Conference Agenda

The study evaluates the technical and functional justification of the commercial segmentation between common-use soaps and facial cleansers, analyzing whether the price disparity corresponds to tangible differences in performance and formulation. The methodology employed a multidimensional approach on 16 commercial samples (8 per category), covering physicochemical characterization, performance tests, sensory analysis with a blind panel of 30 consumers, and a regulatory audit. The results revealed an unexpected physicochemical convergence: both categories presented equivalent rheological behaviors, density, and surface tension, as well as similar acidic pH profiles (Common: 5.1 vs. Facial: 5.5). The most significant technical differentiation lay in the detergency percentage, which was notably superior in common-use soaps. In contrast to this similarity in physical properties, a marked economic gap of 4 to 1 was determined in the volume-cost ratio (mL/USD), evidencing a disparate market positioning. Sensorially, the panel showed a hedonic preference for common soaps due to their aromatic profile but evidenced a low capacity to functionally discriminate facial cleansers. It is concluded that, despite the parity in physical variables, the facial category sacrifices detersive power in favor of biocompatibility, justifying its cost through dermatological safety attributes that are not immediately perceived by the consumer.

Abstract– Manual control of water mixing in solar water heating systems compromises efficiency and limits hot water availability. This project develops a PID control system for optimal water tempering, integrating sensors and mixing actuators into a vacuum tube solar collector pilot. The objective is to optimize hot water consumption through real-time IoT-based monitoring, thereby increasing the available volume of tempered water at the desired setpoint. The thermal system is modeled, the controller is designed, and its performance is validated against manual operation. Results demonstrate an approximate 20% improvement in operational efficiency and user comfort, achieving a 150% expansion of the useful volume by delivering 300 liters of water at 37°C from a 120-liter tank.

Traditional cost of quality models, particularly the Prevention-Appraisal-Failure (PAF) framework, focus primarily on internal and externally observable failure costs within organizational boundaries. However, in contexts characterized by programmed obsolescence and accelerated product replacement cycles, a significant portion of quality-related costs may be displaced beyond the firm and not captured in conventional accounting structures. This paper proposes an extended analytical model (PAF+) that incorporates a fifth component, termed Displaced Non-Quality Cost (CND), conceptualized as the aggregation of environmental, social, and regulatory externalized costs. The model is formalized through a dynamic cost function and extended using integral and marginal analysis to evaluate intertemporal cost accumulation and strategic trade-offs. A numerical illustration demonstrates how reductions in durability may generate systemic cost increases not reflected in traditional quality metrics. The proposed framework contributes to quality management theory by integrating sustainability, regulatory evolution, and intertemporal analysis into cost modeling, offering a generalized structure applicable across sectors. Future research should focus on empirical operationalization and sector-specific estimation of displaced costs.

The objective evaluation of plantar vestiges and foot functionality represents a significant challenge in the fields of health and biomedical engineering. Simultaneously, the development of sustainable technologies aimed at harnessing energy generated during daily physical activities has garnered increasing interest.
Therefore, piezoelectricity emerges as a disruptive option by transforming the mechanical energy produced by human gait into electrical energy, thus allowing biomechanical evaluation and micro-energy generation to be integrated into a single working system.
This study aimed to analyze the relationship between various biomechanical parameters of the plantar vestige and the piezoelectric energy generated during human gait, through the ergonomic validation of a novel piezoelectric tile system. A quantitative pilot study was conducted with 100 university students. Biomechanical and electrical variables were simultaneously recorded, and the energy generated was estimated based on the voltage generated and the contact time of the foot with the surface.
The results showed a positive and statistically significant association between foot contact time and generated voltage (r = 0.82; p < 0.001), rein https://orcid.org/0009-0003-8901-0159 forcing the influence of biomechanical variables of the vestigial foot on the system's electrical response. In conclusion, the viability of piezoelectric tiles can be affirmed, as they constitute an accessible and sustainable alternative for functional foot assessment and for low-power micro-energy generation

This study evaluates the aerodynamic performance of a Savonius-type vertical axis wind turbine (VAWT) using computational fluid dynamics (CFD) simulation for application in low-wind-speed urban environments, such as the city of Lima. The research is divided into three phases: first, a three-dimensional model of the turbine is developed in Autodesk Inventor Professional software with rotor diameter and height dimensions of 0,37 m; second, a numerical model is established based on the literature; and third, the impact of a straight-blade configuration is comparatively analyzed against a helical-blade configuration. The finite volume method is used for the numerical model, and two domains are discretized: first, the cylindrical region that rotates along with the turbine geometry, and second, the stationary rectangular prismatic region, both with a mesh of tetrahedral and prismatic elements. The k-ε turbulence model and the sliding mesh technique combined with 6DOF are used to capture the transient flow behavior. Air speeds of 3 m/s, 4 m/s, and 5 m/s were simulated. The results allow for quantifying the improvement in the power coefficient (Cp) and torque coefficient (Cts) of the modified geometry. This work provides a technical basis for the design of microgeneration technologies adapted to local climatic conditions of high turbulence and low kinetic energy.

The design and manufacture of a portable refrigerator for mobile equipment using renewable energy addresses the challenge of maintaining the cold chain (2-8°C) for vaccines in rural areas of Peru with limited access to electricity. Using Peltier cells (TEC1-12706 at 12V), a 50W solar panel, a 12V-3.2Ah battery, and a charge controller, the prototype achieves a COP of 0.74 and consumption of 52.2W, maintaining temperatures of 4-6°C in an insulated polypropylene box. The methodology included thermal load calculation, stress simulation (Autodesk Inventor), component selection, and experimental testing, validating autonomy for transport in common vehicles. Results show thermal stability under vibrations and adverse conditions, with total costs of S/1,324, overcoming previous limitations such as heavy batteries (e.g., 300Ah in De La Cruz and Solís, 2019) through a direct solar approach.This ecological and scalable system reduces losses of medical supplies, aligning with MINSA regulations (NTS 136-MINSA/2017) and promoting sustainability in emergencies. Conclusions highlight its viability for rural public health, recommending optimizations in Peltier efficiency.

The main objective of this research was to elaborate on biodegradable packaging using residual fiber from Saccharum officinarum in Picsi, 2025. The study addresses the environmental problems caused by agro-industrial waste and seeks to contribute to the fulfillment of SDG 12. A quantitative approach with an experimental design was applied. The sample consisted of 120 citizens, selected through a random sampling. A Likert-type survey was used, which was validated with a Cronbach's Alpha of 0.941, where data were analyzed using descriptive and inferential statistics. The results demonstrated that 51.2 consider a medium level of social acceptance and 70.2 of perception of packaging use, with a high correlation of r = 0.845 between the two. A relationship was also found between environmental awareness and barriers such as costs. It was concluded that residual fiber has a significant influence on environmental sustainability. Its use and citizen involvement strengthen ecological and social well-being in Picsi.