Conference Agenda

The inadequate management of household waste and pig manure in the Chutana area of the San Bartolo district generates environmental impacts that affect local residents and pig farms. This study aims to estimate biogas production from pig manure and household waste for heating purposes in a pig farm. The characterization of household organic waste represents 52% of the total, while the farm generates 386.15 of manure. In terms of chemical composition, manure presented a pH of 7.23 and a C/N ratio of 10.56, whereas household waste showed a pH of 5.03 and a C/N ratio of 26.64. Using response surface analysis, biogas production from three mixtures (20:80, 50:50, and 80:20) determined that the optimal proportion was 43:57, reaching an average value of 1800 mL after 12 days. By scaling up production using the total daily available waste, a biogas yield of 3.55 can be obtained, which, when used as fuel for a heater, will generate 27.70 , thereby supplying the thermal deficit of the pig farm.

The study aimed to analyze the relationship between digital competencies and autonomous learning in higher education students, considering both the overall level of digital competencies and the behavior of their specific dimensions. A quantitative approach was employed, with a non-experimental, cross-sectional, correlational design. The sample consisted of 96 university students selected thru non-probability convenience sampling. Data collection was conducted using validated questionnaires that assessed digital competencies and autonomous learning, exhibiting adequate levels of internal consistency. For the inferential analysis, Spearman’s rho coefficient was used. The results revealed a positive and statistically significant relationship between digital competencies and autonomous learning, as well as differentiated associations among their dimensions, highlighting information access and use and creativity and innovation as the components most closely related to autonomy in learning. It is concluded that the comprehensive strengthening of digital competencies constitutes a key factor in promoting autonomous learning processes in higher education.

Abstract– This study investigates the nonlinear seismic behavior of steel Special Moment Frames (SMFs) designed in accordance with the Costa Rican Seismic Code of 2010 (CSCR 10). The main objective is to evaluate the overstrength acquired by the structure due to drift limits in the Code and whether the ductility assigned during seismic design is effectively developed under seismic demand. Two symmetric prototype structures—a three story and a five-story steel frame—were designed using W shaped members and analyzed through nonlinear static (pushover) analysis. The influence of interstory drift limits, building height, and second order P–Δ effects on overstrength and intrinsic ductility was examined. Results show that frames designed in strict compliance with CSCR 10 drift limits remain predominantly elastic, exhibiting significant overstrength and limited plastic hinge formation. Taller structures displayed higher stiffness and reduced ductile capacity compared to lower rise frames. When drift limits were relaxed and P–Δ effects were explicitly considered, increased inelastic behavior consistent with SMF design philosophy was observed. The findings suggest that current drift control requirements in CSCR 10 increase building overstrength and reduce inelastic behavior.

Currently, orange peel waste (Citrus sinensis) generated in juice shop, restaurants, markets, and other industries is a renewable raw material due to its cellulose content (37%) for the production of second-generation bioethanol. The process to optimize the conversion of orange peel cellulose to bioethanol will involve the following steps: physical pretreatment, enzymatic hydrolysis to obtain glucose containing sugars, fermentation of the syrup with Saccharomyces cerevisiae, distillation, and subsequent dehydration. The variables studied will include temperature, pH, reaction time, and solvent ratio to increase yield and optimize each step.

Optimal conditions for cellulase enzyme dosage levels were obtained for the production of bioethanol from orange peels in hydrolysis. The treatment of 50 grams of orange peel with 400 mL of water and 10 mL of cellulase enzyme at 55 ° C for 1 hour, an increase in sugar content from 3 brix to 5.9 brix. After fermentation with Saccharomyces Cerevisiae from 5.9 brix it was reduced to 4 brix.

This article describes the innovative experience implemented in the TC1003B Engineering Modeling with Computational Mathematics Training Unit at the School of Engineering and Sciences of the Tecnológico de Monterrey, Campus Querétaro, using the Gradescope platform. This tool provides support in the assessment and feedback process for assignments and exams, streamlining the time dedicated to this task. It also allows for the analysis of results by activity and a summary of the main difficulties detected in each of the proposed exercises. This allows, if necessary, a clarification of the topic and an awareness of the most common errors developed in the exercises, enriching student learning. Gradescope uses Artificial Intelligence (AI) to classify student submissions by exercise type, which favors assessment and the provision of unbiased feedback, making it much more objective and impartial. Additionally, it streamlines the identification of areas of improvement in the proposed questions, in terms of wording, level of difficulty, time required to complete them and a specific rubric for each exercise in the implemented activities. Throughout the study, three variables were measured: engagement, learning gain, and use of technology. The results obtained from the pre-test and post-test comparison reflected high levels of satisfaction in each of these variables.

This work addresses the design of a motivational and playful device aimed at stimulating verbal production in children with delayed speech development. The proposal is inspired by imitation-based dynamics used by speech-language therapists and seeks to transform therapeutic exercises into an interactive experience that functions as a motivating companion during practice outside the clinical setting. The research identifies as a critical problem the severe intermittency of the Peruvian healthcare system, where service saturation limits therapy sessions to quarterly appointments, thereby delaying the child’s progress. The study is grounded in principles of user-centered design and learning psychology, integrating sensory stimuli that reinforce interest in oral communication and auditory feedback.

We present an experimental study on the hydrodynamic mass in a horizontal pipe partially filled with liquid. The pipe is configured as a free-free beam with small amplitudes of transverse oscillation and no-flow condition. Bending vibrations of the pipe in the vertical and horizontal planes are investigated for different amounts of filling liquid. In contrast with the empty and fully-filled pipe, it is observed that natural frequencies of the vertical and horizontal directions are different due to asymmetry induced by the liquid layer, which acts like an hydrodynamic mass. Less mass of liquid is added to the pipe when oscillating horizontally; as a consequence, natural frequencies for the horizontal direction are found to be greater than vertical direction. We use a classical method to calculate hydrodynamic mass coefficient based on natural vibration frequencies. Results show the hydrodynamic mass coefficient increases with the liquid's level.

Amblyopia, commonly known as “lazy eye,” is one of the leading causes of preventable visual impairment in childhood, requiring early screening to enable effective treatment and avoid permanent visual deterioration. In Peru, particularly in rural areas, limited access to specialized visual health services, scarce resources, and geographic barriers hinder timely visual assessments, increasing the risk of late diagnosis and long-term impact on children’s educational development and quality of life. In this context, primary schools emerge as strategic environments for initial visual screening due to their accessibility and continuous contact with the child population. This study presents PediView, a portable and low-cost visual screening device designed to support early amblyopia detection in children from rural areas of Peru. The system is intended for use by non-specialized users, such as teachers, and integrates a handheld optical viewer with an intuitive mobile application that enables standardized ocular image capture and basic visual assessment based on principles similar to the Hirschberg test. The design is grounded in industrial design principles, pediatric ergonomics, and technological accessibility, prioritizing usability, portability, and affordability. PediView is proposed as an orientative screening tool that does not replace medical diagnosis but facilitates the identification of visual warning signs and promotes timely referral to specialized health services, contributing to improved access to early visual screening in resource-limited settings.