Amazonia Investiga

Conceptual understanding of systems of Linear Equations in secondary education: a didactic proposal using GeoGebra

Tue, 30 Jun 2026 00:00:00 +0000

This study presents a teaching proposal aimed at strengthening secondary school students’ understanding of Systems of Linear Equations (SLE) using GeoGebra software, based on Duval’s Theory of Semiotic Representation Registers and the ACE Cycle derived from APOS Theory. A didactic sequence was designed and implemented, consisting of activities focused on the conversion between algebraic and geometric representations. The proposal was applied to a group of 48 students from a secondary school in Mexico. The analysis of the results shows that the use of the digital tool GeoGebra enables students to visualize geometrically the solutions of a SLE, thereby enhancing their understanding. Students were able to recognize that a unique solution corresponds to the intersection of two lines at a single point, infinitely many solutions correspond to coincidence lines, and no solution corresponds to two lines that never intersect. By solving these systems algebraically and analyzing them geometrically, students demonstrated improvements in their reasoning, argumentation, and logical thinking skills. It is concluded that the integration of technology with mathematical topics is a fundamental resource for improving the teaching and learning of SLE at the secondary education level.

Impact of digitization on the competitiveness of SMEs: A qualitative study with 486 actors in the Mexican business ecosystem

Carlos Javier Hernández Vargas, Ivette Medina Mata, Juan Camilo Cardona Castaño — Tue, 30 Jun 2026 00:00:00 +0000

Digitalization represents a strategic element for the development and strengthening of business competitiveness in dynamic and rapidly changing environments. However, a digital gap persists in Mexico, limiting the adoption of technological tools among micro, small, and medium-sized enterprises (MSMEs), mainly due to economic, technological, and training resource constraints. In this context, qualitative studies aimed at understanding entrepreneurs’ perceptions of technological adoption remain scarce in the specialized literature. Therefore, the present study seeks to understand how entrepreneurs perceive digitalization as a strategy that enhances competitiveness in Mexican MSMEs. The research employs grounded theory as its methodological approach, framed within the resource-based view theory and developed under an inductive approach. Based on a sample of 486 semi-structured interviews conducted with entrepreneurs, consultants, academics, chamber representatives, and government officials, the following emerging categories were identified: competitiveness, digitalization, digital marketing, advantages, and barriers. The results suggest that digitalization is perceived as a strategic resource capable of contributing sustainably to the strengthening of business competitiveness.

Gamification and pedagogical innovation: impact on the learning of lyrical genre in school settings

Tue, 30 Jun 2026 00:00:00 +0000

Secondary Language and Literature education requires innovative pedagogical frameworks aligned with digital ecosystems to enhance student engagement. This study evaluated the impact of a gamified pedagogical strategy on the academic performance of first-year high school students ($N = 70$). A quantitative, quasi-experimental, cross-sectional design was deployed, dividing participants into an experimental group ($n = 35$) and a control group ($n = 35$). The five-week intervention integrated a Google Sites environment powered by interactive activities on Educaplay and Kahoot. Data analysis via the non-parametric Mann–Whitney U test revealed significant academic improvements in the experimental group ($p < .001$), with a remarkably large effect size ($r = .83$). Beyond quantitative academic optimization, qualitative tracking indicated a substantial increase in students' intrinsic motivation, proactive participation, and behavioral commitment toward textual analysis and poetry comprehension. These outcomes demonstrate that systematic gamification effectively subverts traditional passive learning paradigms, offering a scalable instructional model for secondary education.

Navigating the investment and securities Act 2025: A comparative legal framework for cryptocurrency regulation in Nigeria

Ugochukwu Godspower Ehirim — Thu, 28 May 2026 00:00:00 +0000

The growing popularity of cryptocurrencies across the globe has generated concerns. The phenomenon has challenged existing financial regulatory frameworks prompting countries to consider partial or absolute recognition of the medium as tradable securities, for exchange or settlement of accounts, after the manner of fiat currency, but parallel to it. Fundamentally, the aim of this paper is to ascertain whether cryptocurrencies may lawfully be used, and to what extent in Nigeria. The study engages the doctrinal (conceptual) methodology for legal research which is basically library based, leveraging primary and secondary source materials for the rigorous analysis. With particular focus on the Investment and Securities Act 2025 the paper makes a structured analysis and review of relevant regulations on securities and currencies in Nigeria to determine: i). whether all manifestations of cryptocurrencies were within the contemplation of statute, and ii). the effect of the new law on the legality or otherwise of virtual assets in Nigeria. The result reveals at first, that the debate on legal assessment of cryptocurrencies persists and issues are still not fully resolved; second, the status and nature of digital currency presents it as a specie of electronic promissory note capable of creating legal obligations and values enforceable by judicial process if properly harnessed. In concluding, the paper asserts that cryptocurrency could be traded on the stock market and licensed bureau de change platforms like other foreign currencies with the right statutory atmosphere and such trades would enrich Nigeria’s tax economy as it is the case with Canada.

Phytochemical profile and physicochemical characterization of the endemic vine Tynanthus croatianus (Bignoniaceae) in Costa Rica

Mon, 02 Mar 2026 00:00:00 +0000

Traditional medicine utilizes species of the Bignoniaceae family to treat diabetes, malaria, and leishmaniasis. However, Tynanthus croatianus, an endemic vine from Costa Rica, lacks comprehensive phytochemical studies validating its potential therapeutic use. Objective: This study aimed to characterize the secondary metabolites in T. croatianus stems using solvents of varying polarity and to determine the physicochemical properties of the aqueous extract. Methods: Stem samples were collected in Puntarenas, Costa Rica. Extracts were prepared via maceration using distilled water, ethanol (96%), methanol, and chloroform. Qualitative phytochemical screening (Dragendorff, Shinoda, etc.) and physicochemical analyses (pH, specific gravity, UV-Vis spectroscopy) were performed. Results: Phytochemical screening revealed the presence of flavonoids, terpenes, gallic tannins, catechins, and steroids across all extracts. Notably, alkaloids were detected in ethanolic and methanolic phases but were absent in aqueous extracts. The aqueous solution exhibited an acidic pH (5.61) and a specific gravity of 0.9977. UV-Vis analysis indicated the presence of low-molecular-weight compounds, likely sugars and terpenes. Conclusion: T. croatianus possesses a diverse metabolic profile rich in antioxidant and antimicrobial candidates. These findings provide a scientific baseline supporting its ethnopharmacological potential and justifying future in vitro and in vivo bioactivity assays.