Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

The objective of this article is to analyze the impacts that the tourism boom has had on the Ometepe Island Biosphere Reserve and identify the challenges to promote sustainable ecotourism. The study is based on a qualitative methodology with interviews to key informants and direct observation carried out in the second half of 2023. The results highlight positive effects of tourism in boosting the economy and generating income, but questionable effects in the cultural and environmental spheres. 

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The presented research had been written with the main task to be a support for students in electronic, mechatronic, and mechanic engineer, owing to share many experiences in the transduction analysis design and its applications. Moreover, this work is also proposed for researchers, who want to correlate the mathematical analysis with algorithms design based on adaptive and predictive criterion due to obtain optimal models, from which the physical parameters of a system can be find, it means to achieve them in order to obtain the mathematical model of the measured process as a consequence of theoretical models and the multivariable experimental analysis. The design of advanced sensors is an amazing task in the development of instrumentation for physical variables measurement in engineering processes, such as it is given in mechanics, thermodynamics and electromagnetism [Medina].  For this reason, in this research are described applications in temperature measurement of combustion motors or electrical motors, also the flow measurement of the fluid that transmit the energy to move hydraulic/pneumatic cylinders, furthermore the vibration measurement over the Active Magnetic Bearing (AMB) system to enhance unbalanced rotors, as well as in the sound measured and produced for Active Noise Control (ANC) systems. Consequently, the designed smart sensors have the advantage to correlate measured physical variables, which is supported on the processing algorithm to get adaptive estimations/predictions of the optimal measurement even under disturbances.

Este artigo apresenta uma reflexão sobre o conceito de maretório e sua relação com as lutas por direitos socioambientais das mulheres extrativistas costeiras e marinhas do litoral do Pará, na Amazônia brasileira. A pesquisa adotou uma abordagem qualitativa e exploratória, baseada em entrevistas, pesquisa documental, etnografias e registros em diários de campo, em diálogo com epistemologias feministas e ecoterritoriais latino-americanas. Argumentamos que o conceito de maretório ilustra um giro ecoterritorial, ao emergir do conhecimento situado de um grupo de mulheres extrativistas costeiras e marinhas. Embora frequentemente invisibilizadas pela literatura, elas protagonizaram mobilizações sociais que levaram à criação de áreas protegidas, como as Reservas Extrativistas Costeiras e Marinhas (RESEX MAR) no litoral do Pará. Além disso, apesar dos obstáculos impostos pela desigualdade de gênero, essas mulheres têm buscado ocupar espaços na cogestão dessas áreas, ao mesmo tempo em que ampliam sua atuação para diferentes arenas sociopolíticas, tanto em nível local quanto nacional e internacional. Nesse sentido, este estudo exploratório buscou contribuir para o debate sobre o conceito, ao demonstrar como ele adquire significado no discurso mobilizado por essas mulheres. Ao trazer para o centro da análise as experiências das mulheres extrativistas costeiras e marinhas, pretendemos ampliar a compreensão sobre o conceito e suas articulações nas lutas socioambientais.

La transición energética global está en marcha y está configurando nuevos paisajes y desafíos para las sociedades contemporáneas. El Renewables Global Status Report 2024 señala que, para el 2024, 151 países han fijado políticas nacionales de cero emisiones netas, y 90 países han implementado estrategias energéticas basadas exclusivamente en energías renovables. Sin embargo, este proceso no se limita a una cuestión técnica o económica; por el contrario, introduce transformaciones profundas en las formas de habitar, producir y distribuir el poder en nuestras sociedades, lo que invita a reflexionar sobre las consecuencias políticas y sociales de las transiciones sustentables (Swilling, 2019).

This cross-sectional study investigated the joint associations of moderate-to-vigorous physical activity (MVPA) and smartphone screen time (ST) with inhibitory control performance in 210 Brazilian school adolescents. MVPA level was assessed using the Global School-based Student Health Survey questionnaire, categorized as inactive (<60 min/day) or active (60+ min/day). Weekly ST was measured using participants’ smartphones, categorized as low (<7 h/day) or high (7+ h/day) based on the median. Participants were divided into four groups: inactive + high ST, inactive + low ST, active + high ST, and active + low ST. Inhibitory control performance was evaluated using the Flanker task, measuring reaction time and accuracy in congruent/incongruent stimulus. A generalized multiple gamma model revealed that only the inactive + high ST group showed a higher reaction time in the incongruent phase compared to the active + low ST group (β = 41.1 ms; 95% CI 2.3, 79.9; p = .038). No differences were found in the accuracy (p > .05). In conclusion, physical inactivity combined with high smartphone ST is associated with poorer inhibitory control performance in school adolescents.

Body expression has historically been established as a fundamental didactic strategy in physical education for developing body awareness. In early childhood education, it is essential for acquiring motor skills and abilities that enable children to function effectively in diverse contexts. Theater, as a performing art of multidimensional nature, presents significant potential for the development of Perceptual-Motor Abilities (PMA). This research evaluated the impact of a theatrical intervention on the development of PMA in students aged 5 to 8 years at Reggio Emilia school. A quantitative study with a pre-experimental single-group design with pretest-posttest measurements was implemented. The sample consisted of 22 students. An evaluation battery specifically designed and validated for the Colombian context was used to assess PMA. The intervention consisted of a structured didactic unit of eight 60-minute sessions, implemented over four weeks with a frequency of two sessions per week. Theatrical activities included body expression exercises, improvisation, dramatization of stories, role-playing games, and group stage productions, progressively designed to stimulate different dimensions of PMA. Statistical analysis was performed using parametric tests to compare the means between pretest and posttest. The results showed statistically significant improvements (p<0.05) in all variables related to the assessed PMA. It is concluded that theater constitutes an effective pedagogical tool for promoting the development of perceptual-motor abilities in children, suggesting its systematic incorporation into early childhood physical education programs.

The immune system is closely linked to the carcinogenic process, and it has been shown to respond to the effects of different varieties of exercise. Natural killer (NK) cells, as a part of the innate immune system, play a key role in the early stages of tumoral surveillance, as well as during treatment and recurrence risk. However, during oncological treatment, their role can be compromised by the adverse effects of chemotherapy or radiotherapy. Given this fact, physical exercise emerges as a promising non-pharmacological strategy for enhancing the immune function and improving body composition parameters, which impacts NK cells. This relationship, however, is still under study. The present opinion paper discusses the existing evidence concerning the response of NK cells and its relationship to changes in body composition in patients that exercise on a regular basis.

Body expression has historically been established as a fundamental didactic strategy in physical education for developing body awareness. In early childhood education, it is essential for acquiring motor skills and abilities that enable children to function effectively in diverse contexts. Theater, as a performing art of multidimensional nature, presents significant potential for the development of Perceptual-Motor Abilities (PMA). This research evaluated the impact of a theatrical intervention on the development of PMA in students aged 5 to 8 years at Reggio Emilia school. A quantitative study with a pre-experimental single-group design with pretest-posttest measurements was implemented. The sample consisted of 22 students. An evaluation battery specifically designed and validated for the Colombian context was used to assess PMA. The intervention consisted of a structured didactic unit of eight 60-minute sessions, implemented over four weeks with a frequency of two sessions per week. Theatrical activities included body expression exercises, improvisation, dramatization of stories, role-playing games, and group stage productions, progressively designed to stimulate different dimensions of PMA. Statistical analysis was performed using parametric tests to compare the means between pretest and posttest. The results showed statistically significant improvements (p<0.05) in all variables related to the assessed PMA. It is concluded that theater constitutes an effective pedagogical tool for promoting the development of perceptual-motor abilities in children, suggesting its systematic incorporation into early childhood physical education programs.

Our goal was to identify and critically review the main studies available that have aimed at showing the effects of occlusive training (OT) on people with chronic kidney disease (CKD). A systematic review was carried out following the PRISMA guidelines. A search for studies that reported on the effects of OT on CKD was carried out on three data bases (Pubmed, SPORTDiscuss and Scopus) from their earliest entries up to September, 2024. The PEDro scale was used to determine the methodological quality of the selected research. Three randomized studies were identified, of average to good methodological quality. These studies reported on the impact of OT on biochemical, hemodynamic and anthropometric variables, plus those linked to physical fitness. No adverse effects stemming from OT were reported. Similarly, attachment to the exercise program was good. Scientific evidence concerning the prescription of OT for people with CKD is limited. The results of studies published up to now indicate that OT may result in improvements at a hemodynamic level, even though its effects are not higher than those of other forms of physical exercise, which may be more advisable in order to achieve substantial changes in body composition and in muscle strength levels.