University of Rhode Island

About: University of Rhode Island is a education organization based out in Kingston, Rhode Island, United States. It is known for research contribution in the topics: Population & Bay. The organization has 11464 authors who have published 22770 publications receiving 841066 citations. The organization is also known as: URI & Rhode Island College of Agriculture and the Mechanic Arts.

Student‐recruited samples in organizational research: A review, analysis, and guidelines for future research

Abstract: Student-recruited sampling, a technique involving the use of student recruiters to find participants on behalf of a researcher, has been increasingly used in organizational research; yet there has been little attempt to understand its implications for the conclusions scholars draw from research. In this study, we meta-analyse studies of engagement and perceptions of politics in order to examine whether student-recruited sampling leads to samples that differ from other samples and whether those differences result in different observed relationships between variables. We found that student-recruited samples were not substantively demographically different from non-student-recruited samples. Further, we found few differences in the observed correlations of student-recruited samples compared with non-student-recruited samples; the differences found would not lead to different practical conclusions from the findings. We discuss the implications of these results for future studies and provide guidance for researchers, reviewers, and editors regarding the use of student-recruited samples in organizational research.

Laboratory models of the thermal evolution of the mantle during rollback subduction

Abstract: The subduction of oceanic lithosphere plays a key role in plate tectonics, the thermal evolution of the mantle and recycling processes between Earth's interior and surface. Information on mantle flow, thermal conditions and chemical transport in subduction zones come from the geochemistry of arc volcanoes1,2,3, seismic images4,5 and geodynamic models6,7,8,9,10. The majority of this work considers subduction as a two-dimensional process, assuming limited variability in the direction parallel to the trench. In contrast, observationally based models increasingly appeal to three-dimensional flow associated with trench migration and the sinking of oceanic plates with a translational component of motion11 (rollback). Here we report results from laboratory experiments that reveal fundamental differences in three-dimensional mantle circulation and temperature structure in response to subduction with and without a rollback component. Without rollback motion, flow in the mantle wedge is sluggish, there is no mass flux around the plate and plate edges heat up faster than plate centres. In contrast, during rollback subduction flow is driven around and beneath the sinking plate, velocities increase within the mantle wedge and are focused towards the centre of the plate, and the surface of the plate heats more along the centreline.

Portfolios in Teacher Education

Abstract: Les AA. proposent une analyse des portefeuilles dans le cadre de la formation des enseignants. Ils expliquent comment les portefeuilles peuvent servir a l'evaluation des programmes de formation, ils decrivent les characteristiques d'un portefeuille educatif et presentent la maniere dont un portefeuille se definit et se developpe