Desempeño mecánico de montajes de líneas de distribución de energía eléctrica por Fernández Vásquez, Raúl

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Evaluación del desempeño de un catalizador de níquel/alúmina en distintas condiciones de operación para la producción de hidrógeno mediante reformado de metanol en fase acuosa (APR... por Cartín Muñoz, Felipe, Ulate Brenes, Mauricio Adolfo

“…Evaluation of the Performance of a Nickel/Alumina Catalyst Under Different Operating Conditions to Produce Hydrogen by Aqueous Phase Methanol Reforming (APR)…”
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Metodología para la gestión de recursos de consumo energético durante el proceso constructivo por Solís Acuña, Mariana, Mata Abdelnour, Erick

“…During the process, this proposed methodology obtained a high degree of acceptance from a validation committee, who saw its potential for the estimation and recording of sustainability statistics throughout the performance of the project, and how it could help to control resource consumption.…”
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Ozonación catalítica heterogénea de fenol utilizando catalizadores de hierro en un reactor de lecho percolador por Briceño Mena, Luis, Durán Herrera, Esteban

“…Compared to direct ozonation, the use of the Fe-diatomite pellets and Fe-coated glass beads enhanced the reactor performance by 48 % and 23 %, respectively. It was confirmed that mass transfer is an important factor that restricts this reaction system performance; consequently, further improvement in mass transport rate is necessary for system optimization.…”
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Efecto del método de preparación sobre la actividad catalítica de catalizadores de Ni/ γ-Al2O3 por Miranda Morales, Bárbara Cristina

“…The performance of catalysts has been shown to be strongly dependent on their methods of preparation.  …”
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Metodología FMECA para un aerogenerador doblemente alimentado por Solano, Andrey Alberto, Cruz Jiménez, Brandon, Ramos Fernández, Cristian Andrés, Solís Guzmán, Kevin, Núñez Mata, Oscar, Pérez Mora, Aramis

“…This document presents the application of this methodology to a doubly fed induction wind turbine, to perform a qualitative and quantitative evaluation of its failure characteristics. …”
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Modelos de frecuencia de choques para segmentos e intersecciones: Ruta 34 en Costa Rica por Varela Araya, Viviana, Agüero Valverde, Jonathan

“…The first three steps of the process were developed: network screening, diagnosis and selection of countermeasures. To perform the analysis, the method of expected crash frequency with empirical Bayes adjustment was used because the accuracy differs from other methods that considered data availability, regression-to-the-mean bias, and how the performance threshold is established.One of the main problems found on this road is the absence of facilities for pedestrians and cyclists as well as problems with access management, shoulder width, speed and design of intersections.…”
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Control borroso de la remoción de estrógenos en un biorreactor de membranas por Sanchez, Leadina, Torres Cruz, Ennodio

“…For this purpose, the values measured or obtained by experts in laboratory scale experiments were fuzzified, and on the basis of previously designed inference rules, the inference process was performed, and finally the output is again desfuzzified for crisp value. …”
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Metodología para Evaluar la Condición de Transformadores Eléctricos de Potencia Basada en un Índice de Salud Compuesto por Nuñez Mata, Oscar, Gómez-Ramírez, Gustavo, Acuña Rojas, Fauricio, González Solís, César

“…The results showed a good performance of the proposed HI evaluating real transformers. …”
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Respuesta sísmica de edificios de 8 niveles de concreto armado con irregularidad en planta por Villafuerte Lujano, Ingrid Angela, Fernández-Dávila González, Victor Ivan

“…However, these structures contradict their seismic performance due to their differing responses. Additionally, a hypothesis must be assumed for the floor slab, which can be a rigid diaphragm (DR) or a flexible diaphragm (DF). …”
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Evaluación de una planta piloto para el tratamiento de aguas residuales ordinarias por medio de un filtro percolador con relleno de esponjas colgantes de flujo descendente (DHS) co... por Mora, Erick Centeno, Ugalde Herra, José Luis, Rodríguez Cambronero, Diego

“…The system DHS + SS was monitored for more than a year (inflow of the DHS and outflow of the SS), varying the hydraulic retention time (HRT) and following its performance for the organic matter removal.The system had his best behavior for a HRT of 2,8 hours, for an organic volumetric loading rate between 0,60 to 0,80 kgDBO/m3-d. …”
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Evaluación del uso de trampa de evaporación en la evaporación en la calibración de pipetas de pistón en volúmenes menores o iguales a 100 µL por Méndez Arias, Johanna

“…This paper aims to demonstrate the importance of using evaporation trap during piston pipette calibration, specifically at microliter levels (μL). Calibrations were performed in a laboratory pipette using the gravimeter method with evaporation trap, and without trap or any correction by evaporation. 10 repetitions were performed at three different points and the values provided by the calibration certificate of the analyzed pipette were compared to a reference value determined by the National Metrology Laboratory (LACOMET).…”
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Determinación de las propiedades mecánicas del cuero fino de vaca sometido a condiciones variadas de temperatura y humedad por Briguido, Jose Miguel, Calderón, Julieta Fabiana, Recchioni, Liliana Laura, Diaz, Adriana Cecilia

“…We used a completely randomized model and a covariate statistical model and a posteriori tests were performed according to Fisher.The parameter estimation was performed according to the Restricted Maximum Likelihood (REML) method using the InfoStat software. …”
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Desigualdades tarifarias en el sistema de transporte público en Costa Rica por Quirós Calderón, Cristhian Santiago, Agüero-Valverde, Jonathan

“…The results indicate that random coefficients models perform better than independent models for clustered data. …”
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MEASURING CUTTING FORCES IN MACHINING PROCESSES por Vásquez Céspedes, Horacio

“…Force sensors are needed because measuring cutting forces during machining processes is the mostimportant and basic step to determine and control the conditions under which the machine, the tool, and the workpiece are performing.In the majority of applications the measurement of cutting forces during machining is done using dynamometers basedon either strain gages or piezo-electric transducer with quartz sensors. …”
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