<p class="0abstract">This document is a report on the findings of a study aims to investigate human motivations affecting an adoption decision for smartphone among Peruvian university students. This research investigates smartphone users’ perception using a technology acceptance model (TAM). It is analyzed perceived ease of use, perceived usefulness and attitude toward to keep using a smartphone as determinants for behavioral intention to keep using a smartphone between Peruvian university students, evaluating them with reliability and validity and confirming the hypotheses elaborated for the study. Findings indicate that the behavioral intention to keep using a smartphone (BIU) was significantly influenced by perceived ease of use (PEOU), perceived usefulness (PU) and attitude toward to keep using a smartphone (AKUS) and also, PEOU influenced significantly to PU. This study not only provides valuable information about students´ the intention to keep using a smartphone but also enriches the current literature, focusing on Peru, which has a different commercial characteristic and cultural background as compared to North America, Europe, and Asia. According to the current literature review, this is the first study on this subject that specifically focuses on the use of smartphones by Peruvian university students.</p>

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The Argentine health system has three subsectors: private, social works, and public. It is essential to consider the user’s perceptions through studies that measure the intention to revisit, through self-perceived care quality, to obtain results from the health care process and adjust the services provided accordingly. A correlational, cross-sectional, and non-experimental study has been carried out. A total of 407 people were surveyed using a self-administered questionnaire with a five-point Likert scale. The model considered four variables: quality of the use of health programs, satisfaction, confidence, and revisit intention. Second-generation statistics were adopted through multivariate evaluation using partial least squares structural equation modeling (PLS-SEM) to calculate the correlation values between the study variables. The direct route between the quality of health services and satisfaction was not statistically significant, while the direct routes traced between the other constructs were statistically significant. This study contributes significantly to understanding how users determine the intention to re-choose a health service, explaining the indirect routes through which the quality of care relates to the intention to revisit.

Mixed martial arts (MMA) has always been surrounded by controversy due to the unusual muscle development of its participants, so it is crucial to know the strategies that have been implemented to reduce doping cases. The main purpose of this paper is to describe the various cases of doping detected by USADA in UFC MMA participants. In addition, strategies that are being developed to reduce cases of positive doping are proposed. From the UFC USADA database, doping cases were extracted, obtaining the substance or substances involved; the formula, physiological effect and the athletes involved; the dates of the sampling; if it was out of competition or in-competition and the sanction time. The substances that were most involved were found to be Ostarine (22), Clomiphene (9), Diuretics (10) and Stanozolol (9). Some sanctions were diminished because they were treated with contamination of supplements (cases of Ostarine) and cases of contamination of meat (Clomiphene). When contaminated supplements were reported, they were added to the list of high-risk supplements maintained as part of USADA’s online dietary supplement safety education and awareness resource—Supplement 411. There were also cases in which positive doping could be avoided through the early report of therapeutic use exemptions. The methodology that the USADA has implemented allows us to register the athletes with positive doping, check the risk of the supplements before being bought and provide a teaching portal. These efforts are necessary to implement in all countries in which MMA is practiced, avoiding the participation of doped martial artists.