Practicing mentorship: Graduate-student supervision of undergraduate research assistants

Many research universities rely on graduate students to supervise undergraduate research assistants (RAs) who collect data and handle research logistics. This experience can be mutually beneficial, as RAs receive hands-on learning, and graduate students practice mentorship in preparation for assuming a faculty role. However, assistantships must be intentionally designed to meet educational (not just practical) goals. What training and support do graduate students receive to take on this mentorship role? In two surveys, RAs reported on their satisfaction, educational benefit, and desired changes; while graduate students reported on their goals, challenges, and the support they receive

Relações hipsométricas para plantios adensados de castanheira-do-brasil (Bertholletia excelsa) na Amazônia Central.

Neste trabalho, foram ajustadas 23 equações matemáticas com o objetivo de selecionar a que melhor descreva a relação hipsométrica em plantios adensados de castanheira

Boas práticas de fabricação como estratégia para impedir a contaminação de peixes frescos eviscerados por Salmonella.

As salmonelas são micro-organismos amplamente distribuídos na natureza e possuem como principal reservatório o trato intestinal homem e de aves. No caso de peixes, moluscos e crustáceos, a sua presença está relacionada, principalmente, com o manejo pós-despesca, o qual pode representar um risco sanitário e econômico para os entrepostos de processamento. A partir deste problema, objetivou-se nesse trabalho investigar possíveis causas para a contaminação de peixes eviscerados frescos por spp. em uma agroindústria de pescado.Organizado por: Sílvio Ricardo Maurano; AQUACIÊNCIA 2012

Ecological Effects of Fear: How Spatiotemporal Heterogeneity in Predation Risk Influences Mule Deer Access to Forage in a Sky‐Island System

Forage availability and predation risk interact to affect habitat use of ungulates across many biomes. Within sky‐island habitats of the Mojave Desert, increased availability of diverse forage and cover may provide ungulates with unique opportunities to extend nutrient uptake and/or to mitigate predation risk. We addressed whether habitat use and foraging patterns of female mule deer (Odocoileus hemionus) responded to normalized difference vegetation index (NDVI), NDVI rate of change (green‐up), or the occurrence of cougars (Puma concolor). Female mule deer used available green‐up primarily in spring, although growing vegetation was available during other seasons. Mule deer and cougar shared similar habitat all year, and our models indicated cougars had a consistent, negative effect on mule deer access to growing vegetation, particularly in summer when cougar occurrence became concentrated at higher elevations. A seemingly late parturition date coincided with diminishing NDVI during the lactation period. Sky‐island populations, rarely studied, provide the opportunity to determine how mule deer respond to growing foliage along steep elevation and vegetation gradients when trapped with their predators and seasonally limited by aridity. Our findings indicate that fear of predation may restrict access to the forage resources found in sky islands

On the Uq[sl(2)]{\cal{U}}_{q}[sl(2)] Temperley-Lieb reflection matrices

This work concerns the boundary integrability of the spin-s ${\cal{U}}_{q}[sl(2)]$ Temperley-Lieb model. A systematic computation method is used to constructed the solutions of the boundary Yang-Baxter equations. For $s$ half-integer, a general $2s(s+1)+3/2$ free parameter solution is presented. It turns that for $s$ integer, the general solution has $2s(s+1)+1$ free parameters. Moreover, some particular solutions are discussed.Comment: LaTex 17 page