Revista de Investigación Hatun Yachay Wasi

Evaluation of soil infiltration capacity with forest plantations of Pinus radiata and Polylepis spp. at Laguna Rontoccocha, Abancay, Peru

Pilar Segovia Guillen — 2025-07-01

Infiltration is considered a significant component of the hydrological cycle, a good indicator of soil quality and health, and recharges aquifers. The aim of this study was to evaluate the infiltration capacity of soil planted with Pinus radiata and Polylepis spp. in Rontoccocha Lagoon, Abancay, Peru. The population consisted of soil with forest cover of Pinus radiata and Polylepis spp. The samples were four plots in soils with Pinus radiata and in soils with Polylepis spp. Soil physicochemical parameters (humidity, bulk density (AD), pH, texture and organic matter), infiltration rate, accumulated depth and infiltration capacity (Horton equation) were determined. Minitab was used, and the student t-test, Mann-Whitney, and simple regression analyses were applied, with a statistical significance value (p < 0.05). The results showed 0.95, 12.54%, sandy loam, and 11.24% vs. 0.60, 46.55%, loamy sand, and 56.59% for AD, moisture, texture, and organic matter. Both soils are acidic with a high level of sand and little silt and clay. The average infiltration rate was 74.63 cm/h (Polylepis spp.) and 20.48 cm/h (Pinus radiata), with a significant difference. The average infiltration capacity was 17.63 cm/h vs. 44.12 cm/h for Pinus radiata and Polylepis spp., respectively. There was a high positive correlation in the linear regression analysis for both soils during the sampling months.
Forest cover positively affects the soil infiltration process due to its root systems, vegetation layer, and high organic matter, which greatly improves soil macroporosity.

Digital transformation: perspective from the service management model and the process map

Walter Andía Valencia — 2025-07-01

In recent years, organizations have been exposed to constant transformations generated by
technological advancement and the context of the markets associated with the sector, which has
driven the modification of the management model and their internal structures. In this scenario,
digital transformation (DT) becomes a fundamental strategy that allows organizations to innovate
their services, optimize processes, and, above all, respond to market demands and maintain their
competitiveness. This research aims to analyze digital transformation from a strategic and
comprehensive perspective in search of a participatory and didactic methodological proposal for its
implementation. It is based on a theoretical and documentary review based on specialized research
on the subject. It is determined that DT is a profound reconceptualization of the customer-centric
organization, whose success requires a collaborative, transversal, and strategic approach. For this
purpose, the use of the service management model and the process map is proposed.

Good placement of the boussinesq equation good with internal dissipation

George J. Bautista — 2025-06-01

This article focuses on the study of the good Boussinesq equation, proving the existence and uniqueness of solutions in periodic Sobolev spaces for s ≥ 2. The adopted strategy consists of first analyzing a particular case, in which one of the equation’s coefficients is identically zero, and then extending the results to the general case through an iterative procedure based on the fixed-point method. To achieve this, fundamental tools such as Semigroup Theory and Fourier Analysis are employed.

Voltage control in 300 kVA stabilizers using PIC18F4550 microcontroller: design, simulation and tests

Ali Vivas Bonilla — 2025-07-01

A control system was developed for a 300 kVA Samlex industrial voltage stabilizer to improve electrical stability at Gurimetal's facilities. Due to the lack of technical documentation, the equipment was characterized through no-load and load testing. Based on this analysis, a control board using the PIC18F4550 microcontroller was designed to monitor key electrical parameters in real time, such as voltage and frequency, enabling precise output adjustments
to maintain voltage within required operating ranges. The system included signal conditioners
and hardware-based protection mechanisms against overvoltage, overcurrent, and overload,
as well as thermal protection for the stabilizer's contactors. These safety features prevent
damage to sensitive components and ensure stable performance under load variations. The
design was validated through simulations and prototype testing before final production.
Results confirmed the system’s ability to maintain stable voltage levels within acceptable
limits, even under input fluctuations.

Proposal for implementation of photovoltaic panels to reduce energy consumption costs in a tannery

Estefany Rivera Peñaranda — 2025-07-01

The implementation of photovoltaic systems has become a topic of interest today due to their
efficiency and contribution to the ecosystem, generating greater promotion of the use of renewable
energy. This study analyzes a proposed implementation of photovoltaic panels to reduce operating
costs in a tannery. The study was descriptive, cross-sectional, and non-experimental in design.
Monthly energy consumption was examined over a study period to project the impact of
photovoltaic panels on cost minimization and energy efficiency. The results indicate that their
implementation would reduce energy costs by 80%, generating an estimated monthly savings of
S/16,331.84, with a return on investment (ROI) of 15.78%. It is inferred that the proposal for
photovoltaic panels would be viable, both economically and technically, allowing for efficient
resource management and contributing to environmental sustainability by transforming solar energy
into electricity.

Influence of an ergonomics program on the risk level of forced postures in a manufacturing company

Rosario Quispe Flores — 2025-07-01

The present research aimed to determine the influence of an ergonomics program on the level of risk of forced postures in a plastic waste processing manufacturing company. The sample was 13 workers. The REBA methodology was used. The program consisted of the identification, evaluation, control, and re-evaluation of the risk factor for awkward postures in workers in the
operational area. The Shapiro-Wilk normality test, Wilcoxon rank test, and Cohen's D test were applied. Cohen's d test was 0.7897. Initial results showed tasks with a high level of risk; after the program was implemented, a re-evaluation was carried out, showing a reduction in risk levels in most of the relevant tasks of the production process. The implementation of the ergonomics program has a positive influence, reducing the risk levels of forced postures with a medium effect among operational workers in a manufacturing company.

Technical and economic viability of a biodigester to reduce operating costs in a Lezem guinea pig farm

Sergio Jáuregui Morales — 2025-07-01

This study evaluates the technical and economic feasibility of implementing a 10 m³ biodigester as a strategy to reduce operating costs at the Lezem guinea pig farm, located in Chancay, Peru. The analysis focuses on high expenditures related to gas consumption, waste disposal, and maintenance, which together account for 33.04 % of total operating costs. A descriptive quantitative approach was applied using operational data collected over a 12-month period. The results show that the biodigester would generate average monthly savings of S/1,797.80, equivalent to approximately S/21,573.60 per year. Additionally, it is projected to generate a net monthly cash flow of S/2,989.61 by biogas and the sale of biol as an organic fertilizer. The system also improves environmental sustainability by converting organic waste into usable resources. This evidence supports the use of biodigesters as a comprehensive and cost-effective solution for small-scale agricultural systems, contributing to both economic resilience and ecological efficiency in rural production units.

Structural behavior in lightweight slabs with integration of composite slabs for the construction of single-family homes

Jhordan Cruz Lopez — 2025-07-01

Innovative construction technologies have been implemented in recent years, including composite slabs, which use metal plates from the Steel Deck system, composed of sheets of heavy galvanized structural steel, to be used as part of a floor or roof slab. The aim was to determine the structural behavior of lightweight slabs with the integration of composite slabs or Steel Deck replacing roof blocks in the construction of single-family homes in Abancay, Apurímac. The compressive, flexural, and forced vibration strengths of composite slab specimens were evaluated. Eighteen concrete specimens were prepared and tested at 7, 14, and 28 days. The mix design was made with a strength of f’c = 210 kg/cm² or f’c = 20.59 MPa; for the AD-730 profile, the predominant behavior or failure type is ductile. No damage was observed in the lightweight slab specimens with a collaborating plate after reaching maximum dynamic amplification. The collaborating slab exhibited acceptable structural behavior based on the structural parameters of each test.

SOCIAL PERCEPTION AND FLORISTIC DIVERSITY OF ORNAMENTAL PLANTS IN URBAN GREEN AREAS OF PUERTO MALDONADO, PERU

Belmar Ccorimanya Usandivares — 2025-07-01

Increasing urbanization in biodiversity-rich regions such as the Peruvian Amazon poses significant challenges for urban landscape planning. This study evaluated the social perception and floristic diversity of ornamental plants in urban green spaces in the city of Puerto Maldonado, Madre de Dios Region, Peru. A structured survey and a floristic inventory of three main avenues of the city were administered to 291 residents. Social perception was measured according to aesthetic, ecological, social, and cultural dimensions; the floristic inventory was assessed using alpha diversity indicators such as species richness (S), dominance (Simpson D), and overall diversity (Shannon H). There was a predominantly positive perception toward ornamental plants, especially those of native origin. The floristic inventory identified 57 ornamental species, grouped into 27 botanical families, with Arecaceae, Apocynaceae, and Fabaceae being the most representative. Ecological indices showed high specific diversity with Shannon values greater than 2.5. Citizens showed a preference for native ornamental species, and the floral inventory recorded a high specific diversity in the three avenues evaluated.

Spatial Distribution Models of Hydrocarbons in Contaminated Soils and Their Implementation in GIS Software: A Review

Román Gamarra Torres — 2025-07-01

This review analyzes and compares the main models used to represent the spatial distribution of hydrocarbons in contaminated soils, with an emphasis on their implementation in Geographic Information Systems (GIS) environments. Two main approaches were identified: geostatistical methods such as ordinary Kriging and machine learning models such as Random Forest and 3D neural networks. Ordinary Kriging stands out for its balance between accuracy, uncertainty management, and GIS compatibility, compared to the greater complexity of advanced models. It is concluded that ordinary Kriging is the most appropriate model to represent this type of contamination, and its implementation with Python tools is recommended for achieving an automated, accurate, and accessible analysis.