J. Rijsdijk

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• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the(More)
The threshold gradient for perception of a linear change in luminance with time has been measured as a function of the stimulus duration. These data are compared with the "De Lange" curves representing the flicker sensitivity measured with intermittent presentation of the stimulus as a function of the stimulus duration. For this purpose it is necessary to(More)
Flicker tresholds have been measured with intermittent stimuli as a function of the presentation time of the stimulus. The periods of flickering light were separated by 1-s dark intervals. Under these conditions the flicker threshold depends on the stimulus duration and on the number of cycles in the stimulus. The "De Lange" curves measured in this way can(More)
Mobile phone data are a new, unprecedented rich source to infer all kinds of mobility related information. The possibilities of mobile data are tremendous, i.e.: crowd images, frequencies of visits, foreign visitors, origin maps, traffic flows and OD-matrices can be generated locally, regionally and nationally and 24/7. The application fields are much(More)
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