Each year, in an attempt to stimulate journalism students' interest in medical writing, CMAJ sponsors the Amy Chouinard Memorial Essay Prize. The $750 award is in memory of Amy Chouinard, a longtime and valued contributor to CMAJ and the Canadian Journal of Surgery. Students from any recognized journalism program at a Canadian college or university are eligible to enter, and the deadline for 19...

The case report, which has a long history in medicine, has seen its fortune wax and wane with time. We discuss the challenges facing the continued survival of the case report, including the inability of journals to cope with the increased load and increased cost of publication, ethical issues, the impact factor and the rise of evidence-based medicine. We highlight the important role that the ca...

Competitive behavior has often been presented as the ultimate engine of economic, technological, and scientific progress. Since all such progress is likely to imply some measure of social benefit, competition has been widely praised in modern western culture. However, competition can have very negative effects on social wellbeing. An early example is known as the "tragedy of the commons." The c...

Authors of articles published in medical journals are often busy researchers who cannot afford time devoted to writing. Though they are experts in their own therapeutic area, more often than not, researchers find it difficult to actually write and publish their research. Professional medical writers with their expertise in writing clear, concise, comprehensible, and coherent content are often a...

‎In this paper‎, ‎first we develop the duality concept for $g$-Bessel sequences‎ ‎and Bessel fusion sequences in Hilbert spaces‎. ‎We obtain some results about dual‎, ‎pseudo-dual ‎and approximate dual of frames and fusion frames‎. ‎We also expand every $g$-Bessel ‎sequence to a frame by summing some elements‎. ‎We define the restricted isometry property for ‎$g$-frames and generalize some resu...

In this paper, we study approximate duals of $g$-frames and fusion frames in Hilbert $C^ast-$modules. We get some relations between approximate duals of $g$-frames and biorthogonal Bessel sequences, and using these relations, some results for approximate duals of modular Riesz bases and fusion frames are obtained. Moreover, we generalize the concept of $Q-$approximate duality of $g$-frames and ...

Interactive direct visualization of 3D data requires fast update rates and the ability to extract regions of interest from the surrounding data. We have implemented MultiValued Classification volume renderers on a general purpose multiprocessor graphics platform (Pixel-Planes 5) that are faster than any yet reported (2 -15 frames per second). We have joined one of them with a sophisticated syst...

$K$-frames as a generalization of frames were introduced by L. Gu{a}vruc{t}a to study atomic systems on Hilbert spaces which allows, in a stable way, to reconstruct elements from the range of the bounded linear operator $K$ in a Hilbert space. Recently some generalizations of this concept are introduced and some of its difference with ordinary frames are studied. In this paper, we give a new ge...

Controlled frames in Hilbert spaces have been recently introduced by P. Balazs and etc. for improving the numerical efficiency of interactive algorithms for inverting the frame operator. In this paper we develop a theory based on g-fusion frames on Hilbert spaces, which provides exactly the frameworks not only to model new frames on Hilbert spaces but also for deriving robust operators. In part...