Micrometeorite collections: a review and their current status.

Micrometeorites are estimated to represent the main part of the present flux of extraterrestrial matter found on the Earth's surface and provide valuable samples to probe the interplanetary medium. Here, we describe large and representative collections of micrometeorites currently available to the scientific community. These include Antarctic collections from surface ice and snow, as well as glacial sediments from the eroded top of nunataks-summits outcropping from the icesheet-and moraines.

An Interprofessional Faculty Development Program for Workplace-Based Learning.

Background: Most faculty development programs in health professions education, pivotal in cultivating competent and effective teachers, focus on systematic, planned and formal learning opportunities. A large part of clinical teaching however, encompasses ad-hoc, informal and interprofessional workplace-based learning whereby individuals learn as part of everyday work activities. To fully harness the educational potential embedded in daily healthcare practices, prioritizing interprofessional faculty development for workplace-based learning is crucial.

Simulation at the Frontier of the Zone of Proximal Development: A Test in Acute Care for Inexperienced Learners.

Purpose: Vygotsky's zone of proximal development (ZPD) refers to the space between what learners have mastered and what they should master in the next developmental stage. Physicians' tasks are ZPD activities for medical students, with high-acuity tasks such as resuscitation representing activities at the ZPD's frontier. This type of task can be taught and assessed with simulation but may be demanding and stressful for students.