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Reyes</title> <meta name="description" content="Search results for: Gonzalo Reyes"> <meta name="keywords" content="Gonzalo Reyes"> <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 navbar-toggler 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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="Gonzalo Reyes"> <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> 91</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Gonzalo Reyes</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">91</span> Poisson Type Spherically Symmetric Spacetimes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Garc%C3%ADa-Reyes">Gonzalo García-Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Conformastat spherically symmetric exact solutions of Einstein's field equations representing matter distributions made of fluid both perfect and anisotropic from given solutions of Poisson's equation of Newtonian gravity are investigated. The approach is used in the construction of new relativistic models of thick spherical shells and three-component models of galaxies (bulge, disk, and dark matter halo), writing, in this case, the metric in cylindrical coordinates. In addition, the circular motion of test particles (rotation curves) along geodesics on the equatorial plane of matter configurations and the stability of the orbits against radial perturbations are studied. The models constructed satisfy all the energy conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=general%20relativity" title="general relativity">general relativity</a>, <a href="https://publications.waset.org/abstracts/search?q=exact%20solutions" title=" exact solutions"> exact solutions</a>, <a href="https://publications.waset.org/abstracts/search?q=spherical%20symmetry" title=" spherical symmetry"> spherical symmetry</a>, <a href="https://publications.waset.org/abstracts/search?q=galaxy" title=" galaxy"> galaxy</a>, <a href="https://publications.waset.org/abstracts/search?q=kinematics%20and%20dynamics" title=" kinematics and dynamics"> kinematics and dynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=dark%20matter" title=" dark matter"> dark matter</a> </p> <a href="https://publications.waset.org/abstracts/151913/poisson-type-spherically-symmetric-spacetimes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151913.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">87</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">90</span> Prediction of Structural Response of Reinforced Concrete Buildings Using Artificial Intelligence</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juan%20Boj%C3%B3rquez">Juan Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Henry%20E.%20Reyes"> Henry E. Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Ed%C3%A9n%20Boj%C3%B3rquez"> Edén Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar"> Alfredo Reyes-Salazar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper addressed the use of Artificial Intelligence to obtain the structural reliability of reinforced concrete buildings. For this purpose, artificial neuronal networks (ANN) are developed to predict seismic demand hazard curves. In order to have enough input-output data to train the ANN, a set of reinforced concrete buildings (low, mid, and high rise) are designed, then a probabilistic seismic hazard analysis is made to obtain the seismic demand hazard curves. The results are then used as input-output data to train the ANN in a feedforward backpropagation model. The predicted values of the seismic demand hazard curves found by the ANN are then compared. Finally, it is concluded that the computer time analysis is significantly lower and the predictions obtained from the ANN were accurate in comparison to the values obtained from the conventional methods. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=structural%20reliability" title="structural reliability">structural reliability</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20design" title=" seismic design"> seismic design</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20learning" title=" machine learning"> machine learning</a>, <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20network" title=" artificial neural network"> artificial neural network</a>, <a href="https://publications.waset.org/abstracts/search?q=probabilistic%20seismic%20hazard%20analysis" title=" probabilistic seismic hazard analysis"> probabilistic seismic hazard analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20demand%20hazard%20curves" title=" seismic demand hazard curves"> seismic demand hazard curves</a> </p> <a href="https://publications.waset.org/abstracts/141596/prediction-of-structural-response-of-reinforced-concrete-buildings-using-artificial-intelligence" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141596.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">196</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">89</span> Direct Laser Fabrication and Characterization of Cu-Al-Ni Shape Memory Alloy for Seismic Damping Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Reyes">Gonzalo Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Magdalena%20Walczak"> Magdalena Walczak</a>, <a href="https://publications.waset.org/abstracts/search?q=Esteban%20Ramos-Moore"> Esteban Ramos-Moore</a>, <a href="https://publications.waset.org/abstracts/search?q=Jorge%20Ramos-Grez"> Jorge Ramos-Grez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metal additive manufacture technologies have gained strong support and acceptance as a promising and alternative method to manufacture high performance complex geometry products. The main purpose of the present work is to study the microstructure and phase transformation temperatures of Cu-Al-Ni shape memory alloys fabricated from a direct laser additive process using metallic powders as precursors. The potential application is to manufacture self-centering seismic dampers for earthquake protection of buildings out of a copper based alloy by an additive process. In this process, the Cu-Al-Ni alloy is melted, inside of a high temperature and vacuum chamber with the aid of a high power fiber laser under inert atmosphere. The laser provides the energy to melt the alloy powder layer. The process allows fabricating fully dense, oxygen-free Cu-Al-Ni specimens using different laser power levels, laser powder interaction times, furnace ambient temperatures, and cooling rates as well as modifying concentration of the alloying elements. Two sets of specimens were fabricated with a nominal composition of Cu-13Al-3Ni and Cu-13Al-4Ni in wt.%, however, semi-quantitative chemical analysis using EDX examination showed that the specimens’ resulting composition was closer to Cu-12Al-5Ni and Cu-11Al-8Ni, respectively. In spite of that fact, it is expected that the specimens should still possess shape memory behavior. To confirm this hypothesis, phase transformation temperatures will be measured using DSC technique, to look for martensitic and austenitic phase transformations at 150°C. So far, metallographic analysis of the specimens showed defined martensitic microstructures. Moreover, XRD technique revealed diffraction peaks corresponding to (0 0 18) and (1 2 8) planes, which are too associated with the presence of martensitic phase. We conclude that it would be possible to obtain fully dense Cu-Al-Ni alloys having shape memory effect behavior by direct laser fabrication process, and to advance into fabrication of self centering seismic dampers by a controllable metal additive manufacturing process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cu-Al-Ni%20alloys" title="Cu-Al-Ni alloys">Cu-Al-Ni alloys</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20laser%20fabrication" title=" direct laser fabrication"> direct laser fabrication</a>, <a href="https://publications.waset.org/abstracts/search?q=shape%20memory%20alloy" title=" shape memory alloy"> shape memory alloy</a>, <a href="https://publications.waset.org/abstracts/search?q=self-centering%20seismic%20dampers" title=" self-centering seismic dampers"> self-centering seismic dampers</a> </p> <a href="https://publications.waset.org/abstracts/26623/direct-laser-fabrication-and-characterization-of-cu-al-ni-shape-memory-alloy-for-seismic-damping-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26623.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">516</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">88</span> Selective Adsorption of Anionic Textile Dyes with Sustainable Composite Materials Based on Physically Activated Carbon and Basic Polyelectrolytes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mari%20Carmen%20Reyes%20Angeles">Mari Carmen Reyes Angeles</a>, <a href="https://publications.waset.org/abstracts/search?q=Dalia%20Michel%20Reyes%20Villeda"> Dalia Michel Reyes Villeda</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20Mar%C3%ADa%20Herrera%20Gonz%C3%A1lez"> Ana María Herrera González</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work reports the design and synthesis of two composite materials based on physically activated carbon and basic polyelectrolytes useful in the adsorption of textile dyes present in aqueous solutions and wastewater. The synthesis of basic polyelectrolytes poly(2-vinylpyridine) (P2VP) and poly(4-vinylpyridine) (P4VP) was made by means of free radical polymerization. The carbon made from prickly pear peel (CarTunaF) was thermally activated in the presence of combustion gases. Composite materials CarTunaF2VP and CarTunaF4VP were obtained from CarTunaF and polybasic polyelectrolytes P2VP and P4VP with a ratio of 67:33 wt. The structure of each polyelectrolyte, P2VP, and P4VP, was elucidated by means of the FTIR and 1H NMR spectrophotometric techniques. Their thermal stability was evaluated using TGA. The characterization of CarTunaF and composite materials CarTunaF2VP and CarTunaF4VP was made by means of FTIR, TGA, SEM, and N2 adsorption. The adsorptive capacities of the polyelectrolytes and the composite materials were evaluated by adsorption of direct dyes present in aqueous solutions. The polyelectrolytes removed between 90 and 100% of the dyes, and the composite materials removed between 68 and 93% of the dyes. Using the four adsorbents P2VP, P4VP, CarTuna2VP, and CarTuna4VP, it was observed that the dyes studied, Direct Blue 80, Direct Turquoise 86, and Direct Orange 26, were adsorbed in the range between 46.1 and 188.7mg∙g-1 by means of electrostatic interactions between the anionic groups in the dyes with the cationic groups in the adsorbents. By using adsorbent materials in the treatment of wastewater from the textile industry, an improvement in the quality of the water was observed by decreasing its pH, COD, conductivity, and color considerably <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=anionic%20dyes" title=" anionic dyes"> anionic dyes</a>, <a href="https://publications.waset.org/abstracts/search?q=composite" title=" composite"> composite</a>, <a href="https://publications.waset.org/abstracts/search?q=polyelectrolytes" title=" polyelectrolytes"> polyelectrolytes</a> </p> <a href="https://publications.waset.org/abstracts/152027/selective-adsorption-of-anionic-textile-dyes-with-sustainable-composite-materials-based-on-physically-activated-carbon-and-basic-polyelectrolytes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152027.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">100</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">87</span> A Game-Theory-Based Price-Optimization Algorithm for the Simulation of Markets Using Agent-Based Modelling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juan%20Manuel%20Sanchez-Cartas">Juan Manuel Sanchez-Cartas</a>, <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Leon"> Gonzalo Leon</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A price competition algorithm for ABMs based on game theory principles is proposed to deal with the simulation of theoretical market models. The algorithm is applied to the classical Hotelling’s model and to a two-sided market model to show it leads to the optimal behavior predicted by theoretical models. However, when theoretical models fail to predict the equilibrium, the algorithm is capable of reaching a feasible outcome. Results highlight that the algorithm can be implemented in other simulation models to guarantee rational users and endogenous optimal behaviors. Also, it can be applied as a tool of verification given that is theoretically based. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=agent-based%20models" title="agent-based models">agent-based models</a>, <a href="https://publications.waset.org/abstracts/search?q=algorithmic%20game%20theory" title=" algorithmic game theory"> algorithmic game theory</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-sided%20markets" title=" multi-sided markets"> multi-sided markets</a>, <a href="https://publications.waset.org/abstracts/search?q=price%20optimization" title=" price optimization"> price optimization</a> </p> <a href="https://publications.waset.org/abstracts/59770/a-game-theory-based-price-optimization-algorithm-for-the-simulation-of-markets-using-agent-based-modelling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59770.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">86</span> Design of DNA Origami Structures Using LAMP Products as a Combined System for the Detection of Extended Spectrum B-Lactamases</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kalaumari%20Mayoral-Pe%C3%B1a">Kalaumari Mayoral-Peña</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20I.%20Montejano-Montelongo"> Ana I. Montejano-Montelongo</a>, <a href="https://publications.waset.org/abstracts/search?q=Josu%C3%A9%20Reyes-Mu%C3%B1oz"> Josué Reyes-Muñoz</a>, <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20A.%20Ortiz-Mancilla"> Gonzalo A. Ortiz-Mancilla</a>, <a href="https://publications.waset.org/abstracts/search?q=Mayrin%20Rodr%C3%ADguez-Cruz"> Mayrin Rodríguez-Cruz</a>, <a href="https://publications.waset.org/abstracts/search?q=V%C3%ADctor%20Hern%C3%A1ndez-Villalobos"> Víctor Hernández-Villalobos</a>, <a href="https://publications.waset.org/abstracts/search?q=Jes%C3%BAs%20A.%20Guzm%C3%A1n-L%C3%B3pez"> Jesús A. Guzmán-López</a>, <a href="https://publications.waset.org/abstracts/search?q=Santiago%20Garc%C3%ADa-Jacobo"> Santiago García-Jacobo</a>, <a href="https://publications.waset.org/abstracts/search?q=Iv%C3%A1n%20Licona-V%C3%A1zquez"> Iván Licona-Vázquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Grisel%20Fierros-Romero"> Grisel Fierros-Romero</a>, <a href="https://publications.waset.org/abstracts/search?q=Rosario%20Flores-Vallejo"> Rosario Flores-Vallejo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The group B-lactamic antibiotics include some of the most frequently used small drug molecules against bacterial infections. Nevertheless, an alarming decrease in their efficacy has been reported due to the emergence of antibiotic-resistant bacteria. Infections caused by bacteria expressing extended Spectrum B-lactamases (ESBLs) are difficult to treat and account for higher morbidity and mortality rates, delayed recovery, and high economic burden. According to the Global Report on Antimicrobial Resistance Surveillance, it is estimated that mortality due to resistant bacteria will ascend to 10 million cases per year worldwide. These facts highlight the importance of developing low-cost and readily accessible detection methods of drug-resistant ESBLs bacteria to prevent their spread and promote accurate and fast diagnosis. Bacterial detection is commonly done using molecular diagnostic techniques, where PCR stands out for its high performance. However, this technique requires specialized equipment not available everywhere, is time-consuming, and has a high cost. Loop-Mediated Isothermal Amplification (LAMP) is an alternative technique that works at a constant temperature, significantly decreasing the equipment cost. It yields double-stranded DNA of several lengths with repetitions of the target DNA sequence as a product. Although positive and negative results from LAMP can be discriminated by colorimetry, fluorescence, and turbidity, there is still a large room for improvement in the point-of-care implementation. DNA origami is a technique that allows the formation of 3D nanometric structures by folding a large single-stranded DNA (scaffold) into a determined shape with the help of short DNA sequences (staples), which hybridize with the scaffold. This research aimed to generate DNA origami structures using LAMP products as scaffolds to improve the sensitivity to detect ESBLs in point-of-care diagnosis. For this study, the coding sequence of the CTM-X-15 ESBL of E. coli was used to generate the LAMP products. The set of LAMP primers were designed using PrimerExplorerV5. As a result, a target sequence of 200 nucleotides from CTM-X-15 ESBL was obtained. Afterward, eight different DNA origami structures were designed using the target sequence in the SDCadnano and analyzed with CanDo to evaluate the stability of the 3D structures. The designs were constructed minimizing the total number of staples to reduce costs and complexity for point-of-care applications. After analyzing the DNA origami designs, two structures were selected. The first one was a zig-zag flat structure, while the second one was a wall-like shape. Given the sequence repetitions in the scaffold sequence, both were able to be assembled with only 6 different staples each one, ranging between 18 to 80 nucleotides. Simulations of both structures were performed using scaffolds of different sizes yielding stable structures in all the cases. The generation of the LAMP products were tested by colorimetry and electrophoresis. The formation of the DNA structures was analyzed using electrophoresis and colorimetry. The modeling of novel detection methods through bioinformatics tools allows reliable control and prediction of results. To our knowledge, this is the first study that uses LAMP products and DNA-origami in combination to delect ESBL-producing bacterial strains, which represent a promising methodology for diagnosis in the point-of-care. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=beta-lactamases" title="beta-lactamases">beta-lactamases</a>, <a href="https://publications.waset.org/abstracts/search?q=antibiotic%20resistance" title=" antibiotic resistance"> antibiotic resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=DNA%20origami" title=" DNA origami"> DNA origami</a>, <a href="https://publications.waset.org/abstracts/search?q=isothermal%20amplification" title=" isothermal amplification"> isothermal amplification</a>, <a href="https://publications.waset.org/abstracts/search?q=LAMP%20technique" title=" LAMP technique"> LAMP technique</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20diagnosis" title=" molecular diagnosis"> molecular diagnosis</a> </p> <a href="https://publications.waset.org/abstracts/142416/design-of-dna-origami-structures-using-lamp-products-as-a-combined-system-for-the-detection-of-extended-spectrum-b-lactamases" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142416.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">222</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">85</span> A Proof of the N. Davydov Theorem for Douglis Algebra Valued Functions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jean-Marie%20Vilaire">Jean-Marie Vilaire</a>, <a href="https://publications.waset.org/abstracts/search?q=Ricardo%20Abreu-Blaya"> Ricardo Abreu-Blaya</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan%20Bory-Reyes"> Juan Bory-Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The classical Beltrami system of elliptic equations generalizes the Cauchy Riemann equation in the complex plane and offers the possibility to consider homogeneous system with no terms of zero order. The theory of Douglis-valued functions, called Hyper-analytic functions, is special case of the above situation. In this note, we prove an analogue of the N. Davydov theorem in the framework of the theory of hyperanalytic functions. The used methodology contemplates characteristic methods of the hypercomplex analysis as well as the singular integral operators and elliptic systems of the partial differential equations theories. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Beltrami%20equation" title="Beltrami equation">Beltrami equation</a>, <a href="https://publications.waset.org/abstracts/search?q=Douglis%20algebra-valued%20function" title=" Douglis algebra-valued function"> Douglis algebra-valued function</a>, <a href="https://publications.waset.org/abstracts/search?q=Hypercomplex%20Cauchy%20type%20integral" title=" Hypercomplex Cauchy type integral"> Hypercomplex Cauchy type integral</a>, <a href="https://publications.waset.org/abstracts/search?q=Sokhotski-Plemelj%20formulae" title=" Sokhotski-Plemelj formulae"> Sokhotski-Plemelj formulae</a> </p> <a href="https://publications.waset.org/abstracts/92078/a-proof-of-the-n-davydov-theorem-for-douglis-algebra-valued-functions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92078.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">250</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> Automatic Threshold Search for Heat Map Based Feature Selection: A Cancer Dataset Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Huertas">Carlos Huertas</a>, <a href="https://publications.waset.org/abstracts/search?q=Reyes%20Juarez-Ramirez"> Reyes Juarez-Ramirez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Public health is one of the most critical issues today; therefore, there is great interest to improve technologies in the area of diseases detection. With machine learning and feature selection, it has been possible to aid the diagnosis of several diseases such as cancer. In this work, we present an extension to the Heat Map Based Feature Selection algorithm, this modification allows automatic threshold parameter selection that helps to improve the generalization performance of high dimensional data such as mass spectrometry. We have performed a comparison analysis using multiple cancer datasets and compare against the well known Recursive Feature Elimination algorithm and our original proposal, the results show improved classification performance that is very competitive against current techniques. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biomarker%20discovery" title="biomarker discovery">biomarker discovery</a>, <a href="https://publications.waset.org/abstracts/search?q=cancer" title=" cancer"> cancer</a>, <a href="https://publications.waset.org/abstracts/search?q=feature%20selection" title=" feature selection"> feature selection</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20spectrometry" title=" mass spectrometry"> mass spectrometry</a> </p> <a href="https://publications.waset.org/abstracts/46310/automatic-threshold-search-for-heat-map-based-feature-selection-a-cancer-dataset-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46310.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">338</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> Make Up Flash: Web Application for the Improvement of Physical Appearance in Images Based on Recognition Methods</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Stefania%20Arguelles%20Reyes">Stefania Arguelles Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Octavio%20Jos%C3%A9%20Salcedo%20Parra"> Octavio José Salcedo Parra</a>, <a href="https://publications.waset.org/abstracts/search?q=Alberto%20Acosta%20L%C3%B3pez"> Alberto Acosta López</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a web application for the improvement of images through recognition. The web application is based on the analysis of picture-based recognition methods that allow an improvement on the physical appearance of people posting in social networks. The basis relies on the study of tools that can correct or improve some features of the face, with the help of a wide collection of user images taken as reference to build a facial profile. Automatic facial profiling can be achieved with a deeper study of the Object Detection Library. It was possible to improve the initial images with the help of MATLAB and its filtering functions. The user can have a direct interaction with the program and manually adjust his preferences. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Matlab" title="Matlab">Matlab</a>, <a href="https://publications.waset.org/abstracts/search?q=make%20up" title=" make up"> make up</a>, <a href="https://publications.waset.org/abstracts/search?q=recognition%20methods" title=" recognition methods"> recognition methods</a>, <a href="https://publications.waset.org/abstracts/search?q=web%20application" title=" web application"> web application</a> </p> <a href="https://publications.waset.org/abstracts/108091/make-up-flash-web-application-for-the-improvement-of-physical-appearance-in-images-based-on-recognition-methods" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108091.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">144</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> Implementation of Lean Manufacturing in Some Companies in Colombia: A Case Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Natalia%20Marulanda">Natalia Marulanda</a>, <a href="https://publications.waset.org/abstracts/search?q=Henry%20Gonz%C3%A1lez"> Henry González</a>, <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Le%C3%B3n"> Gonzalo León</a>, <a href="https://publications.waset.org/abstracts/search?q=Alejandro%20Hincapi%C3%A9"> Alejandro Hincapié</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Continuous improvement tools are the result of a set of studies that developed theories and methodologies. These methodologies enable organizations to increase their levels of efficiency, effectiveness, and productivity. Based on these methodologies, lean manufacturing philosophy, which is based on the optimization of resources, waste disposal, and generation of value to products and services, was developed. Lean application has been massive globally, but Colombian companies have been made it incipiently. Therefore, the purpose of this article is to identify the impacts generated by the implementation of lean manufacturing tools in five companies located in Colombia and Medellín metropolitan area. It also seeks to make a comparison of the results obtained from the implementation of lean philosophy and Theory of Constraints. The methodology is qualitative and quantitative, is based on the case study interview from dialogue with the leaders of the processes that used lean tools. The most used tools by research companies are 5's with 100% and TPM with 80%. The less used tool is the synchronous production with 20%. The main reason for the implementation of lean was supply chain management with 83.3%. For the application of lean and TOC, we did not find significant differences between the impact, in terms of methodology, areas of application, staff initiatives, supply chain management, planning, and training. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=business%20strategy" title="business strategy">business strategy</a>, <a href="https://publications.waset.org/abstracts/search?q=lean%20manufacturing" title=" lean manufacturing"> lean manufacturing</a>, <a href="https://publications.waset.org/abstracts/search?q=theory%20of%20constraints" title=" theory of constraints"> theory of constraints</a>, <a href="https://publications.waset.org/abstracts/search?q=supply%20chain" title=" supply chain"> supply chain</a> </p> <a href="https://publications.waset.org/abstracts/43186/implementation-of-lean-manufacturing-in-some-companies-in-colombia-a-case-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43186.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">354</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> Comparison of the Seismic Response of Planar Regular and Irregular Steel Frames</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Robespierre%20Chavez">Robespierre Chavez</a>, <a href="https://publications.waset.org/abstracts/search?q=Eden%20Bojorquez"> Eden Bojorquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar"> Alfredo Reyes-Salazar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study compares the seismic response of regular and vertically irregular steel frames determined by nonlinear time history analysis and by using several sets of earthquake records, which are divided in two categories: The first category having 20 stiff-soil ground motion records obtained from the NGA database, and the second category having 30 soft-soil ground motions recorded in the Lake Zone of Mexico City and exhibiting a dominant period (Ts) of two seconds. The steel frames in both format regular and irregular were designed according to the Mexico City Seismic Design Provisions (MCSDP). The effects of irregularity throught the height on the maximum interstory drifts are estimated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=irregular%20steel%20frames" title="irregular steel frames">irregular steel frames</a>, <a href="https://publications.waset.org/abstracts/search?q=maximum%20interstory%20drifts" title=" maximum interstory drifts"> maximum interstory drifts</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20response" title=" seismic response"> seismic response</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20records" title=" seismic records"> seismic records</a> </p> <a href="https://publications.waset.org/abstracts/42693/comparison-of-the-seismic-response-of-planar-regular-and-irregular-steel-frames" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42693.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">327</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> Musical Tesla Coil Controlled by an Audio Signal Processed in Matlab</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sandra%20Cuenca">Sandra Cuenca</a>, <a href="https://publications.waset.org/abstracts/search?q=Danilo%20Santana"> Danilo Santana</a>, <a href="https://publications.waset.org/abstracts/search?q=Anderson%20Reyes"> Anderson Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The following project is based on the manipulation of audio signals through the Matlab software, which has an audio signal that is modified, and its resultant obtained through the auxiliary port of the computer is passed through a signal amplifier whose amplified signal is connected to a tesla coil which has a behavior like a vumeter, the flashes at the output of the tesla coil increase and decrease its intensity depending on the audio signal in the computer and also the voltage source from which it is sent. The amplified signal then passes to the tesla coil being shown in the plasma sphere with the respective flashes; this activation is given through the specified parameters that we want to give in the MATLAB algorithm that contains the digital filters for the manipulation of our audio signal sent to the tesla coil to be displayed in a plasma sphere with flashes of the combination of colors commonly pink and purple that varies according to the tone of the song. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=auxiliary%20port" title="auxiliary port">auxiliary port</a>, <a href="https://publications.waset.org/abstracts/search?q=tesla%20coil" title=" tesla coil"> tesla coil</a>, <a href="https://publications.waset.org/abstracts/search?q=vumeter" title=" vumeter"> vumeter</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20sphere" title=" plasma sphere"> plasma sphere</a> </p> <a href="https://publications.waset.org/abstracts/170874/musical-tesla-coil-controlled-by-an-audio-signal-processed-in-matlab" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/170874.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">79</span> Role of Physiotherapist: How Their Job and Working Area Could Be Known</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juan%20Pablo%20Hervas-Perez">Juan Pablo Hervas-Perez</a>, <a href="https://publications.waset.org/abstracts/search?q=Jesus%20Guodemar-Perez"> Jesus Guodemar-Perez</a>, <a href="https://publications.waset.org/abstracts/search?q=Montserrat%20Ruiz-Lopez"> Montserrat Ruiz-Lopez</a>, <a href="https://publications.waset.org/abstracts/search?q=Elena%20Sonsoles%20Rodriguez-Lopez"> Elena Sonsoles Rodriguez-Lopez</a>, <a href="https://publications.waset.org/abstracts/search?q=Noemi%20Mayoral-Gonzalo"> Noemi Mayoral-Gonzalo</a>, <a href="https://publications.waset.org/abstracts/search?q=Eduardo%20Cimadevilla%20Fernandez-Pola"> Eduardo Cimadevilla Fernandez-Pola</a>, <a href="https://publications.waset.org/abstracts/search?q=Mario%20Caballero-Corella"> Mario Caballero-Corella</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Physiotherapy is a healthcare discipline that covers many fields of action within the recovery and prevention of health. Some are well known, but others, such as working with newborns and premature children are not so. Physical therapist functions are well defined, but the impression of the population is that there are other professionals who can develop them, and a large part are unknown. Objective: To evaluate the level of knowledge of the sample on the role of the physiotherapist in general, and more specifically in the neonatal intensive care (NICU) units, and estimate your level of notions on the development centered care (DCC). Method: A descriptive, transversal, observational and prospective study developed on a 125 participants' sample. Results: From the sample studied, 87.2% had already had contact with physiotherapy previously. An 80.9% believed that the physiotherapist intervention was decisive for the cure, and 84.0% would recommend physiotherapy treatment to others. Of the total surveyed, 98.0% felt that the physiotherapist is who should run the physiotherapeutic treatments, but shares with other professions 71.0% of votes. The field's best-known work is rehabilitation (94.0%); Neonatology is on the 4th place (66.0% of votes). Conclusions: Many areas of work of physical therapy are unknown to a big part of the population, including the own health workers. Less than half of the sample meets the DCC, and only 58% of the interviewed physiotherapists know them. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=functions%20of%20physiotherapist" title="functions of physiotherapist">functions of physiotherapist</a>, <a href="https://publications.waset.org/abstracts/search?q=neonatal%20intensive%20care" title=" neonatal intensive care"> neonatal intensive care</a>, <a href="https://publications.waset.org/abstracts/search?q=physiotherapy" title=" physiotherapy"> physiotherapy</a>, <a href="https://publications.waset.org/abstracts/search?q=prematurity" title=" prematurity"> prematurity</a> </p> <a href="https://publications.waset.org/abstracts/55397/role-of-physiotherapist-how-their-job-and-working-area-could-be-known" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55397.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">330</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> Nonuniformity Correction Technique in Infrared Video Using Feedback Recursive Least Square Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Flavio%20O.%20Torres">Flavio O. Torres</a>, <a href="https://publications.waset.org/abstracts/search?q=Maria%20J.%20Castilla"> Maria J. Castilla</a>, <a href="https://publications.waset.org/abstracts/search?q=Rodrigo%20A.%20Augsburger"> Rodrigo A. Augsburger</a>, <a href="https://publications.waset.org/abstracts/search?q=Pedro%20I.%20Cachana"> Pedro I. Cachana</a>, <a href="https://publications.waset.org/abstracts/search?q=Katherine%20S.%20Reyes"> Katherine S. Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we present a scene-based nonuniformity correction method using a modified recursive least square algorithm with a feedback system on the updates. The feedback is designed to remove impulsive noise contamination images produced by a recursive least square algorithm by measuring the output of the proposed algorithm. The key advantage of the method is based on its capacity to estimate detectors parameters and then compensate for impulsive noise contamination image in a frame by frame basics. We define the algorithm and present several experimental results to demonstrate the efficacy of the proposed method in comparison to several previously published recursive least square-based methods. We show that the proposed method removes impulsive noise contamination image. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=infrared%20focal%20plane%20arrays" title="infrared focal plane arrays">infrared focal plane arrays</a>, <a href="https://publications.waset.org/abstracts/search?q=infrared%20imaging" title=" infrared imaging"> infrared imaging</a>, <a href="https://publications.waset.org/abstracts/search?q=least%20mean%20square" title=" least mean square"> least mean square</a>, <a href="https://publications.waset.org/abstracts/search?q=nonuniformity%20correction" title=" nonuniformity correction"> nonuniformity correction</a> </p> <a href="https://publications.waset.org/abstracts/131681/nonuniformity-correction-technique-in-infrared-video-using-feedback-recursive-least-square-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/131681.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">143</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> Impact of Slenderness Ratios on the Seismic Behavior of Reinforced Concrete Buildings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Juan%20Boj%C3%B3rquez">Juan Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20de%20Jes%C3%BAs%20Merino"> F. de Jesús Merino</a>, <a href="https://publications.waset.org/abstracts/search?q=Ed%C3%A9n%20Boj%C3%B3rquez"> Edén Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Mario%20Llanez-Tizoc"> Mario Llanez-Tizoc</a>, <a href="https://publications.waset.org/abstracts/search?q=Federico%20Valenzuela-Beltr%C3%A1n"> Federico Valenzuela-Beltrán</a>, <a href="https://publications.waset.org/abstracts/search?q=Mario%20R.%20Flores"> Mario R. Flores</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Ram%C3%B3n%20Gaxiola-Camacho"> J. Ramón Gaxiola-Camacho</a>, <a href="https://publications.waset.org/abstracts/search?q=Henry%20Reyes"> Henry Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As urban populations continue to grow, the demand for higher housing density in large cities has led to increased use of slender buildings to maximize limited land availability. However, structures with high slenderness ratios face significant challenges related to their resistance capacity and lateral stiffness, particularly in seismic conditions. This study evaluates the seismic behavior of four reinforced concrete frame buildings with varying slenderness ratios situated on soft soil in Mexico City. Utilizing step-by-step nonlinear dynamic analysis, the research compares the seismic performance of these buildings, presenting detailed results, conclusions, and recommendations for enhancing the earthquake resistance of slender structures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dynamic%20analysis" title="dynamic analysis">dynamic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20buildings" title=" reinforced concrete buildings"> reinforced concrete buildings</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20behavior" title=" seismic behavior"> seismic behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=slenderness%20ratio" title=" slenderness ratio"> slenderness ratio</a> </p> <a href="https://publications.waset.org/abstracts/192079/impact-of-slenderness-ratios-on-the-seismic-behavior-of-reinforced-concrete-buildings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192079.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">24</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> Navigating Safety Horizons: A Qualitative Exploration of Jobsite Safety Orientations in the US Construction Industry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roxana%20Poushang%20Baghery">Roxana Poushang Baghery</a>, <a href="https://publications.waset.org/abstracts/search?q=Matthew%20D.%20Reyes"> Matthew D. Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a comprehensive investigation into jobsite safety orientation programs within the US construction industry. Through interviews with industry professionals, this paper explores the domains of safety roles, daily safety practices, safety culture, and experts’ insights. This study underscores the pivotal significance of safety orientation programs, addressing their content, coordination, technology integration, and emergency procedures. Key findings emphasize the influential roles of leadership, language, and technology in the enhancement of these programs. Advocating for a paradigm shift, this paper calls for a multifaceted approach rooted in engagement, leadership commitment, clear communication, technological integration, simplicity, and a persistent pursuit of improvement in safety orientations. This study significantly contributes to the ongoing evolution and enhancement of safety practices, ensuring the safety and success of construction projects and, above all, the safeguarding of its workforce. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=jobsite%20safety%20orientation" title="jobsite safety orientation">jobsite safety orientation</a>, <a href="https://publications.waset.org/abstracts/search?q=construction%20industry" title=" construction industry"> construction industry</a>, <a href="https://publications.waset.org/abstracts/search?q=safety%20culture" title=" safety culture"> safety culture</a>, <a href="https://publications.waset.org/abstracts/search?q=workplace%20incidents" title=" workplace incidents"> workplace incidents</a> </p> <a href="https://publications.waset.org/abstracts/181641/navigating-safety-horizons-a-qualitative-exploration-of-jobsite-safety-orientations-in-the-us-construction-industry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/181641.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">75</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> Board of Directors of Small and Medium-Sized Enterprises to Go Public: Characteristics and Moderating Factors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mar%C3%ADa-Jos%C3%A9%20Palacin-Sanchez">María-José Palacin-Sanchez</a>, <a href="https://publications.waset.org/abstracts/search?q=Filippo%20Di%20Pietro"> Filippo Di Pietro</a>, <a href="https://publications.waset.org/abstracts/search?q=Reyes%20Samaniego-Medina"> Reyes Samaniego-Medina</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article examines, in an institutional context such as Spanish one, the corporate board structure characteristics and determinants in entrepreneurial firms to go public. Specifically, it explores these issues through all the initial public offerings in the Spanish Alternative Equity Market (MAB), which is a market segment for smaller growing companies. The results show that: a) firm size, age of the company, and the reputation of the auditor and the nominated advisor and Corporate Governance Code favour a larger and more independent board structure that enhances its monitoring functions; and b) leverage, opportunities of growth, sector risk and ownership by executive directors all lead towards a smaller broad of directors where the role of entrepreneurship provided by executive directors remains crucial. This reflects the delicate balance of power between small-business entrepreneurs and financial equity market forces, which demand more transparency and monitoring in the companies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=board%20composition" title="board composition">board composition</a>, <a href="https://publications.waset.org/abstracts/search?q=board%20size" title=" board size"> board size</a>, <a href="https://publications.waset.org/abstracts/search?q=corporate%20governance" title=" corporate governance"> corporate governance</a>, <a href="https://publications.waset.org/abstracts/search?q=IPO" title=" IPO"> IPO</a>, <a href="https://publications.waset.org/abstracts/search?q=SMEs" title=" SMEs"> SMEs</a> </p> <a href="https://publications.waset.org/abstracts/65556/board-of-directors-of-small-and-medium-sized-enterprises-to-go-public-characteristics-and-moderating-factors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65556.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">400</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> Street Art Lenses: A Glimpse into the Street Artists’ Identity and Socio-Political Perspective in Brussels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Francisco%20Urrutia%20Reyes">José Francisco Urrutia Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Judith%20Espinosa%20Real"> Judith Espinosa Real</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper is meant to re-examine the role of street art in the contemporary world. By studying this form of art in Brussels, it can be explained how murals show the socio-political reality of a given community and influence on its interaction. Through the definitions of street art, murals and street artists, and analysing their role in Brussels, it is possible to understand how this counter culture movement serves as an engine of social development, as it interacts with its surroundings sending a clear message to a wider audience. Street art impacts on its environment because it interacts with the people who occupies the day-to-day public space. This has proven to be effective in the arouse of social consciousness, up to the point of being adopted by the government of Brussels to promote social movements such as the AIDS-HIV campaign along with the Plate-Forme Prévention Sida. It can be concluded that street art has evolved since its vandalic beginnings, to become a form of art that has not lost it counter official status, but now has a critical vision that can promote social awakening. Street art is now a global trend that uses visual inputs to create a positive impact. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=street%20art" title="street art">street art</a>, <a href="https://publications.waset.org/abstracts/search?q=Brussels" title=" Brussels"> Brussels</a>, <a href="https://publications.waset.org/abstracts/search?q=social%20impact" title=" social impact"> social impact</a>, <a href="https://publications.waset.org/abstracts/search?q=political%20perspective" title=" political perspective"> political perspective</a> </p> <a href="https://publications.waset.org/abstracts/22579/street-art-lenses-a-glimpse-into-the-street-artists-identity-and-socio-political-perspective-in-brussels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22579.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">362</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> Prediction of Maximum Inter-Story Drifts of Steel Frames Using Intensity Measures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ed%C3%A9n%20Boj%C3%B3rquez">Edén Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Victor%20Baca"> Victor Baca</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar"> Alfredo Reyes-Salazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Jorge%20Gonz%C3%A1lez"> Jorge González</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, simplified equations to predict maximum inter-story drift demands of steel framed buildings are proposed in terms of two ground motion intensity measures based on the acceleration spectral shape. For this aim, the maximum inter-story drifts of steel frames with 4, 6, 8 and 10 stories subjected to narrow-band ground motion records are estimated and compared with the spectral acceleration at first mode of vibration Sa(T1) which is commonly used in earthquake engineering and seismology, and with a new parameter related with the structural response known as INp. It is observed that INp is the parameter best related with the structural response of steel frames under narrow-band motions. Finally, equations to compute maximum inter-story drift demands of steel frames as a function of spectral acceleration and INp are proposed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=intensity%20measures" title="intensity measures">intensity measures</a>, <a href="https://publications.waset.org/abstracts/search?q=spectral%20shape" title=" spectral shape"> spectral shape</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20frames" title=" steel frames"> steel frames</a>, <a href="https://publications.waset.org/abstracts/search?q=peak%20demands" title=" peak demands"> peak demands</a> </p> <a href="https://publications.waset.org/abstracts/42810/prediction-of-maximum-inter-story-drifts-of-steel-frames-using-intensity-measures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42810.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">392</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> Reliability-Based Ductility Seismic Spectra of Structures with Tilting</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Federico%20Valenzuela-Beltran">Federico Valenzuela-Beltran</a>, <a href="https://publications.waset.org/abstracts/search?q=Sonia%20E.%20Ruiz"> Sonia E. Ruiz</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar"> Alfredo Reyes-Salazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan%20Bojorquez"> Juan Bojorquez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A reliability-based methodology which uses structural demand hazard curves to consider the increment of the ductility demands of structures with tilting is proposed. The approach considers the effect of two orthogonal components of the ground motions as well as the influence of soil-structure interaction. The approach involves the calculation of ductility demand hazard curves for symmetric systems and, alternatively, for systems with different degrees of asymmetry. To get this objective, demand hazard curves corresponding to different global ductility demands of the systems are calculated. Next, Uniform Exceedance Rate Spectra (UERS) are developed for a specific mean annual rate of exceedance value. Ratios between UERS corresponding to asymmetric and to symmetric systems located in soft soil of the valley of Mexico are obtained. Results indicate that the ductility demands corresponding to tilted structures may be several times higher than those corresponding to symmetric structures, depending on several factors such as tilting angle and vibration period of structure and soil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=asymmetric%20yielding" title="asymmetric yielding">asymmetric yielding</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20performance" title=" seismic performance"> seismic performance</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20reliability" title=" structural reliability"> structural reliability</a>, <a href="https://publications.waset.org/abstracts/search?q=tilted%20structures" title=" tilted structures"> tilted structures</a> </p> <a href="https://publications.waset.org/abstracts/22149/reliability-based-ductility-seismic-spectra-of-structures-with-tilting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22149.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">71</span> Amino Acid Responses of Wheat Cultivars under Glasshouse Drought Accurately Predict Yield-Based Drought Tolerance in the Field</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arun%20K.%20Yadav">Arun K. Yadav</a>, <a href="https://publications.waset.org/abstracts/search?q=Adam%20J.%20Carroll"> Adam J. Carroll</a>, <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20M.%20Estavillo"> Gonzalo M. Estavillo</a>, <a href="https://publications.waset.org/abstracts/search?q=Greg%20J.%20Rebetzke"> Greg J. Rebetzke</a>, <a href="https://publications.waset.org/abstracts/search?q=Barry%20J.%20Pogson"> Barry J. Pogson</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water limits crop productivity, so selecting for minimal yield-gap in drier environments is critical to mitigate against climate change and land-use pressures. To date, no markers measured in glasshouses have been reported to predict field-based drought tolerance. In the field, the best measure of drought tolerance is yield-gap; but this requires multisite trials that are an order of magnitude more resource intensive and can be impacted by weather variation. We investigated the responses of relative water content (RWC), stomatal conductance (gs), chlorophyll content and metabolites in flag leaves of commercial wheat (Triticum aestivum L.) cultivars to three drought treatments in the glasshouse and field environments. We observed strong genetic associations between glasshouse-based RWC, metabolites and Yield gap-based Drought Tolerance (YDT): the ratio of yield in water-limited versus well-watered conditions across 24 field environments spanning sites and seasons. Critically, RWC response to glasshouse drought was strongly associated with both YDT (r2 = 0.85, p < 8E-6) and RWC under field drought (r2 = 0.77, p < 0.05). Multiple regression analyses revealed that 98% of genetic YDT variance was explained by drought responses of four metabolites: serine, asparagine, methionine and lysine (R2 = 0.98; p < 0.01). Fitted coefficients suggested that, for given levels of serine and asparagine, stronger methionine and lysine accumulation was associated with higher YDT. Collectively, our results demonstrate that high-throughput, targeted metabolic phenotyping of glasshouse-grown plants may be an effective tool for the selection of wheat cultivars with high YDT in the field. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drought%20stress" title="drought stress">drought stress</a>, <a href="https://publications.waset.org/abstracts/search?q=grain%20yield" title=" grain yield"> grain yield</a>, <a href="https://publications.waset.org/abstracts/search?q=metabolomics" title=" metabolomics"> metabolomics</a>, <a href="https://publications.waset.org/abstracts/search?q=stomatal%20conductance" title=" stomatal conductance"> stomatal conductance</a>, <a href="https://publications.waset.org/abstracts/search?q=wheat" title=" wheat"> wheat</a> </p> <a href="https://publications.waset.org/abstracts/84496/amino-acid-responses-of-wheat-cultivars-under-glasshouse-drought-accurately-predict-yield-based-drought-tolerance-in-the-field" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84496.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">266</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> Antiproliferative Effect of Polyphenols from Crocus sativus L. Leaves on Human Colon Adenocarcinoma Cells (Caco-2)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Ortiz%20de%20Elguea-Culebras">Gonzalo Ortiz de Elguea-Culebras</a>, <a href="https://publications.waset.org/abstracts/search?q=Ra%C3%BAl%20S%C3%A1nchez-Vioquea"> Raúl Sánchez-Vioquea</a>, <a href="https://publications.waset.org/abstracts/search?q=Adela%20Mena-Morales"> Adela Mena-Morales</a>, <a href="https://publications.waset.org/abstracts/search?q=Manuel%20Alaiz"> Manuel Alaiz</a>, <a href="https://publications.waset.org/abstracts/search?q=Enrique%20Melero-Bravo"> Enrique Melero-Bravo</a>, <a href="https://publications.waset.org/abstracts/search?q=Esteban%20Garc%C3%ADa-Romero"> Esteban García-Romero</a>, <a href="https://publications.waset.org/abstracts/search?q=Javier%20Vioque"> Javier Vioque</a>, <a href="https://publications.waset.org/abstracts/search?q=Lourdes%20Marchante-Cuevas"> Lourdes Marchante-Cuevas</a>, <a href="https://publications.waset.org/abstracts/search?q=Julio%20Gir%C3%B3n-Calle"> Julio Girón-Calle</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Saffron (Crocus sativus L.) is a highly valued crop for the manufacture of spice that consists of the dried stigma of the flowers. This is in contrast to other underutilized parts of the saffron plant as leaves, which represent abundant biomass whose use might help to enhance the sustainability of the saffron crop. Saffron leaves contain significant amounts of phenolic compounds, 7.8 equivalent grams of gallic acid per 100g of extract, and are very promising compounds in terms of exploring novel uses of saffron leaves. Given that phenolic compounds have numerous effects on cancer-related biological pathways, we have investigated the in vitro antiproliferative effect of saffron leaf polyphenols against human colon adenocarcinoma cells (Caco-2). Polyphenols were extracted from leaves with 70% ethanol, defatted with hexane, and purified by solid phase extraction using C18 silica gel and then silica gel 60. Analysis of polyphenols was performed by HPLC-ESI-MS. Di-, tri-, and tetrahexosides of quercetin, kaempferol, and isorhamnetin, as well as C-hexosides like isoorientin and vitexin, were tentatively identified. Polyphenols strongly inhibited the proliferation of Caco-2 cells, which is consistent with model studies in which several of the polyphenols identified in saffron leaves have demonstrated their potential as chemopreventive agents in cancer. Due to the low profitability that saffron leaf currently represents, we consider these results very encouraging and that this by-product deserves further investigation as a potential source of active molecules against colorectal cancer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=saffron%20leaves" title="saffron leaves">saffron leaves</a>, <a href="https://publications.waset.org/abstracts/search?q=agricultural%20by-products" title=" agricultural by-products"> agricultural by-products</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenols" title=" polyphenols"> polyphenols</a>, <a href="https://publications.waset.org/abstracts/search?q=antiproliferative%20effect" title=" antiproliferative effect"> antiproliferative effect</a>, <a href="https://publications.waset.org/abstracts/search?q=human%20colon%20adenocarcinoma%20cells" title=" human colon adenocarcinoma cells"> human colon adenocarcinoma cells</a> </p> <a href="https://publications.waset.org/abstracts/141891/antiproliferative-effect-of-polyphenols-from-crocus-sativus-l-leaves-on-human-colon-adenocarcinoma-cells-caco-2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141891.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">94</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> Seismic Behavior of Three-Dimensional Steel Buildings with Post-Tensioned Connections</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manuel%20E.%20Soto-L%C3%B3pez">Manuel E. Soto-López</a>, <a href="https://publications.waset.org/abstracts/search?q=Israel%20Gaxiola-Avenda%C3%B1o"> Israel Gaxiola-Avendaño</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar"> Alfredo Reyes-Salazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Eden%20Boj%C3%B3rquez"> Eden Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Sonia%20E.%20Ruiz"> Sonia E. Ruiz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The seismic responses of steel buildings with semi-rigid post-tensioned connections (PC) are estimated and compared with those of steel buildings with typical rigid (welded) connections (RC). The comparison is made in terms of global and local response parameters. The results indicate that the seismic responses in terms of interstory shears, roof displacements, axial load and bending moments are smaller for the buildings with PC connection. The difference is larger for global than for local parameters, which in turn varies from one column location to another. The reason for this improved behavior is that the buildings with PC dissipate more hysteretic energy than those with RC. In addition, unlike the case of buildings with WC, for the PC structures the hysteretic energy is mostly dissipated at the connections, which implies that structural damage in beams and columns is not significant. According to this results, steel buildings with PC are a viable option in highseismicity areas because of their smaller response and self-centering connection capacity as well as the fact that brittle failure is avoided. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=inter-story%20drift" title="inter-story drift">inter-story drift</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20time-history%20analysis" title=" nonlinear time-history analysis"> nonlinear time-history analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=post-tensioned%20connections" title=" post-tensioned connections"> post-tensioned connections</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20buildings" title=" steel buildings"> steel buildings</a> </p> <a href="https://publications.waset.org/abstracts/18722/seismic-behavior-of-three-dimensional-steel-buildings-with-post-tensioned-connections" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18722.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">499</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> Advocating for Indigenous Music in Latin American Music Education</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Francisco%20Luis%20Reyes">Francisco Luis Reyes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> European colonization had a profound impact on Latin America. The influence of the old continent can be perceived in the culture, religion, and language of the region as well as the beliefs and attitudes of the population. Music education is not an exception to this phenomenon. With Europeans controlling cultural life and erecting educational institutions across the continent for several centuries, Western European Art Music (WEAM) has polarized music learning in formal spaces. In contrast, the musics from the indigenous population, the African slaves, and the ones that emerged as a result of the cultural mélanges have largely been excluded from primary and secondary schooling. The purpose of this paper is to suggest the inclusion of indigenous music education in primary and secondary music education. The paper employs a philosophical inquiry in order to achieve this aim. Philosophical inquiry seeks to uncover and examine individuals' unconscious beliefs, principles, values, and assumptions to envision potential possibilities. This involves identifying and describing issues within current music teaching and learning practices. High-quality philosophical research tackles problems that are sufficiently narrow (addressing a specific aspect of a single complex topic), realistic (reflecting the experiences of music education), and significant (addressing a widespread and timely issue). Consequently, this methodological approach fits this topic, as the research addresses the omnipresence of WEAM in Latin American music education, the exclusion of indigenous music, and argues about the transformational impact said artistic expressions can have on practices in the region. The paper initially addresses how WEAM became ubiquitous in the region by recounting historical events, and adressing the issues other types of music face entering higher education. According to Shifres and Rosabal-Coto (2017) Latin America still upholds the musical heritage of their colonial period, and its formal music education institutions promote the European ontology instilled during European expansion. In accordance, the work of Reyes and Lorenzo-Quiles (2024), and Soler, Lorenzo-Quiles, and Hargreaves (2014), demonstrate how music institutions in the region uphold foreign narratives. Their studies show that music programs in Puerto Rico and Colombia instruct students in WEAM as well as require skills in said art form to enter the profession, just like other authors have argued (Cain & Walden, 2019, Walden, 2016). Subsequently, the research explains the issues faced by prospective music educators that do not practice WEAM. Roberts (1991a, 1991b, 1993), Green (2012) have found that music education students that do not adhere to the musical culture of their institution, are less likely to finish their degrees. Hence, practicioners of tradional musics might feel out of place in the environment. The ubiquity of WEAM and the exclusion of traditional musics of the region, provide the primary challenges to the inclusion of indigenous musics in formal spaces in primary and secondary education. The presentation then laids the framework for the inclusion indigenous music, and conclusively offers examples of how the musical expressions from the continent can improove the music education practices of the region. As an ending, the article highlights the benefits of these musics that are lacking in current practices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=indigenous%20music%20education" title="indigenous music education">indigenous music education</a>, <a href="https://publications.waset.org/abstracts/search?q=postmodern%20music%20education" title=" postmodern music education"> postmodern music education</a>, <a href="https://publications.waset.org/abstracts/search?q=decolonization%20in%20music%20education" title=" decolonization in music education"> decolonization in music education</a>, <a href="https://publications.waset.org/abstracts/search?q=music%20education%20practice" title=" music education practice"> music education practice</a>, <a href="https://publications.waset.org/abstracts/search?q=Latin%20American%20music%20education" title=" Latin American music education"> Latin American music education</a> </p> <a href="https://publications.waset.org/abstracts/187661/advocating-for-indigenous-music-in-latin-american-music-education" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/187661.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">33</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> Education for Sustainability Using PBL on an Engineering Course at the National University of Colombia</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hern%C3%A1n%20G.%20Cort%C3%A9s-Mora">Hernán G. Cortés-Mora</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20I.%20P%C3%A9na-Reyes"> José I. Péna-Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfonso%20Herrera-Jim%C3%A9nez"> Alfonso Herrera-Jiménez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This article describes the implementation experience of Project-Based Learning (PBL) in an engineering course of the Universidad Nacional de Colombia, with the aim of strengthening student skills necessary for the exercise of their profession under a sustainability framework. Firstly, we present a literature review on the education for sustainability field, emphasizing the skills and knowledge areas required for its development, as well as the commitment of the Faculty of Engineering of the Universidad Nacional de Colombia, and other engineering faculties of the country, regarding education for sustainability. This article covers the general aspects of the course, describes how students team were formed, and how their experience was during the first semester of 2017. During this period two groups of students decided to develop their course project aiming to solve a problem regarding a Non-Governmental Organization (NGO) that works with head-of-household mothers in a low-income neighborhood in Bogota (Colombia). Subsequently, we show how sustainability is involved in the course, how tools are provided to students, and how activities are developed as to strengthen their abilities, which allows them to incorporate sustainability in their projects while also working on the methodology used to develop said projects. Finally, we introduce the results obtained by the students who sent the prototypes of their projects to the community they were working on and the conclusions reached by them regarding the course experience. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=sustainability" title="sustainability">sustainability</a>, <a href="https://publications.waset.org/abstracts/search?q=project-based%20learning" title=" project-based learning"> project-based learning</a>, <a href="https://publications.waset.org/abstracts/search?q=engineering%20%20education" title=" engineering education"> engineering education</a>, <a href="https://publications.waset.org/abstracts/search?q=higher%20education%20for%20sustainability" title=" higher education for sustainability"> higher education for sustainability</a> </p> <a href="https://publications.waset.org/abstracts/69628/education-for-sustainability-using-pbl-on-an-engineering-course-at-the-national-university-of-colombia" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/69628.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">66</span> Effects of the Mass and Damping Matrix Model in the Non-Linear Seismic Response of Steel Frames</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar">Alfredo Reyes-Salazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mario%20D.%20Llanes-Tizoc"> Mario D. Llanes-Tizoc</a>, <a href="https://publications.waset.org/abstracts/search?q=Eden%20Bojorquez"> Eden Bojorquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Federico%20Valenzuela-Beltran"> Federico Valenzuela-Beltran</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan%20Bojorquez"> Juan Bojorquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Jose%20R.%20Gaxiola-Camacho"> Jose R. Gaxiola-Camacho</a>, <a href="https://publications.waset.org/abstracts/search?q=Achintya%20Haldar"> Achintya Haldar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Seismic analysis of steel buildings is usually based on the use of the concentrated mass (ML) matrix and the Rayleigh damping matrix (C). Similarly, the initial stiffness matrix (KO) and the first two modes associated with lateral vibrations are commonly used to develop matrix C. The evaluation of the accuracy of these practices for the particular case of steel buildings with moment-resisting steel frames constitutes the main objective of this research. For this, the non-linear seismic responses of three models of steel frames, representing low-, medium- and high-rise steel buildings, are considered. Results indicate that if the ML matrix is used, shears and bending moments in columns are underestimated by up to 30% and 65%, respectively when compared to the corresponding results obtained with the consistent mass matrix (MC). It is also shown that if KO is used in C instead of the tangent stiffness matrix (Kt), axial loads in columns are underestimated by up to 80%. It is concluded that the consistent mass matrix should be used in the structural modelling of moment-resisting steel frames and that the tangent stiffness matrix should be used to develop the Rayleigh damping matrix. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=moment-resisting%20steel%20frames" title="moment-resisting steel frames">moment-resisting steel frames</a>, <a href="https://publications.waset.org/abstracts/search?q=consistent%20and%20concentrated%20mass%20matrices" title=" consistent and concentrated mass matrices"> consistent and concentrated mass matrices</a>, <a href="https://publications.waset.org/abstracts/search?q=non-linear%20seismic%20response" title=" non-linear seismic response"> non-linear seismic response</a>, <a href="https://publications.waset.org/abstracts/search?q=Rayleigh%20damping" title=" Rayleigh damping"> Rayleigh damping</a> </p> <a href="https://publications.waset.org/abstracts/153538/effects-of-the-mass-and-damping-matrix-model-in-the-non-linear-seismic-response-of-steel-frames" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/153538.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">149</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> Meningeal Hemangiopericytoma in an HIV-Positive Patient: A Case Report and Review of Literature</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roland%20Benedict%20Reyes">Roland Benedict Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Marc%20Edsel%20Ayes"> Marc Edsel Ayes</a>, <a href="https://publications.waset.org/abstracts/search?q=Regina%20Berba"> Regina Berba</a>, <a href="https://publications.waset.org/abstracts/search?q=Cybele%20Lara%20Abad"> Cybele Lara Abad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Three AIDS-defining malignancies have been associated with the human immunodeficiency virus (HIV): Kaposi’s sarcoma, non-Hodgkin’s lymphoma, and cervical carcinoma. However, new cases of non-AIDS defining malignancies also have been increasingly associated with HIV. One of these is a rare intracranial malignancy, meningeal hemangiopericyotma. Case Description: A 32-year old HIV-positive male, not on highly active antiretroviral therapy, was admitted to our hospital due to generalized weakness and sudden onset hearing loss. Cranial MRI was done, which revealed a temporal nodule with the following considerations: granuloma, meningioma or metastases. A craniotomy was performed and the mass excised. Results from the biopsy showed meningeal hemangiopericytoma. The patient was then started on antiretroviral therapy (Lamivudine, Tenofovir, and Efavirenz) and was discharged for radiation therapy and metastatic work-up as an outpatient. On follow-up seven months later, metastatic work up revealed multiple hepatic foci not previously documented suggestive of metastasis short of biopsy sampling. Conclusions: This case of an intracranial hemangiopericytoma in an HIV-positive patient is the second case thus far presented, based on our systematic and extensive search of the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hemangiopericytoma" title="Hemangiopericytoma">Hemangiopericytoma</a>, <a href="https://publications.waset.org/abstracts/search?q=Human%20Immunodeficiency%20Virus" title=" Human Immunodeficiency Virus"> Human Immunodeficiency Virus</a>, <a href="https://publications.waset.org/abstracts/search?q=Meningeal%20hemangiopericytoma" title=" Meningeal hemangiopericytoma"> Meningeal hemangiopericytoma</a>, <a href="https://publications.waset.org/abstracts/search?q=Neoplasm" title="Neoplasm">Neoplasm</a> </p> <a href="https://publications.waset.org/abstracts/22857/meningeal-hemangiopericytoma-in-an-hiv-positive-patient-a-case-report-and-review-of-literature" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22857.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">463</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> Screening of Antioxidant Activity of Exopolysaccharides Produced by Lactic Acid Bacteria From Human Origin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pi%C3%B1a-Ronces%20Laura%20Gabriela">Piña-Ronces Laura Gabriela</a>, <a href="https://publications.waset.org/abstracts/search?q=Reyes-Escogido%20Mar%C3%ADa%20de%20Lourdes"> Reyes-Escogido María de Lourdes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Exist a large variability in Exopolysaccharides (EPS) produced by LAB depending on carbon source, they have multiple applications in food industry mainly, but they have become important for the health. In this study, we identified EPS-producing strains belonging to the BAL group; they were previously isolated from humans. After that, we extracted and evaluated the antioxidant activity of EPS produced by all strains. Antioxidant activity was determined by DPPH method using ascorbic acid as standard for both comparison and quantification. 31 strains (51.66 %) produced EPS at concentrations between 451 and 1.561 mg/l, 16 of EPS extracted showed antioxidant effect superior to ascorbic acid at the same concentrations. EPS-producing strains were L. plantarum, L. sp and L. fermentum corresponding to Lactobacillus genus and, E. faecium, E. durans, and E. hirae of Enterococcus genus. Antioxidant activity showed by EPS from 3 strains of L. plantarum and 3 strains of E. faecium was different into specie, while the antioxidant activity determined for EPS obtained from the other strains did not show difference at specie level, but was superior to ascorbic acid. EPS produced by L. plantarum and E. hirae had the best activity, it could be considerate for selection them as a possible new alternative for therapy or treatment of diseases related whit oxidative stress. Further studies about biological functions of EPS have to be conducted for new applications in health. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oxidative%20stress" title="oxidative stress">oxidative stress</a>, <a href="https://publications.waset.org/abstracts/search?q=lactic%20acid%20bacteria" title=" lactic acid bacteria"> lactic acid bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=exopolysaccharides" title=" exopolysaccharides"> exopolysaccharides</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/17968/screening-of-antioxidant-activity-of-exopolysaccharides-produced-by-lactic-acid-bacteria-from-human-origin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17968.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">360</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> Optimization of the Structural Design for an Irregular Building in High Seismicity Zone</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arias%20Fernando">Arias Fernando</a>, <a href="https://publications.waset.org/abstracts/search?q=Juan%20Boj%C3%B3rquez"> Juan Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Ed%C3%A9n%20Boj%C3%B3rquez"> Edén Bojórquez</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Reyes-Salazar"> Alfredo Reyes-Salazar</a>, <a href="https://publications.waset.org/abstracts/search?q=Fernando%20de%20J.%20Velarde"> Fernando de J. Velarde</a>, <a href="https://publications.waset.org/abstracts/search?q=Robespierre%20Ch%C3%A1vez"> Robespierre Chávez</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Martin%20Leal"> J. Martin Leal</a>, <a href="https://publications.waset.org/abstracts/search?q=Victor%20Baca"> Victor Baca</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study focuses on the optimization of different structural systems employed in tall steel buildings, with a specific focus on the city of Acapulco, Guerrero, a region known for its high seismic activity. Using the spectral modal method, analyses were conducted to assess the ability of these buildings to withstand seismic forces and other external loads. After performing a detailed analysis of various models, the results were compared based on various engineering parameters, including maximum interstory drift, base shear, displacements, and the total weight of the structures, the latter being considered as an estimate of the cost of the proposed systems. The findings of this study indicate that steel frames stand out as a viable option for tall buildings in question. However, areas of potential improvement were identified, suggesting opportunities for further optimization of the design and seismic resistance of these structures. This study provides a deep and insightful perspective on the optimization of structural systems in tall steel buildings, offering valuable information for engineers and professionals in the field involved in similar projects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high%20seismic%20zone" title="high seismic zone">high seismic zone</a>, <a href="https://publications.waset.org/abstracts/search?q=irregular%20buildings" title=" irregular buildings"> irregular buildings</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization%20design" title=" optimization design"> optimization design</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20buildings" title=" steel buildings"> steel buildings</a> </p> <a href="https://publications.waset.org/abstracts/192081/optimization-of-the-structural-design-for-an-irregular-building-in-high-seismicity-zone" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/192081.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">24</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> Evaluation of Coastal Erosion in the Jurisdiction of the Municipalities of Puerto Colombia and Tubará, Atlántico – Colombia in Google Earth Engine with Landsat and Sentinel 2 Images</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Francisco%20Reyes">Francisco Reyes</a>, <a href="https://publications.waset.org/abstracts/search?q=Hector%20Ramirez"> Hector Ramirez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the coastal zones are home to mangrove swamps, coral reefs, and seagrass ecosystems, which are the most biodiverse and fragile on the planet. These areas support a great diversity of marine life; they are also extraordinarily important for humans in the provision of food, water, wood, and other associated goods and services; they also contribute to climate regulation. The lack of an automated model that generates information on the dynamics of changes in coastlines and coastal erosion is identified as a central problem. Coastlines were determined from 1984 to 2020 on the Google Earth platform Engine from Landsat and Sentinel images, using the Normalized Differential Water Index (MNDWI) and Digital Shoreline Analysis System (DSAS) v5.0. Starting from the 2020 coastline, the 10-year prediction (Year 2031) was determined with the erosion of 238.32 hectares and an accretion of 181.96 hectares, while the 20-year prediction (Year 2041) will be presented an erosion of 544.04 hectares and an accretion of 133.94 hectares. The erosion and accretion of Playa Muelle in the municipality of Puerto Colombia were established, which will register the highest value of erosion. The coverage that presented the greatest change was that of artificialized Territories. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coastline" title="coastline">coastline</a>, <a href="https://publications.waset.org/abstracts/search?q=coastal%20erosion" title=" coastal erosion"> coastal erosion</a>, <a href="https://publications.waset.org/abstracts/search?q=MNDWI" title=" MNDWI"> MNDWI</a>, <a href="https://publications.waset.org/abstracts/search?q=Google%20Earth%20Engine" title=" Google Earth Engine"> Google Earth Engine</a>, <a href="https://publications.waset.org/abstracts/search?q=Colombia" title=" Colombia"> Colombia</a> </p> <a href="https://publications.waset.org/abstracts/156010/evaluation-of-coastal-erosion-in-the-jurisdiction-of-the-municipalities-of-puerto-colombia-and-tubara-atlantico-colombia-in-google-earth-engine-with-landsat-and-sentinel-2-images" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/156010.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">120</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Reyes&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Reyes&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Reyes&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Gonzalo%20Reyes&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> 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