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David Naranjo-Tovar
Escuela Politécnica Nacional, Quito, Ecuador

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Journal article
Published: 09 July 2021 in Sustainability
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In Ecuador, affirmative action policies enable students from vulnerable groups to preferentially enter universities. However, these policies are limited to admission and do not include academic or socio-economic support mechanisms that, according to the literature, promote student insertion in the higher education system. In this study, the effects of socio-academic intervention on the academic performance of vulnerable students are presented. For this, 41 students were selected among 164 vulnerable students entering the Escuela Politécnica Nacional in the second term of 2019. The 41 students attended a socio-academic intervention course for one term, while the remaining 123 attended the Escuela Politécnica Nacional levelling course directly. Once both groups of students finished the levelling course, their performance in each of the course subjects was compared. The results showed that the academic performance of the students in the intervention was significantly higher in mathematics and geometry compared to the students who had no intervention. These results show that the socio-academic intervention promotes the real insertion of vulnerable students in the university system.

ACS Style

Tarquino Sánchez-Almeida; David Naranjo; Raquel Gilar-Corbi; Jessica Reina. Effects of Socio-Academic Intervention on Student Performance in Vulnerable Groups. Sustainability 2021, 13, 7673 .

AMA Style

Tarquino Sánchez-Almeida, David Naranjo, Raquel Gilar-Corbi, Jessica Reina. Effects of Socio-Academic Intervention on Student Performance in Vulnerable Groups. Sustainability. 2021; 13 (14):7673.

Chicago/Turabian Style

Tarquino Sánchez-Almeida; David Naranjo; Raquel Gilar-Corbi; Jessica Reina. 2021. "Effects of Socio-Academic Intervention on Student Performance in Vulnerable Groups." Sustainability 13, no. 14: 7673.

Article
Published: 01 June 2021 in Ingeniare. Revista chilena de ingeniería
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La ineficiencia de los métodos convencionales para remover tensoactivos y patógenos de aguas residuales ha derivado en la necesidad de desarrollar tratamientos alternativos, como el proceso Fenton y sus variantes. En este estudio se aplicó un proceso Fenton convencional y modificado con ácido etilendiaminotetraacético (EDTA) como tratamiento complementario para aguas residuales rurales de Quito, Ecuador. Inicialmente, se establecieron las condiciones de concentración de peróxido de hidrógeno (H2O2), la relación molar Fe2+:H2O2 y requerimiento de agitación para un proceso Fenton convencional. Estas condiciones se adaptaron a un proceso Fenton modificado con EDTA- en el cual se definieron las condiciones de relación molar Fe2+:EDTA y de pH. Las mejores condiciones establecidas fueron: concentración de H2O2 de 124,4 mM, agitación continua de 130 rpm, relación molar EDTA:Fe2+:H2O2 de 1:1:20 y pH de 6,41 (pH del efluente). Bajo estas condiciones, a partir de una muestra con concentración inicial de tensoactivos, coliformes fecales y DQO de 6,12 mg/L, 71000 UFC/mL y 980 mg/L, respectivamente, se alcanzó inactivación total de coliformes fecales y una reducción de 97% para tensoactivos y 93% para la demanda química de oxígeno a los 15 min de tratamiento. La concentración final de estos contaminantes cumplió con los estándares establecidos por la Agencia de Protección Ambiental (EPA). Este tratamiento podría, potencialmente, ser aplicado para complementar el tratamiento de aguas residuales que presenten problemas similares.

ACS Style

David Naranjo-Tovar; Leandro Morillo-Semanate; Jady Pérez; William Villacis-Oñate; Paul Vargas-Jentzsch; Florinella Muñoz-Bisesti. Procesos Fenton como tratamiento complementario para la remoción de tensoactivos y coliformes de aguas residuales domésticas. Ingeniare. Revista chilena de ingeniería 2021, 29, 364 -377.

AMA Style

David Naranjo-Tovar, Leandro Morillo-Semanate, Jady Pérez, William Villacis-Oñate, Paul Vargas-Jentzsch, Florinella Muñoz-Bisesti. Procesos Fenton como tratamiento complementario para la remoción de tensoactivos y coliformes de aguas residuales domésticas. Ingeniare. Revista chilena de ingeniería. 2021; 29 (2):364-377.

Chicago/Turabian Style

David Naranjo-Tovar; Leandro Morillo-Semanate; Jady Pérez; William Villacis-Oñate; Paul Vargas-Jentzsch; Florinella Muñoz-Bisesti. 2021. "Procesos Fenton como tratamiento complementario para la remoción de tensoactivos y coliformes de aguas residuales domésticas." Ingeniare. Revista chilena de ingeniería 29, no. 2: 364-377.

Journal article
Published: 10 February 2021 in Journal of Technology and Science Education
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The present work analyzes the academic performance of students from at-risk groups from the perspective of Social Network Analysis (SNA), studying the academic and interaction information of 45 students belonging to at-risk groups who attended a pilot socio-academic course during one academic term. This information was used to create a sociogram, which served as the basis for determining the centrality metrics of the SNA. The relationships between these metrics and the academic variables were then studied by means of correlation analysis and linear regression with LASSO standardization. As a preview of the results, it was determined that the academic performance of the students in the pilot course was influenced, on the one hand, by their academic knowledge prior to being admitted to the university, represented by the score on the Mathematics and Geometry section of the diagnostic test, and on the other hand, by the dynamics of the social network in which they interacted in the classroom, represented by the eigenvector centrality. These results have significant potential for explaining the academic performance according to SNA metrics, and they provide evidence to support the implementation of practices that promote a healthy social environment in an academic context.

ACS Style

Tarquino Sanchez; David Naranjo; Jack Vidal; Diego Salazar; Cristina Pérez; Marianela Jaramillo. Analysis of academic performance based on sociograms: A case study with students from at risk groups. Journal of Technology and Science Education 2021, 11, 167 -179.

AMA Style

Tarquino Sanchez, David Naranjo, Jack Vidal, Diego Salazar, Cristina Pérez, Marianela Jaramillo. Analysis of academic performance based on sociograms: A case study with students from at risk groups. Journal of Technology and Science Education. 2021; 11 (1):167-179.

Chicago/Turabian Style

Tarquino Sanchez; David Naranjo; Jack Vidal; Diego Salazar; Cristina Pérez; Marianela Jaramillo. 2021. "Analysis of academic performance based on sociograms: A case study with students from at risk groups." Journal of Technology and Science Education 11, no. 1: 167-179.

Journal article
Published: 10 November 2020 in Sustainability
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The school-dropout problem is a serious issue that affects both a country’s education system and its economy, given the substantial investment in education made by national governments. One strategy for counteracting the problem at an early stage is to identify students at risk of dropping out. The present study introduces a model to predict student dropout rates in the Escuela Politécnica Nacional leveling course. Data related to 2097 higher education students were analyzed; a logistic regression model and an artificial neural network model were trained using four variables, which incorporated student academic and socio-economic information. After comparing the two models, the neural network, with an experimentally defined architecture of 4–7–1 architecture and a logistic activation function, was selected as the model that should be applied to early predict dropout in the leveling course. The study findings show that students with the highest risk of dropping out are those in vulnerable situations, with low application grades, from the Costa regime, who are enrolled in the leveling course for technical degrees. This model can be used by the university authorities to identify possible dropout cases, as well as to establish policies to reduce university dropout and failure rates.

ACS Style

Iván Sandoval-Palis; David Naranjo; Jack Vidal; Raquel Gilar-Corbi. Early Dropout Prediction Model: A Case Study of University Leveling Course Students. Sustainability 2020, 12, 9314 .

AMA Style

Iván Sandoval-Palis, David Naranjo, Jack Vidal, Raquel Gilar-Corbi. Early Dropout Prediction Model: A Case Study of University Leveling Course Students. Sustainability. 2020; 12 (22):9314.

Chicago/Turabian Style

Iván Sandoval-Palis; David Naranjo; Jack Vidal; Raquel Gilar-Corbi. 2020. "Early Dropout Prediction Model: A Case Study of University Leveling Course Students." Sustainability 12, no. 22: 9314.

Conference paper
Published: 01 January 2019 in Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation, and Infrastructure for Sustainable Cities and Communities”
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ACS Style

Angelica Jimenez; David Naranjo; Tarquino Sanchez; Ivan Sandoval. Proposal of a Mathematics Pilot Program for Engineering Students from Vulnerable Groups of Escuela Politécnica Nacional. Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation, and Infrastructure for Sustainable Cities and Communities” 2019, 1 .

AMA Style

Angelica Jimenez, David Naranjo, Tarquino Sanchez, Ivan Sandoval. Proposal of a Mathematics Pilot Program for Engineering Students from Vulnerable Groups of Escuela Politécnica Nacional. Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation, and Infrastructure for Sustainable Cities and Communities”. 2019; ():1.

Chicago/Turabian Style

Angelica Jimenez; David Naranjo; Tarquino Sanchez; Ivan Sandoval. 2019. "Proposal of a Mathematics Pilot Program for Engineering Students from Vulnerable Groups of Escuela Politécnica Nacional." Proceedings of the 17th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Industry, Innovation, and Infrastructure for Sustainable Cities and Communities” , no. : 1.