DDI Timeline

Diffusion Directions Imaging (DDI)

Di usion magnetic resonance imaging (dMRI) is the reference in vivo modality to study the connectivity of the brain white matter. Images obtained through dMRI are indeed related to the probability density function (pdf) of displacement of water molecules subject to restricted di usion in the brain white matter. The knowledge of this di usion pdf is therefore of primary importance. Several metho...

The DDI Approach to Morphology

DDI stands for “Don’t Do It.” White (1980) used the acronym DDI in a delightful paper on garbage collection. He argued 25 years ago that the garbage collector should be run rarely – perhaps once a year – if at all. That’s pretty much how many of us work these days. We buy enough memory so we don’t have to clean up more than once a week. Rebooting is easier than garbage collecting. As for disks,...

Locating the Geographic Center of DDI 3.0

Timeline Localization

The research findings provide evidence that time-oriented data visualizations can contribute to faster information processing, better understanding and improved recall. Thus, they are used in many application domains – medicine, law enforcement, traffic and navigation control to name but a few. Simultaneously, human’s time perception varies depending inter alia on culture, language, personal ex...

Representing and utilizing DDI in relational databases

Alerk Amin, CentERdata [[email protected]] Ingo Barkow, DIPF Leibniz Institute for Educational Research and Educational Information [[email protected]] Stefan Kramer, Cornell Institute for Social and Economic Research [[email protected]] David Schiller, Research Data Center (FDZ) of the German Federal Employment Agency (BA) at the Institute for Employment Research (IAB) [[email protected]]...