PLoS Takes a Step Backward

PLoS Takes a Step Backward

Ntambwe Malangu The implementation of the comprehensive plan for the care, management, and treatment of HIV and AIDS in South Africa [1] needs to be supported by all. It is encouraging to note that Wilson and Blower [2] used South Africa to develop a novel method to determine the optimal strategy for allocating antiretroviral treatment (ART) sites among healthcare facilities (HCFs) in KwaZulu–N...

New GMC guidance takes a major, ethically flawed, backward step.

PIWI Takes a Giant Step

piRNA guides the action of PIWI proteins to silence deleterious transposons in animal reproductive tissues. Biogenesis of piRNA-induced silencing complex (piRISC) involves a multi-step process. In this issue, Matsumoto et al. report the first crystal structure of a PIWI-clade protein displaying a guide RNA, ready for action.

Student participation in disciplinary discourses: when the teacher takes a step back, who takes a step forward?

This study compares the participation patterns of students across two classrooms, which were involved in a design-based experiment called PATHS. While both classes followed the same curriculum, which encouraged disciplinary engagement in the subjects of history and science, the pedagogical stances of the teachers led to some noticeable differences in the “participatory roles” that students took...

Three Dimensional Laminar Convection Flow of Radiating Gas over a Backward Facing Step in a Duct

In this study, three-dimensional simulations are presented for laminar forced convection flow of a radiating gas over a backward-facing step in rectangular duct. The fluid is treated as a gray, absorbing, emitting and scattering medium. The three-dimensional Cartesian coordinate system is used to solve the governing equations which are conservations of mass, momentum and energy. These equations...