3 research outputs found

    Characterization of the Physical - Mechanical Properties of Alpaca Fiber (Vicugna Pacos) at the Tunshi Experimental Station

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    The alpaca is one of the four South American camelids that mainly inhabit the inter-Andean zone of Ecuador. Alpaca fiber is characterized by being a natural, soft and resistant fiber, of which, the fleece is the most valued part. The objective of this research was to evaluate the quality parameters of alpaca fiber in terms of physical-mechanical properties. The research was carried out in the Tunishi Experimental Station, ESPOCH. A descriptive statistic of mean, minimum and maximum range, and separation of means per student was applied. The alpaca with characteristics of Huacaya breed was selected and the shearing was carried out manually to obtain the fleece. Later, the performance of the fleece was evaluated, which was 85.71%. Two categories of fiber were selected: fine and thick. Sixty samples were taken for analysis by stretched and unstretched fiber length. The measurements of unstretched fiber length in cm for the thin and thick fiber were 12.50 cm and 13.52 cm respectively, presenting significant differences (p≤0.05). The measurements of the stretched fiber length in cm were 17.29 cm for fine fiber and 17.27 cm for thick fiber, presenting no significant differences (p≥0.05). The resistance of thread and fabric for fine fiber was 590 N/cm2, and for thick fiber was 2835.5 N/cm2, presenting highly significant differences (p≤0.01). Regarding the percentage of yarn elongation, the values obtained were 19% for fine fiber and 12% for thick fiber, observing highly significant differences (p≤0.01). The thick fiber fabric had a better resistance (2.3 BAR) than the fine fiber fabric (1.7 BAR), with a time of 2.34 s and 1.88 s respectively. The classification of the fiber by its softness did not present significant differences. Finally, regarding the sensory classification, it was established as a soft fiber with 91%. Keywords: alpaca, fleece, fine fiber, thick fiber, fiber properties. Resumen La alpaca es uno de los cuatro camélidos sudamericanos que principalmente habitan en la zona interandina del Ecuador. La fibra de alpaca se caracteriza por ser una fibra natural, suave y resistente; de la cual, el vellón es la parte de la fibra del animal más valorada. El objetivo de esta investigación fue evaluar los parámetros de calidad de fibra de alpaca en cuanto a las propiedades físico - mecánicas. La investigación se la realizó en la Estación Experimental TUNSHI - ESPOCH. Se aplicó una estadística descriptiva de media, rango mínimo y máximo y separación de medias por t estudent. Se seleccionó a la alpaca con características de la raza Huacaya y se realizó la esquila por el método manual para la obtención del vellón. Posteriormente, se evaluó el rendimiento del vellón el cual fue de 85,71%, se seleccionaron dos categorías de fibra fina y gruesa. Sesenta muestras fueron tomadas para su análisis: longitud de mecha estirada y sin estirar. La media de longitud de fibra sin estirar en cm para la fina y gruesa fueron de 12,50 y 13,52 correspondientemente, presentando diferencias significativas (p≤0,05), La media de la longitud en cm de fibra estirada determinó que la fibra fina presentó una media de 17,29 y la fibra gruesa de 17,27 cm, sin presentar diferencias significativas (p≥0,05). La resistencia del hilo y tejido para la fibra fina fue de 590 N/cm2 y para la gruesa fue de 2835,5 N/cm2, presentando diferencias altamente significativas (p≤0,01). Finalmente, en cuanto al porcentaje de elongación de hilo, presentó un 19% para fibra fina y un 12% para gruesa, observándose también diferencias altamente significativas (p≤0,01). El tejido de la fibra gruesa tuvo mejor resistencia (2,3 BAR) que el de la fibra fina (1,7 BAR), con un tiempo de 2,34 s y 1,88 s respectivamente. La clasificación de la fibra por su suavidad, no presentó diferencias significativas. En cuanto a la clasificación sensorial se la ubico como una fibra suave con el 91%. Palabras clave: alpaca, vellón, fibra fina, fibra gruesa, propiedades de la fibra

    Fostering the reduction of assortative mixing or homophily into the class

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    Human societies from the outset have been associated according to race, beliefs, religion, social level, and the like. These behaviors continue even today in the classroom at primary, middle, and superior levels. However, the growth of ICT offers educational researchers new ways to explore methods of team formation that have been proven to be efficient in the field of serious games through the use of computer networks. The selection process of team members in serious games through the use of computer networks is carried out according to their performance in the area of the game without distinction of social variables. The use of serious games in education has been discussed in multiple research studies which state that its application in teaching and learning processes are changing the way of teaching. This article presents an exploratory analysis of the team formation process based on collaboration through the use of ICT tools of collective intelligence called TBT (The best team). The process and its ICT tool combine the paradigms of creativity in swarming, collective intelligence, serious games, and social computing in order to capture the participants’ emotions and evaluate contributions. Based on the results, we consider that the use of new forms of teaching and learning based on the emerging paradigms is necessary. Therefore, TBT is a tool that could become an effective way to encourage the formation of work groups by evaluating objective variable of performance of its members in collaborative works.Postprint (published version

    Fostering the reduction of assortative mixing or homophily into the class

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    Human societies from the outset have been associated according to race, beliefs, religion, social level, and the like. These behaviors continue even today in the classroom at primary, middle, and superior levels. However, the growth of ICT offers educational researchers new ways to explore methods of team formation that have been proven to be efficient in the field of serious games through the use of computer networks. The selection process of team members in serious games through the use of computer networks is carried out according to their performance in the area of the game without distinction of social variables. The use of serious games in education has been discussed in multiple research studies which state that its application in teaching and learning processes are changing the way of teaching. This article presents an exploratory analysis of the team formation process based on collaboration through the use of ICT tools of collective intelligence called TBT (The best team). The process and its ICT tool combine the paradigms of creativity in swarming, collective intelligence, serious games, and social computing in order to capture the participants’ emotions and evaluate contributions. Based on the results, we consider that the use of new forms of teaching and learning based on the emerging paradigms is necessary. Therefore, TBT is a tool that could become an effective way to encourage the formation of work groups by evaluating objective variable of performance of its members in collaborative works
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