BACKGROUND Because of the shortage of health professionals, particularly in specialty areas, Rwanda initiated the Human Resources for Health (HRH) Program. In this program, faculty from United States teaching institutions (USF) "twin" with Rwandan Faculty (RF) to transfer skills. This paper assesses the twinning model, exploring USF and RF goal setting, satisfaction and perceptions of the effec...

The causes of temporal variation in the twinning rate are not always clear. As a consequence, the study of this variation has attracted the attention of several authors who were also interested in the correlation between twinning rate and human fertility. Prematurity, low birth weight, increased risk of infant death and long-term risk for morbidity associated with multiple gestations have been ...

The five-parameter grain boundary analysis has been applied for the first time to a titanium alloy. The boundary distribution was related to the b-to-a phase transformation and to deformation twinning. There was a very strong planes texture, only partially related to twinning, which did not diminish during long-duration, low-temperature annealing. 2007 Acta Materialia Inc. Published by Elsevier...

The unique concept of phase reversion involving severe deformation parent austenite into martensite, followed by annealing for a short duration, whereby the strain-induced martensite reverts to austenite, was adopted obtain nano-grained/ultrafine-grained (NG/UFG) structure in Cu-bearing biomedical austenitic stainless steel resulting high strength-high ductility combination. Work hardening and ...

We develop an analytical expression for twin nucleation stress in bcc metal and alloys considering generalized planar fault energy and the dislocations bounding the twin nucleus. We minimize the total energy to predict the twinning stress relying only on parameters that are obtained through atomistic calculations, thus excluding the need for any empirical constants. We validate the present appr...