RESUMEN
Cory's shearwater, or Calonectris borealis, stands out as a symbolic figure in the world of seabirds, playing a crucial role in marine ecosystems globally. Belonging to the Procellariidae family, it is singularized by its imposing wingspan and intricate migration patterns connecting it to various regions from the North Atlantic to the Pacific. Its role in the marine food chain, specialized diet and adaptation for nesting in the Canary Archipelago underscore its ecological importance. However, Cory's shearwater also faces important threats, such as the invasion of foreign species, highlighting the need for its conservation. Among the conservation issues, studies on its biology, the main threats it faces and its normal anatomy are essential to preserve marine biodiversity. Additionally, a variety of imaging techniques, such as computed tomography and magnetic resonance, facilitates the understanding of the bird's neuroanatomy and opens future research possibilities in comparative neuroscience. Moreover, this approach proves particularly relevant given the increasing attention these seabirds receive in environments such as zoos, rehabilitation centers and their natural habitat, where veterinarians play a crucial role in their care and well-being.
RESUMEN
Calculus, the study of change in processes and systems, serves as the foundation for many STEM disciplines. Traditional, lecture-based calculus instruction may present a barrier for students seeking STEM degrees, limit their access to STEM professions, and block their potential to address society's challenges. A large-scale pragmatic trial with randomized student allocation was conducted to compare two calculus instruction styles: active student engagement (treatment condition) versus traditional, lecture-based instruction (control condition). A sample of 811 university students were studied across 32 sections taught by 19 instructors over three semesters at a large, US-based Hispanic-serving institution. Large effect sizes were consistently measured for student learning outcomes in the treatment condition, which demonstrates a new standard for calculus instruction and increased opportunities for completion of STEM degrees.
RESUMEN
El Laboratorio de Monitoreo del Aire de la Universidad de San Carlos de Guatemala, ha realizado desde el año 1994 el monitoreo de los contaminantes criterio partículas totales en suspensión -PTS y -PM - dióxido de nitrógeno, dióxido de azufre y lluvia ácida, en diferentes puntos ubicados en la Ciudad de Guatemala. Los resultados obtenidos confirman que existe deterioro de la calidad del aire, provocado por todos los contaminantes analizados. Esto sumado a la significativa prevalencia de enfermedades de carácter respiratorio, la cual puede estar relacionada con la mala calidad del aire, como principal causa de visita al sistema de salud pública del país, hace que una considerable cantidad de recursos públicos se destinen a la curación de personas enfermas, debilitando o eliminando la asignación presupuestal para la implementación de proyectos y políticas de desarrollo sostenible de beneficio a nivel local y regional.