href="https://publications.waset.org/abstracts/27352/educase-intelligent-system-for-pedagogical-advising-using-case-based-reasoning" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27352.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">421</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">81</span> Design and Study of a DC/DC Converter for High Power, 14.4 V and 300 A for Automotive Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J%C3%BAlio%20Cesar%20Lopes%20de%20Oliveira">Júlio Cesar Lopes de Oliveira</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Henrique%20Gon%C3%A7alves%20Treviso"> Carlos Henrique Gonçalves Treviso</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The shortage of the automotive market in relation to options for sources of high power car audio systems, led to development of this work. Thus, we developed a source with stabilized voltage with 4320 W effective power. Designed to the voltage of 14.4 V and a choice of two currents: 30 A load option in battery banks and 300 A at full load. This source can also be considered as a source of general use dedicated commercial with a simple control circuit in analog form based on discrete components. The assembly of power circuit uses a methodology for higher power than the initially stipulated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DC-DC%20power%20converters" title="DC-DC power converters">DC-DC power converters</a>, <a href="https://publications.waset.org/abstracts/search?q=converters" title=" converters"> converters</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20conversion" title=" power conversion"> power conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20width%20modulation%20converters" title=" pulse width modulation converters"> pulse width modulation converters</a> </p> <a href="https://publications.waset.org/abstracts/2284/design-and-study-of-a-dcdc-converter-for-high-power-144-v-and-300-a-for-automotive-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2284.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">384</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">80</span> Undocumented Migrants on the Northern Border of Mexico: Social Imaginary, and Social Representations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20Enrique%20Jim%C3%A9nez%20Ya%C3%B1ez">César Enrique Jiménez Yañez</a>, <a href="https://publications.waset.org/abstracts/search?q=Yessica%20Martinez%20Soto"> Yessica Martinez Soto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present work, the phenomenon of undocumented migration in the northern border of Mexico is analyzed through the graphic representation of the experience of people who migrate in an undocumented way to the United States. 33 of them drew what it meant for them to migrate. Our objective is to analyze the social phenomenon of migration through the drawings of migrants, using the concepts of social imaginary and social representations, identifying the different significant elements with which this symbolically builds their experience. Drawing, as a methodological tool, will help us to understand the migratory experience beyond words. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mexico" title="Mexico">Mexico</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20imaginary" title=" social imaginary"> social imaginary</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20representations" title=" social representations"> social representations</a>, <a href="https://publications.waset.org/abstracts/search?q=undocumented%20migrants" title=" undocumented migrants"> undocumented migrants</a> </p> <a href="https://publications.waset.org/abstracts/91275/undocumented-migrants-on-the-northern-border-of-mexico-social-imaginary-and-social-representations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91275.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">401</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">79</span> Optimization Model for Support Decision for Maximizing Production of Mixed Fruit Tree Farms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Andr%C3%A9s%20I.%20%C3%81vila">Andrés I. Ávila</a>, <a href="https://publications.waset.org/abstracts/search?q=Patricia%20Aros"> Patricia Aros</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20San%20Mart%C3%ADn"> César San Martín</a>, <a href="https://publications.waset.org/abstracts/search?q=Elizabeth%20Kehr"> Elizabeth Kehr</a>, <a href="https://publications.waset.org/abstracts/search?q=Yovana%20Leal"> Yovana Leal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We consider a linear programming model to help farmers to decide if it is convinient to choose among three kinds of export fruits for their future investment. We consider area, investment, water, productivitiy minimal unit, and harvest restrictions and a monthly based model to compute the average income in five years. Also, conditions on the field as area, water availability and initia investment are required. Using the Chilean costs and dollar-peso exchange rate, we can simulate several scenarios to understand the possible risks associated to this market. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mixed%20integer%20problem" title="mixed integer problem">mixed integer problem</a>, <a href="https://publications.waset.org/abstracts/search?q=fruit%20production" title=" fruit production"> fruit production</a>, <a href="https://publications.waset.org/abstracts/search?q=support%20decision%20model" title=" support decision model"> support decision model</a>, <a href="https://publications.waset.org/abstracts/search?q=fruit%20tree%20farms" title=" fruit tree farms"> fruit tree farms</a> </p> <a href="https://publications.waset.org/abstracts/18920/optimization-model-for-support-decision-for-maximizing-production-of-mixed-fruit-tree-farms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18920.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">456</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">78</span> Flow Visualization in Biological Complex Geometries for Personalized Medicine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Escobar-del%20Pozo">Carlos Escobar-del Pozo</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20Ahumada-Monroy"> César Ahumada-Monroy</a>, <a href="https://publications.waset.org/abstracts/search?q=Azael%20Garc%C3%ADa-Rebolledo"> Azael García-Rebolledo</a>, <a href="https://publications.waset.org/abstracts/search?q=Alberto%20Brambila-Sol%C3%B3rzano"> Alberto Brambila-Solórzano</a>, <a href="https://publications.waset.org/abstracts/search?q=Gregorio%20Mart%C3%ADnez-S%C3%A1nchez"> Gregorio Martínez-Sánchez</a>, <a href="https://publications.waset.org/abstracts/search?q=Luis%20Ortiz-Rinc%C3%B3n"> Luis Ortiz-Rincón</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical simulations of flow in complex biological structures have gained considerable attention in the last years. However, the major issue is the validation of the results. The present work shows a Particle Image Velocimetry PIV flow visualization technique in complex biological structures, particularly in intracranial aneurysms. A methodology to reconstruct and generate a transparent model has been developed, as well as visualization and particle tracking techniques. The generated transparent models allow visualizing the flow patterns with a regular camera using the visualization techniques. The final goal is to use visualization as a tool to provide more information on the treatment and surgery decisions in aneurysms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aneurysms" title="aneurysms">aneurysms</a>, <a href="https://publications.waset.org/abstracts/search?q=PIV" title=" PIV"> PIV</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20visualization" title=" flow visualization"> flow visualization</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20tracking" title=" particle tracking"> particle tracking</a> </p> <a href="https://publications.waset.org/abstracts/165909/flow-visualization-in-biological-complex-geometries-for-personalized-medicine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165909.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">77</span> Experimental Networks Synchronization of Chua’s Circuit in Different Topologies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manuel%20Meranza-Castillon">Manuel Meranza-Castillon</a>, <a href="https://publications.waset.org/abstracts/search?q=Rolando%20Diaz-Castillo"> Rolando Diaz-Castillo</a>, <a href="https://publications.waset.org/abstracts/search?q=Adrian%20Arellano-Delgado"> Adrian Arellano-Delgado</a>, <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Cruz-Hernandez"> Cesar Cruz-Hernandez</a>, <a href="https://publications.waset.org/abstracts/search?q=Rosa%20Martha%20Lopez-Gutierrez"> Rosa Martha Lopez-Gutierrez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we deal with experimental network synchronization of chaotic nodes with different topologies. Our approach is based on complex system theory, and we use a master-slave configuration to couple the nodes in the networks. In particular, we design and implement electronically complex dynamical networks composed by nine coupled chaotic Chua’s circuits with topologies: in nearest-neighbor, small-world, open ring, star, and global. Also, network synchronization is evaluated according to a particular coupling strength for each topology. This study is important by the possible applications to private transmission of information in a chaotic communication network of multiple users. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=complex%20networks" title="complex networks">complex networks</a>, <a href="https://publications.waset.org/abstracts/search?q=Chua%27s%20circuit" title=" Chua's circuit"> Chua's circuit</a>, <a href="https://publications.waset.org/abstracts/search?q=experimental%20synchronization" title=" experimental synchronization"> experimental synchronization</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20users" title=" multiple users"> multiple users</a> </p> <a href="https://publications.waset.org/abstracts/64455/experimental-networks-synchronization-of-chuas-circuit-in-different-topologies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64455.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">348</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">76</span> Proactive Pure Handoff Model with SAW-TOPSIS Selection and Time Series Predict</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Harold%20V%C3%A1squez">Harold Vásquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Hern%C3%A1ndez"> Cesar Hernández</a>, <a href="https://publications.waset.org/abstracts/search?q=Ingrid%20P%C3%A1ez"> Ingrid Páez </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper approach cognitive radio technic and applied pure proactive handoff Model to decrease interference between PU and SU and comparing it with reactive handoff model. Through the study and analysis of multivariate models SAW and TOPSIS join to 3 dynamic prediction techniques AR, MA ,and ARMA. To evaluate the best model is taken four metrics: number failed handoff, number handoff, number predictions, and number interference. The result presented the advantages using this type of pure proactive models to predict changes in the PU according to the selected channel and reduce interference. The model showed better performance was TOPSIS-MA, although TOPSIS-AR had a higher predictive ability this was not reflected in the interference reduction. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cognitive%20radio" title="cognitive radio">cognitive radio</a>, <a href="https://publications.waset.org/abstracts/search?q=spectrum%20handoff" title=" spectrum handoff"> spectrum handoff</a>, <a href="https://publications.waset.org/abstracts/search?q=decision%20making" title=" decision making"> decision making</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20series" title=" time series"> time series</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20networks" title=" wireless networks"> wireless networks</a> </p> <a href="https://publications.waset.org/abstracts/33216/proactive-pure-handoff-model-with-saw-topsis-selection-and-time-series-predict" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33216.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">487</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">75</span> Influence of Decolourisation Condition on the Physicochemical Properties of Shea (Vitellaria paradoxa Gaertner F) Butter</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Mohammed%20Mohagir">Ahmed Mohammed Mohagir</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmat-Charfadine%20Mahamat"> Ahmat-Charfadine Mahamat</a>, <a href="https://publications.waset.org/abstracts/search?q=Nde%20Divine%20Bup"> Nde Divine Bup</a>, <a href="https://publications.waset.org/abstracts/search?q=Richard%20Kamga"> Richard Kamga</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20Kapseu"> César Kapseu </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this investigation, kinetics studies of adsorption of colour material of shea butter showed a peak at the wavelength 440 nm and the equilibrium time was found to be 30 min. Response surface methodology applying Doehlert experimental design was used to investigate decolourisation parameters of crude shea butter. The decolourisation process was significantly influenced by three independent parameters: contact time, decolourisation temperature and adsorbent dose. The responses of the process were oil loss, acid value, peroxide value and colour index. Response surface plots were successfully made to visualise the effect of the independent parameters on the responses of the process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=decolourisation" title="decolourisation">decolourisation</a>, <a href="https://publications.waset.org/abstracts/search?q=doehlert%20experimental%20design" title=" doehlert experimental design"> doehlert experimental design</a>, <a href="https://publications.waset.org/abstracts/search?q=physicochemical%20characterisation" title=" physicochemical characterisation"> physicochemical characterisation</a>, <a href="https://publications.waset.org/abstracts/search?q=RSM" title=" RSM"> RSM</a>, <a href="https://publications.waset.org/abstracts/search?q=shea%20butter" title=" shea butter"> shea butter</a> </p> <a href="https://publications.waset.org/abstracts/17839/influence-of-decolourisation-condition-on-the-physicochemical-properties-of-shea-vitellaria-paradoxa-gaertner-f-butter" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17839.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">416</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">74</span> Performance Assessment in a Voice Coil Motor for Maximizing the Energy Harvesting with Gait Motions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hector%20A.%20Tinoco">Hector A. Tinoco</a>, <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Garcia-Diaz"> Cesar Garcia-Diaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Olga%20L.%20Ocampo-Lopez"> Olga L. Ocampo-Lopez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, an experimental approach is established to assess the performance of different beams coupled to a Voice Coil Motor (VCM) with the aim to maximize mechanically the energy harvesting in the inductive transducer that is included on it. The VCM is extracted from a recycled hard disk drive (HDD) and it is adapted for carrying out experimental tests of energy harvesting. Two individuals were selected for walking with the VCM-beam device as well as to evaluate the performance varying two parameters in the beam; length of the beams and a mass addition. Results show that the energy harvesting is maximized with specific beams; however, the harvesting efficiency is improved when a mass is added to the end of the beams. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hard%20disk%20drive" title="hard disk drive">hard disk drive</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20harvesting" title=" energy harvesting"> energy harvesting</a>, <a href="https://publications.waset.org/abstracts/search?q=voice%20coil%20motor" title=" voice coil motor"> voice coil motor</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20harvester" title=" energy harvester"> energy harvester</a>, <a href="https://publications.waset.org/abstracts/search?q=gait%20motions" title=" gait motions"> gait motions</a> </p> <a href="https://publications.waset.org/abstracts/56716/performance-assessment-in-a-voice-coil-motor-for-maximizing-the-energy-harvesting-with-gait-motions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56716.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">351</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">73</span> Relation of Electromyography, Strength and Fatigue During Ramp Isometric Contractions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Ferreira%20Amorim">Cesar Ferreira Amorim</a>, <a href="https://publications.waset.org/abstracts/search?q=Tamotsu%20Hirata"> Tamotsu Hirata</a>, <a href="https://publications.waset.org/abstracts/search?q=Runer%20Augusto%20Marson"> Runer Augusto Marson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this study was to determine the effect of strength ramp isometric contraction on changes in surface electromyography (sEMG) signal characteristics of the hamstrings muscles. All measurements were obtained from 20 healthy well trained healthy adults (age 19.5 ± 0.8 yrs, body mass 63.4 ± 1.5 kg, height: 1.65 ± 0.05 m). Subjects had to perform isometric ramp contractions in knee flexion with the force gradually increasing from 0 to 40% of the maximal voluntary contraction (MVC) in a 20s period. The root mean square (RMS) amplitude of sEMG signals obtained from the biceps femoris (caput longum) were calculated at four different strength levels (10, 20, 30, and 40% MVC) from the ramp isometric contractions (5s during the 20s task %MVC). The main results were a more pronounced increase non-linear in sEMG-RMS amplitude for the muscles. The protocol described here may provide a useful index for measuring of strength neuromuscular fatigue. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biosignal" title="biosignal">biosignal</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20electromyography" title=" surface electromyography"> surface electromyography</a>, <a href="https://publications.waset.org/abstracts/search?q=ramp%20contractions" title=" ramp contractions"> ramp contractions</a>, <a href="https://publications.waset.org/abstracts/search?q=strength" title=" strength"> strength</a> </p> <a href="https://publications.waset.org/abstracts/32275/relation-of-electromyography-strength-and-fatigue-during-ramp-isometric-contractions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32275.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">483</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">72</span> Raising High School English Teachers' Awareness of World Englishes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Julio%20Cesar%20Torres%20Rocha">Julio Cesar Torres Rocha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study is a three-stage action research that aims at raising EFL teachers’ awareness of World Englishes (WE) within a critical perspective of inquiry. Through a taught module on English and its varieties, a survey, a reflection paper, and a semi-structured interview were used to collect the data. The results of the study showed that there was a clear change of conception, at the theoretical level, in teachers’ papers. However, WE was regarded as future possibility for action. On the one hand, all of the participants said the module changed their conception of other varieties of English different from British and American ones. They all went from identifying themselves with either American or British variety, a celebratory perspective, to acknowledging and accepting other English varieties, a critical perspective of English as an international language (EIL). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=teachers%E2%80%99%20s%20awareness" title="teachers’ s awareness">teachers’ s awareness</a>, <a href="https://publications.waset.org/abstracts/search?q=English%20as%20an%20international%20language" title=" English as an international language"> English as an international language</a>, <a href="https://publications.waset.org/abstracts/search?q=introducing%20world%20Englishes" title=" introducing world Englishes"> introducing world Englishes</a>, <a href="https://publications.waset.org/abstracts/search?q=critical%20applied%20linguistics" title=" critical applied linguistics"> critical applied linguistics</a> </p> <a href="https://publications.waset.org/abstracts/43992/raising-high-school-english-teachers-awareness-of-world-englishes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43992.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">522</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">71</span> A Family of Distributions on Learnable Problems without Uniform Convergence</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20Garza">César Garza</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In supervised binary classification and regression problems, it is well-known that learnability is equivalent to a uniform convergence of the hypothesis class, and if a problem is learnable, it is learnable by empirical risk minimization. For the general learning setting of unsupervised learning tasks, there are non-trivial learning problems where uniform convergence does not hold. We present here the task of learning centers of mass with an extra feature that “activates” some of the coordinates over the unit ball in a Hilbert space. We show that the learning problem is learnable under a stable RLM rule. We introduce a family of distributions over the domain space with some mild restrictions for which the sample complexity of uniform convergence for these problems must grow logarithmically with the dimension of the Hilbert space. If we take this dimension to infinity, we obtain a learnable problem for which the uniform convergence property fails for a vast family of distributions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=statistical%20learning%20theory" title="statistical learning theory">statistical learning theory</a>, <a href="https://publications.waset.org/abstracts/search?q=learnability" title=" learnability"> learnability</a>, <a href="https://publications.waset.org/abstracts/search?q=uniform%20convergence" title=" uniform convergence"> uniform convergence</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a>, <a href="https://publications.waset.org/abstracts/search?q=regularized%20loss%20minimization" title=" regularized loss minimization"> regularized loss minimization</a> </p> <a href="https://publications.waset.org/abstracts/151038/a-family-of-distributions-on-learnable-problems-without-uniform-convergence" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151038.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">129</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">70</span> Collective Movement between Two Lego EV3 Mobile Robots</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Luis%20Fernando%20Pinedo-Lomeli">Luis Fernando Pinedo-Lomeli</a>, <a href="https://publications.waset.org/abstracts/search?q=Rosa%20Martha%20Lopez-Gutierrez"> Rosa Martha Lopez-Gutierrez</a>, <a href="https://publications.waset.org/abstracts/search?q=Jose%20Antonio%20Michel-Macarty"> Jose Antonio Michel-Macarty</a>, <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Cruz-Hernandez"> Cesar Cruz-Hernandez</a>, <a href="https://publications.waset.org/abstracts/search?q=Liliana%20Cardoza-Avenda%C3%B1o"> Liliana Cardoza-Avendaño</a>, <a href="https://publications.waset.org/abstracts/search?q=Humberto%20Cruz-Hernandez"> Humberto Cruz-Hernandez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Robots are working in industry and services performing repetitive or dangerous tasks, however, when flexible movement capabilities and complex tasks are required, the use of many robots is needed. Also, productivity can be improved by reducing times to perform tasks. In the last years, a lot of effort has been invested in research and development of collective control of mobile robots. This interest is justified as there are many advantages when two or more robots are collaborating in a particular task. Some examples are: cleaning toxic waste, transportation and manipulation of objects, exploration, and surveillance, search and rescue. In this work a study of collective movements of mobile robots is presented. A solution of collisions avoidance is developed. This solution is levered on a communication implementation that allows coordinate movements in different paths were avoiding obstacles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=synchronization" title="synchronization">synchronization</a>, <a href="https://publications.waset.org/abstracts/search?q=communication" title=" communication"> communication</a>, <a href="https://publications.waset.org/abstracts/search?q=robots" title=" robots"> robots</a>, <a href="https://publications.waset.org/abstracts/search?q=legos" title=" legos"> legos</a> </p> <a href="https://publications.waset.org/abstracts/64452/collective-movement-between-two-lego-ev3-mobile-robots" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64452.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">432</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">69</span> Hybrid Algorithm for Frequency Channel Selection in Wi-Fi Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Hern%C3%A1ndez">Cesar Hernández</a>, <a href="https://publications.waset.org/abstracts/search?q=Diego%20Giral"> Diego Giral</a>, <a href="https://publications.waset.org/abstracts/search?q=Ingrid%20P%C3%A1ez"> Ingrid Páez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article proposes a hybrid algorithm for spectrum allocation in cognitive radio networks based on the algorithms Analytical Hierarchical Process (AHP) and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) to improve the performance of the spectrum mobility of secondary users in cognitive radio networks. To calculate the level of performance of the proposed algorithm a comparative analysis between the proposed AHP-TOPSIS, Grey Relational Analysis (GRA) and Multiplicative Exponent Weighting (MEW) algorithm is performed. Four evaluation metrics is used. These metrics are the accumulative average of failed handoffs, the accumulative average of handoffs performed, the accumulative average of transmission bandwidth, and the accumulative average of the transmission delay. The results of the comparison show that AHP-TOPSIS Algorithm provides 2.4 times better performance compared to a GRA Algorithm and, 1.5 times better than the MEW Algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cognitive%20radio" title="cognitive radio">cognitive radio</a>, <a href="https://publications.waset.org/abstracts/search?q=decision%20making" title=" decision making"> decision making</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20algorithm" title=" hybrid algorithm"> hybrid algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=spectrum%20handoff" title=" spectrum handoff"> spectrum handoff</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20networks" title=" wireless networks"> wireless networks</a> </p> <a href="https://publications.waset.org/abstracts/34830/hybrid-algorithm-for-frequency-channel-selection-in-wi-fi-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34830.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">541</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">68</span> Digitalization in Aggregate Quarries</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Eugenio%20Ortiz">José Eugenio Ortiz</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre%20Plaza"> Pierre Plaza</a>, <a href="https://publications.waset.org/abstracts/search?q=Josefa%20Herrero"> Josefa Herrero</a>, <a href="https://publications.waset.org/abstracts/search?q=Iv%C3%A1n%20Cabria"> Iván Cabria</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Luis%20Blanco"> José Luis Blanco</a>, <a href="https://publications.waset.org/abstracts/search?q=Javier%20Gavilanes"> Javier Gavilanes</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Ignacio%20Escavy"> José Ignacio Escavy</a>, <a href="https://publications.waset.org/abstracts/search?q=Ignacio%20L%C3%B3pez-Cilla"> Ignacio López-Cilla</a>, <a href="https://publications.waset.org/abstracts/search?q=Virginia%20Yag%C3%BCe"> Virginia Yagüe</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20P%C3%A9rez"> César Pérez</a>, <a href="https://publications.waset.org/abstracts/search?q=Silvia%20Rodr%C3%ADguez"> Silvia Rodríguez</a>, <a href="https://publications.waset.org/abstracts/search?q=Jorge%20Rico"> Jorge Rico</a>, <a href="https://publications.waset.org/abstracts/search?q=Cecilia%20Serrano"> Cecilia Serrano</a>, <a href="https://publications.waset.org/abstracts/search?q=Jes%C3%BAs%20Bernat"> Jesús Bernat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The development of Artificial Intelligence services in mining processes, specifically in aggregate quarries, is facilitating automation and improving numerous aspects of operations. Ultimately, AI is transforming the mining industry by improving efficiency, safety and sustainability. With the ability to analyze large amounts of data and make autonomous decisions, AI offers great opportunities to optimize mining operations and maximize the economic and social benefits of this vital industry. Within the framework of the European DIGIECOQUARRY project, various services were developed for the identification of material quality, production estimation, detection of anomalies and prediction of consumption and production automatically with good results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aggregates" title="aggregates">aggregates</a>, <a href="https://publications.waset.org/abstracts/search?q=artificial%20intelligence" title=" artificial intelligence"> artificial intelligence</a>, <a href="https://publications.waset.org/abstracts/search?q=automatization" title=" automatization"> automatization</a>, <a href="https://publications.waset.org/abstracts/search?q=mining%20operations" title=" mining operations"> mining operations</a> </p> <a href="https://publications.waset.org/abstracts/175659/digitalization-in-aggregate-quarries" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/175659.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">88</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">67</span> MCDM Spectrum Handover Models for Cognitive Wireless Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Hern%C3%A1ndez">Cesar Hernández</a>, <a href="https://publications.waset.org/abstracts/search?q=Diego%20Giral"> Diego Giral</a>, <a href="https://publications.waset.org/abstracts/search?q=Fernando%20Santa"> Fernando Santa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The spectral handoff is important in cognitive wireless networks to ensure an adequate quality of service and performance for secondary user communications. This work proposes a benchmarking of performance of the three spectrum handoff models: VIKOR, SAW and MEW. Four evaluation metrics are used. These metrics are, accumulative average of failed handoffs, accumulative average of handoffs performed, accumulative average of transmission bandwidth and, accumulative average of the transmission delay. As a difference with related work, the performance of the three spectrum handoff models was validated with captured data of spectral occupancy in experiments realized at the GSM frequency band (824 MHz-849 MHz). These data represent the actual behavior of the licensed users for this wireless frequency band. The results of the comparative show that VIKOR Algorithm provides 15.8% performance improvement compared to a SAW Algorithm and, 12.1% better than the MEW Algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cognitive%20radio" title="cognitive radio">cognitive radio</a>, <a href="https://publications.waset.org/abstracts/search?q=decision%20making" title=" decision making"> decision making</a>, <a href="https://publications.waset.org/abstracts/search?q=MEW" title=" MEW"> MEW</a>, <a href="https://publications.waset.org/abstracts/search?q=SAW" title=" SAW"> SAW</a>, <a href="https://publications.waset.org/abstracts/search?q=spectrum%20handoff" title=" spectrum handoff"> spectrum handoff</a>, <a href="https://publications.waset.org/abstracts/search?q=VIKOR" title=" VIKOR"> VIKOR</a> </p> <a href="https://publications.waset.org/abstracts/33174/mcdm-spectrum-handover-models-for-cognitive-wireless-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33174.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">437</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">66</span> Optimization Model for Support Decision for Maximizing Production of Mixed Fresh Fruit Farms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Andr%C3%A9s%20I.%20%C3%81vila">Andrés I. Ávila</a>, <a href="https://publications.waset.org/abstracts/search?q=Patricia%20Aros"> Patricia Aros</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20San%20Mart%C3%ADn"> César San Martín</a>, <a href="https://publications.waset.org/abstracts/search?q=Elizabeth%20Kehr"> Elizabeth Kehr</a>, <a href="https://publications.waset.org/abstracts/search?q=Yovana%20Leal"> Yovana Leal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Planning models for fresh products is a very useful tool for improving the net profits. To get an efficient supply chain model, several functions should be considered to get a complete simulation of several operational units. We consider a linear programming model to help farmers to decide if it is convenient to choose what area should be planted for three kinds of export fruits considering their future investment. We consider area, investment, water, productivity minimal unit, and harvest restrictions to develop a monthly based model to compute the average income in five years. Also, conditions on the field as area, water availability, and initial investment are required. Using the Chilean costs and dollar-peso exchange rate, we can simulate several scenarios to understand the possible risks associated to this market. Also, this tool help to support decisions for government and individual farmers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mixed%20integer%20problem" title="mixed integer problem">mixed integer problem</a>, <a href="https://publications.waset.org/abstracts/search?q=fresh%20fruit%20production" title=" fresh fruit production"> fresh fruit production</a>, <a href="https://publications.waset.org/abstracts/search?q=support%20decision%20model" title=" support decision model"> support decision model</a>, <a href="https://publications.waset.org/abstracts/search?q=agricultural%20and%20biosystems%20engineering" title=" agricultural and biosystems engineering"> agricultural and biosystems engineering</a> </p> <a href="https://publications.waset.org/abstracts/26591/optimization-model-for-support-decision-for-maximizing-production-of-mixed-fresh-fruit-farms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26591.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">438</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">65</span> Peak Floor Response for Buildings with Flexible Base</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Luciano%20Roberto%20Fernandez-Sola">Luciano Roberto Fernandez-Sola</a>, <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Augusto%20Arredondo-Velez"> Cesar Augusto Arredondo-Velez</a>, <a href="https://publications.waset.org/abstracts/search?q=Miguel%20Angel%20Jaimes-Tellez"> Miguel Angel Jaimes-Tellez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper explores the modifications on peak acceleration, velocity and displacement profiles over the structure due to dynamic soil-structure interaction (DSSI). A shear beam model is used for the structure. Soil-foundation flexibility (inertial interaction) is considered by a set of springs and dashpots at the structure base. Kinematic interaction is considered using transfer functions. Impedance functions are computed using simplified expressions for rigid foundations. The research studies the influence of the slenderness ratio on the value of the peak floor response. It is shown that the modifications of peak floor responses are not the same for acceleration, velocity and displacement. This is opposite to the hypothesis used by methods included in several building codes. Results show that modifications produced by DSSI on different response quantities are not equal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=peak%20floor%20intensities" title="peak floor intensities">peak floor intensities</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20soil-structure%20interaction" title=" dynamic soil-structure interaction"> dynamic soil-structure interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=buildings%20with%20flexible%20base" title=" buildings with flexible base"> buildings with flexible base</a>, <a href="https://publications.waset.org/abstracts/search?q=kinematic%20and%20inertial%20interaction" title=" kinematic and inertial interaction"> kinematic and inertial interaction</a> </p> <a href="https://publications.waset.org/abstracts/65705/peak-floor-response-for-buildings-with-flexible-base" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65705.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">450</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">64</span> Continuous Improvement in Emerging Economies: Insights from a Multi-Case Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Luis%20A.%20Paipa-Galeano">Luis A. Paipa-Galeano</a>, <a href="https://publications.waset.org/abstracts/search?q=Yavar%20Jarrah-Nezhad"> Yavar Jarrah-Nezhad</a>, <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20A.%20Bernal-Torres"> César A. Bernal-Torres</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a case study of four companies in an emerging economy to identify the key success factors and barriers to sustaining continuous improvement practices. The study analyzes the empirical evidence and compares it to the literature review to provide insights for companies looking to increase their maturity level in this area. The five success factors identified are the availability of resources, commitment and support from management, participation of employees in identifying tasks to improve, clear and realistic objectives for continuous improvement, and the existence of a leader or responsible for continuous improvement. The major barriers to success are a lack of alignment between the organization’s strategic objectives and continuous improvement objectives, a lack of motivation in the team, and resistance to change. The paper concludes with recommendations for companies to reduce the risk of improvement failure and increase their maturity level in continuous improvement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=emerging%20economies" title="emerging economies">emerging economies</a>, <a href="https://publications.waset.org/abstracts/search?q=Kaizen" title=" Kaizen"> Kaizen</a>, <a href="https://publications.waset.org/abstracts/search?q=continuous%20improvement%20sustainability" title=" continuous improvement sustainability"> continuous improvement sustainability</a>, <a href="https://publications.waset.org/abstracts/search?q=maturity%20model" title=" maturity model"> maturity model</a> </p> <a href="https://publications.waset.org/abstracts/181887/continuous-improvement-in-emerging-economies-insights-from-a-multi-case-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/181887.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">74</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">63</span> Bibliometric Analysis of the Research Progress on Graphene Inks from 2008 to 2018</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jean%20C.%20A.%20Sousa">Jean C. A. Sousa</a>, <a href="https://publications.waset.org/abstracts/search?q=Julio%20Cesar%20Maciel%20Santos"> Julio Cesar Maciel Santos</a>, <a href="https://publications.waset.org/abstracts/search?q=Andressa%20J.%20Rubio"> Andressa J. Rubio</a>, <a href="https://publications.waset.org/abstracts/search?q=Edneia%20A.%20S.%20Paccola"> Edneia A. S. Paccola</a>, <a href="https://publications.waset.org/abstracts/search?q=Nat%C3%A1lia%20U.%20Yamaguchi"> Natália U. Yamaguchi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A bibliometric analysis in the Web of Science database was used to identify overall scientific results of graphene inks to date (2008 to 2018). The objective of this study was to evaluate the evolutionary tendency of graphene inks research and to identify its aspects, aiming to provide data that can guide future work. The contributions of different researches, languages, thematic categories, periodicals, place of publication, institutes, funding agencies, articles cited and applications were analyzed. The results revealed a growing number of annual publications, of 258 papers found, 107 were included because they met the inclusion criteria. Three main applications were identified: synthesis and characterization, electronics and surfaces. The most relevant research on graphene inks has been summarized in this article, and graphene inks for electronic devices presented the most incident theme according to the research trends during the studied period. It is estimated that this theme will remain in evidence and will contribute to the direction of future research in this area. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bibliometric" title="bibliometric">bibliometric</a>, <a href="https://publications.waset.org/abstracts/search?q=coating" title=" coating"> coating</a>, <a href="https://publications.waset.org/abstracts/search?q=nanomaterials" title=" nanomaterials"> nanomaterials</a>, <a href="https://publications.waset.org/abstracts/search?q=scientometrics" title=" scientometrics"> scientometrics</a> </p> <a href="https://publications.waset.org/abstracts/107522/bibliometric-analysis-of-the-research-progress-on-graphene-inks-from-2008-to-2018" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107522.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">168</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">62</span> Mixed Natural Adsorbents and Oxides for Oil Remediation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Maximo%20Oliva%20Gonz%C3%A1lez">Cesar Maximo Oliva González</a>, <a href="https://publications.waset.org/abstracts/search?q=Javier%20Acevedo%20Cortez"> Javier Acevedo Cortez</a>, <a href="https://publications.waset.org/abstracts/search?q=Boris%20Kharisov"> Boris Kharisov</a>, <a href="https://publications.waset.org/abstracts/search?q=Thelma%20Serrano%20Quezada"> Thelma Serrano Quezada </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The importance of the crude oil refining process is due to the demand for petroleum products such as gasoline, kerosene, asphalt, etc., which are used in daily activities and have a high impact on the global economy. In the processes of oil obtaining and refining, it is common to find problems such as spills on seabed and high energy consumption in processing. In order to quickly and efficiently attack these problems, the use of adsorbents has taken on great importance due to its ease of implementation, as well as the possibility of their regeneration to be reused. In this work, the use of two types of adsorbents is proposed: the first is a natural adsorbent such as aloe vera or nopal, which were lyophilized and hydrophobized to achieve a selectivity in oil adsorption in oil / water mixtures. The second is a mixed iron/nickel oxide, which is specially designed to adsorb the asphaltenes in the heavy fractions of the oil; in addition, this type of adsorbents presents catalytic properties that manage to decompose the heavier fractions of the petroleum in light hydrocarbons, descending thus the energy required for the oil refining process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanomaterials" title="nanomaterials">nanomaterials</a>, <a href="https://publications.waset.org/abstracts/search?q=oil%20spills" title=" oil spills"> oil spills</a>, <a href="https://publications.waset.org/abstracts/search?q=remediation" title=" remediation"> remediation</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20adsorbents" title=" natural adsorbents"> natural adsorbents</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20oxides" title=" mixed oxides"> mixed oxides</a> </p> <a href="https://publications.waset.org/abstracts/72269/mixed-natural-adsorbents-and-oxides-for-oil-remediation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72269.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">241</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">61</span> Comparison of Classical Computer Vision vs. Convolutional Neural Networks Approaches for Weed Mapping in Aerial Images</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Paulo%20Cesar%20Pereira%20Junior">Paulo Cesar Pereira Junior</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexandre%20Monteiro"> Alexandre Monteiro</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafael%20da%20Luz%20Ribeiro"> Rafael da Luz Ribeiro</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20Carlos%20Sobieranski"> Antonio Carlos Sobieranski</a>, <a href="https://publications.waset.org/abstracts/search?q=Aldo%20von%20Wangenheim"> Aldo von Wangenheim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we present a comparison between convolutional neural networks and classical computer vision approaches, for the specific precision agriculture problem of weed mapping on sugarcane fields aerial images. A systematic literature review was conducted to find which computer vision methods are being used on this specific problem. The most cited methods were implemented, as well as four models of convolutional neural networks. All implemented approaches were tested using the same dataset, and their results were quantitatively and qualitatively analyzed. The obtained results were compared to a human expert made ground truth for validation. The results indicate that the convolutional neural networks present better precision and generalize better than the classical models. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=convolutional%20neural%20networks" title="convolutional neural networks">convolutional neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=deep%20learning" title=" deep learning"> deep learning</a>, <a href="https://publications.waset.org/abstracts/search?q=digital%20image%20processing" title=" digital image processing"> digital image processing</a>, <a href="https://publications.waset.org/abstracts/search?q=precision%20agriculture" title=" precision agriculture"> precision agriculture</a>, <a href="https://publications.waset.org/abstracts/search?q=semantic%20segmentation" title=" semantic segmentation"> semantic segmentation</a>, <a href="https://publications.waset.org/abstracts/search?q=unmanned%20aerial%20vehicles" title=" unmanned aerial vehicles"> unmanned aerial vehicles</a> </p> <a href="https://publications.waset.org/abstracts/112982/comparison-of-classical-computer-vision-vs-convolutional-neural-networks-approaches-for-weed-mapping-in-aerial-images" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112982.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">260</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">60</span> Batch Biodrying of Pulp and Paper Secondary Sludge: Influence of Initial Moisture Content on the Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9sar%20Huili%C3%B1ir">César Huiliñir</a>, <a href="https://publications.waset.org/abstracts/search?q=Danilo%20Villanueva"> Danilo Villanueva</a>, <a href="https://publications.waset.org/abstracts/search?q=Pedro%20Iv%C3%A1n%20Alvarez"> Pedro Iván Alvarez</a>, <a href="https://publications.waset.org/abstracts/search?q=Francisco%20Cubillos"> Francisco Cubillos</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Biodrying aims at removing water from biowastes and has been mostly studied for municipal solid wastes (MSW), while few studies have dealt with secondary sludge from the paper and pulp industry. The goal of this study was to investigate the effect of initial moisture content (MC) on the batch biodrying of pulp and paper secondary sludge, using rice husks as bulking agents. Three initial MCs were studied (54, 65, and 74% w.b.) in closed batch laboratory-scale reactors under adiabatic conditions and with a constant air-flow rate (0.65 l min-1 kg-1 wet solid). The initial MC of the mixture of secondary sludge and rice husks showed a significant effect on the biodrying process. Using initial moisture content between 54-65% w.b., the solid moisture content was reduce up to 37 % w.b. in ten days, getting calorific values between 8000-9000 kJ kg-1. It was concluded that a decreasing of initial MC improves the drying rate and decreases the solid volatile consumption, therefore, the optimization of biodrying should consider this parameter. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biodrying" title="biodrying">biodrying</a>, <a href="https://publications.waset.org/abstracts/search?q=secondary%20sludge" title=" secondary sludge"> secondary sludge</a>, <a href="https://publications.waset.org/abstracts/search?q=initial%20moisture%20content" title=" initial moisture content"> initial moisture content</a>, <a href="https://publications.waset.org/abstracts/search?q=pulp%20and%20paper%20industry" title=" pulp and paper industry"> pulp and paper industry</a>, <a href="https://publications.waset.org/abstracts/search?q=rice%20husk" title=" rice husk "> rice husk </a> </p> <a href="https://publications.waset.org/abstracts/18173/batch-biodrying-of-pulp-and-paper-secondary-sludge-influence-of-initial-moisture-content-on-the-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18173.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">509</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">59</span> Solvent Extraction in Ionic Liquids: Structuration and Aggregation Effects on Extraction Mechanisms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sandrine%20Dourdain">Sandrine Dourdain</a>, <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Lopez"> Cesar Lopez</a>, <a href="https://publications.waset.org/abstracts/search?q=Tamir%20Sukhbaatar"> Tamir Sukhbaatar</a>, <a href="https://publications.waset.org/abstracts/search?q=Guilhem%20Arrachart"> Guilhem Arrachart</a>, <a href="https://publications.waset.org/abstracts/search?q=Stephane%20Pellet-Rostaing"> Stephane Pellet-Rostaing</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A promising challenge in solvent extraction is to replace the conventional organic solvents, with ionic liquids (IL). Depending on the extraction systems, these new solvents show better efficiency than the conventional ones. Although some assumptions based on ions exchanges have been proposed in the literature, these properties are not predictable because the involved mechanisms are still poorly understood. It is well established that the mechanisms underlying solvent extraction processes are based not only on the molecular chelation of the extractant molecules but also on their ability to form supra-molecular aggregates due to their amphiphilic nature. It is therefore essential to evaluate how IL affects the aggregation properties of the extractant molecules. Our aim is to evaluate the influence of IL structure and polarity on solvent extraction mechanisms, by looking at the aggregation of the extractant molecules in IL. We compare extractant systems that are well characterized in common solvents and show thanks to SAXS and SANS measurements, that in the absence of IL ion exchange mechanisms, extraction properties are related to aggregation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solvent%20extraction%20in%20Ionic%20liquid" title="solvent extraction in Ionic liquid">solvent extraction in Ionic liquid</a>, <a href="https://publications.waset.org/abstracts/search?q=aggregation" title=" aggregation"> aggregation</a>, <a href="https://publications.waset.org/abstracts/search?q=Ionic%20liquids%20structure" title=" Ionic liquids structure"> Ionic liquids structure</a>, <a href="https://publications.waset.org/abstracts/search?q=SAXS" title=" SAXS"> SAXS</a>, <a href="https://publications.waset.org/abstracts/search?q=SANS" title=" SANS"> SANS</a> </p> <a href="https://publications.waset.org/abstracts/107612/solvent-extraction-in-ionic-liquids-structuration-and-aggregation-effects-on-extraction-mechanisms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107612.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">156</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">58</span> Wireless Sensor Networks for Water Quality Monitoring: Prototype Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cesar%20Eduardo%20Hern%C3%A1ndez%20Curiel">Cesar Eduardo Hernández Curiel</a>, <a href="https://publications.waset.org/abstracts/search?q=Victor%20Hugo%20Ben%C3%ADtez%20Baltazar"> Victor Hugo Benítez Baltazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Jes%C3%BAs%20Horacio%20Pacheco%20Ram%C3%ADrez"> Jesús Horacio Pacheco Ramírez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper is devoted to present the advances in the design of a prototype that is able to supervise the complex behavior of water quality parameters such as pH and temperature, via a real-time monitoring system. The current water quality tests that are performed in government water quality institutions in Mexico are carried out in problematic locations and they require taking manual samples. The water samples are then taken to the institution laboratory for examination. In order to automate this process, a water quality monitoring system based on wireless sensor networks is proposed. The system consists of a sensor node which contains one pH sensor, one temperature sensor, a microcontroller, and a ZigBee radio, and a base station composed by a ZigBee radio and a PC. The progress in this investigation shows the development of a water quality monitoring system. Due to recent events that affected water quality in Mexico, the main motivation of this study is to address water quality monitoring systems, so in the near future, a more robust, affordable, and reliable system can be deployed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pH%20measurement" title="pH measurement">pH measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20quality%20monitoring" title=" water quality monitoring"> water quality monitoring</a>, <a href="https://publications.waset.org/abstracts/search?q=wireless%20sensor%20networks" title=" wireless sensor networks"> wireless sensor networks</a>, <a href="https://publications.waset.org/abstracts/search?q=ZigBee" title=" ZigBee"> ZigBee</a> </p> <a href="https://publications.waset.org/abstracts/43281/wireless-sensor-networks-for-water-quality-monitoring-prototype-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43281.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">404</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">57</span> Evaluation of Water Quality on the Strength of Simple Concrete: Case Study of Wells in Jipijapa, Manabí, Ecuador</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Julio%20Cesar%20Pino%20Tarrag%C3%B3">Julio Cesar Pino Tarragó</a>, <a href="https://publications.waset.org/abstracts/search?q=Dunia%20Lisbet%20Dom%C3%ADnguez%20G%C3%A1lvez"> Dunia Lisbet Domínguez Gálvez</a>, <a href="https://publications.waset.org/abstracts/search?q=Luis%20Alfonso%20Moreno%20Ponce"> Luis Alfonso Moreno Ponce</a>, <a href="https://publications.waset.org/abstracts/search?q=Jhony%20Julio%20Regalado%20Jalca"> Jhony Julio Regalado Jalca</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study examines the impact of three distinct types of water on the compressive strength of plain concrete, focusing on samples from wells in Jipijapa, Manabí, Ecuador: Joa water, characterized by high sulfur content; Chade 1 water, with low sulfur content; and Chade 2 water, which is highly brackish. Compressive strength tests were conducted at 7, 14, and 28 days to assess the influence of these water types on the structural integrity of the concrete. The results indicate that both brackish and sulfur-rich water significantly reduces concrete strength, while Chade 1 water, though initially enhancing strength, displays variability in long-term performance. These outcomes underscore the importance of optimizing construction practices in regions like Jipijapa, where potable water is scarce, by exploring sustainable alternatives for using non-potable water, thereby conserving limited water resources. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title="compressive strength">compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=plain%20concrete" title=" plain concrete"> plain concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=sulfur%20water" title=" sulfur water"> sulfur water</a>, <a href="https://publications.waset.org/abstracts/search?q=brackish%20water" title=" brackish water"> brackish water</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20quality" title=" water quality"> water quality</a> </p> <a href="https://publications.waset.org/abstracts/189221/evaluation-of-water-quality-on-the-strength-of-simple-concrete-case-study-of-wells-in-jipijapa-manabi-ecuador" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/189221.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">35</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">56</span> The Impact of COVID-19 Pandemic on the Issue and Ideological Congruence of Trump and Bolsonaro Administrations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Flavio%20Contrera">Flavio Contrera</a>, <a href="https://publications.waset.org/abstracts/search?q=Paulo%20Cesar%20Gregorio"> Paulo Cesar Gregorio</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recent political developments and government control actions in the face of the COVID-19 pandemic draw attention to the contrast between the duties of government and the demands of democratic representation. Elected by mobilizing far-right issues, Trump and Bolsonaro moved away from the WHO guidelines but had to accommodate demands on the health and on the social protection system on the one hand and demands from the economic sector on the other. This study used the MARPOR Project method to assess the impact of the COVID-19 pandemic on the issue and ideological congruence between the electoral and governmental arena in both the Trump and Bolsonaro Administrations. Findings reveal issue congruence between arenas in "National Way of Life: Positive", "Law and Order," and "Technology and Infrastructure" for Donald Trump, and "Welfare State Expansion" for Bolsonaro. Ideological estimation results show that Trump and Bolsonaro positioned to the right in their presidential elections, initially moved to the center-right. However, welfare policies actions at high frequency during the COVID-19 pandemic moved the ideological estimations of both governments to the center-left, despite their denial rhetoric. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=congruence" title="congruence">congruence</a>, <a href="https://publications.waset.org/abstracts/search?q=COVID-19" title=" COVID-19"> COVID-19</a>, <a href="https://publications.waset.org/abstracts/search?q=Donald%20Trump" title=" Donald Trump"> Donald Trump</a>, <a href="https://publications.waset.org/abstracts/search?q=Jair%20Bolsonaro" title=" Jair Bolsonaro"> Jair Bolsonaro</a> </p> <a href="https://publications.waset.org/abstracts/142854/the-impact-of-covid-19-pandemic-on-the-issue-and-ideological-congruence-of-trump-and-bolsonaro-administrations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142854.pdf" target="_blank" class="btn btn-primary 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