منابع مشابه
Diffusion, confusion and functional MRI
Diffusion MRI has been introduced in 1985 and has had a very successful life on its own. While it has become a standard for imaging stroke and white matter disorders, the borders between diffusion MRI and the general field of fMRI have always remained fuzzy. First, diffusion MRI has been used to obtain images of brain function, based on the idea that diffusion MRI could also be made sensitive t...
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We show the first positive results for the indifferentiability security of the confusiondiffusion networks (which are extensively used in the design of block ciphers and hash functions). In particular, our result shows that a constant number of confusion-diffusion rounds is sufficient to extend the domain of a public random permutation.
متن کاملQuorum sensing and the confusion about diffusion.
Two hypotheses, termed quorum sensing (QS) and diffusion sensing (DS), have been suggested as competing explanations for why bacterial cells use the local concentration of small molecules to regulate numerous extracellular behaviours. Here, we show that: (i) although there are important differences between QS and DS, they are not diametrically opposed; (ii) empirical attempts to distinguish bet...
متن کاملTechnological infusion! Medical diffusion. Personal confusion?
I would like to thank the organizing committee for inviting me to make the opening speech in this conference, even though my appearance is unfitting, my status unsuitable, my interests irrelevant and myself detached from the present and the future of contemporary scientific developments, “advances and controversies.” On the basis of my academic past, I was asked to talk about the unpredictable ...
متن کاملStroke imaging: diffusion, perfusion, but no more confusion!
A fter attending numerous sessions dedicated to stroke imaging at national conferences, one cannot help but leave confused with unanswered questions because the presentations consist of diametrically opposed positions regarding the imaging of patients with acute stroke. For example, some presenters advocate for the use of advanced imaging techniques, while others maintain that noncontrast CT al...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1996
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed073p824.2