Journal of the University of Zulia

Editorial

2025-05-01T04:14:12+00:00

Editorial of Issue 46, Third Period, of the Journal of the University of Zulia (May-August 2025), dedicated to the Exact, Natural and Health Sciences, within the framework of the 78th anniversary of the journal.

Augmented Reality Model: Teaching Resource to Develop Mathematical Skills

2025-05-01T04:14:14+00:00

The article is the result of a thesis completed as a doctoral degree requirement at UMECIT University, Panama. The objective was set to evaluate the augmented reality model as a didactic resource for the development of mathematical competencies. The study used procedures from the positivist paradigm with a quantitative approach. The type of study was basic with a projective level in its initial phase, applicative in the second phase, and finally evaluative, with a non-experimental field design. Two questionnaires were applied to detect the weaknesses to be worked on in the model and one after its implementation to evaluate its effectiveness. In the first questionnaire, 8 mathematics teachers and 36 eleventh-grade students participated, providing information that served to diagnose the reality, as well as in the implementation of the model. The statistical analysis revealed that, in the "Conceptual Understanding" dimension, 50.0% of the participants managed to apply concepts to problem-solving, while in the "Mathematical Reasoning" dimension, 55.5% demonstrated the ability to analyze and solve problems. In the "Problem Solving" dimension, 66.6% managed to apply mathematical procedures effectively, and 61.1% managed to select appropriate strategies.

Sample Sizes and their Impact on Invariance and Psychometric Properties

2025-05-01T04:14:16+00:00

The objective of this study was to analyze the impact that various sample sizes have on psychometric indicators as well as on configural and metric invariance, in the scale used to measure women's leadership in educational administration. It is framed in the explanatory quantitative approach. The contributions of Arias (2008), Hernández (2014), Batista and Jordi (2004) and Gaskin (2016) allowed us to form the theoretical foundation that guided the research. The study was done with 271 women and 155 men from the Dominican Republic. The psychometric indicators showed validity and reliability in the information given by women and men; The goodness of fit indices agree with those suggested by Gaskin for a good fit: ΔCFI < 0.01; Therefore, it is concluded that women and men understood the approach of the items used in each of the integrated samples in the same way.

Chemical Studies on By-Products of Musa paradisiaca L. (Plantain, Dominico)

2025-05-01T04:14:17+00:00

Only 20-30% of the banana biomass is utilised; the rest, including the peels, is discarded, causing pollution. The peels, however, contain valuable bioactive compounds. The objective was to determine the chemical composition and antioxidant activity of Musa paradisiaca L. peels by applying physicochemical and chemical methods for the utilisation of these residues. For maturity grade 1 of the species, residual moisture, ash, crude fibre, fat and protein content were quantified. Potassium was identified as the mineral present in the highest proportion in the analysed shells. The high potassium content, with values of 6.130 % and 6.735 % for protein and fibre respectively, and the low fat content (0.109 g), make it a promising raw material for the production of functional foods and/or nutritional supplements. Kaemferol glycosides, quercetin and isorhamnetin were identified by LACA/MS/UV. 4.0 mg AGE of phenols and 2.48 mg AGE of tannins per 1 g of drug were quantified. Antioxidant activity, by DPPH and FRAP, showed 2.045 and 1.98 mg ET in 1 g of drug, respectively. The results obtained demonstrate the great potential of these peels.

Heavy Metals in Girls, Children and Teenagers with Autism Spectrum Disorders (ASD) in Barinas, Venezuela

2025-05-01T04:14:19+00:00

The autism spectrum disorders (ASD) are neuro biological, of origin polygenetic and ensue from a multifocal dysfunction of the development of the nervous system. These understand: autism, Asperger's syndrome, disorders of the development not specified and Rett's syndrome. To object to evaluate the presence of heavy metals as a factor of environmental risk associated with the development of the ASD in the Barinas municipality, Barinas state, Venezuela, his content was analyzed experimentally, by means of acid digestion and atomic absorption spectrophotometry in 23 samples (x3) of hair ofgirls, children and teenagers with ASD and ages understood between 6 and 18 years; incluing two individuals without ASD as control.The potentially toxic metals in children and teenagers were significantly (p<0,05) higher than those of the samples control, beingn times over his Reference Value maximum (RVmax); being n for: Lead=124; Cadmium=95; Nickel=156 and Aluminium=35. Though all values exceed the RVmax, there does not exist minimal measure or maxim established to determine his direct or indirect influence on the appearance of the ASD.

Comparison of Work Absenteeism in the Health Sector Chile - Brazil 2010-2020

2025-05-01T04:14:20+00:00

Medically justified absenteeism in the health sector is of great importance in Chile and Brazil. The objective of this study was to carry out a comparative study of absenteeism due to the use of medical leave for curative illness in the health sector. In the methodology, 15 research articles and theses on absenteeism in Chile and Brazil were analyzed. Disability rates (number of sick days per worker per year), frequency rate (number of medical leaves per year per worker) and severity rate (average duration of medical leaves) were analyzed and statistically compared. Based on the information analyzed, it was concluded that there are no statistical differences between the rates: incapacity, frequency and severity in absenteeism between Chile and Brazil, during the period 2010-2020.

Education as a Risk Prevention Strategy During Seismic Events

2025-05-01T04:14:21+00:00

The objective of this article is to analyze education as a risk prevention strategy during seismic events. Content analysis was used as a methodology, based on the analytical category: "Education in seismic risk prevention." Finally, a hermeneutical guide was used to interpret the data. The results reveal the following theoretical constructs: risk prevention in seismic events through collective education; knowledge of risk prevention; attitude and prevention; risk prevention practice; and educational intervention for risk prevention. In conclusion, through disaster education, individuals acquire cognitive, emotional, and ethical training that allows them not only to understand and understand their environment, but also to develop capacities and commitments to the environment and to risk and disaster reduction.

Destination Bran from a Post-Pandemic Perspective: A Systematic Review

2025-05-01T04:14:23+00:00

Introduction: Destination branding has undergone certain transformations in the literature since the start of the Covid-19 pandemic. Objective: This document analyzed the evolution of the destination brand concept from a post-pandemic perspective. Methodology: A systematic review was developed establishing trends from the reading of 55 documents verified through a quality process and being verified through inclusion and exclusion criteria. Results: The findings recognize the conception of the destination brand as the strategic management for the development of activities that promote responses in consumers and the adoption of values that facilitate identification with the territory and their probabilities of return. Even so, it is necessary to further assess some aspects that are related to it, such as sustainability and the development of identity and positioning due to the different contexts of the territories. Conclusion: This study allows to promote practices in the branding of places (cities) and thus generate economic, social and environmental development.

Characterization of the Tourism Service Provider Offering and the Tourism Outlook in Sabana Centro and Sumapaz, Cundinamarca, Colombia

2025-05-05T01:57:20+00:00

The objective of the study was to analyze the current state of tourism as a potential for development in 21 municipalities of the department of Cundinamarca-Colombia, based on the analysis of participation by categories of tourism service providers, in contrast with the evaluation of the diagnoses on which the mayors-elect 2024-2027 relied to build their proposals in the tourism component; study criteria based on the results of a research project that included the exploration and analysis of portals and official databases updated by categories of operators. Among the results, tourism housing was found to have the highest participation of service providers in the two provinces; on the other hand, the persistence of the digital gap within the sector, which includes the scarce use of digital platforms; a weak technical structuring of tourism diagnoses in the government programs that will become municipal development plans for four years, as well as the fragile allocation of resources within the line of strengthening the value chain in the department's tourism. The project is funded by the Universidad de Cundinamarca.