THE NATURE OF MIGRAINE
It was, therefore, also with some hesitation that I accepted the invitation, humbly realizing that I can bring my audience nothing new, and when now, I nevertheless venture to try to speak about the nature of migraine seen from my point of view after a long life of work with migraineological problems, I do it to a very limited extent only on the basis of my own experience, but first and foremost because I base my opinion on the facts with which friends and colleagues have enriched our knowledge through their research, not only through numerous literary publications and lectures, but also and not least through the answers to personal inquiries which I have received with thanks in the course of time.
Migraine, Epilepsy, Post‐traumatic Syndromes, and Spreading Depression
If it is now thought that vascular mechanisms cannot explain some of the clinical manifestations of migraine, epilepsy and head trauma, is there another mechanism which may unite them? Although unproven, it seems that the spreading depression of Leao may do so
Mathematical Modeling of Scour and Deposition
Electronic computers are opening up the field of sedimentation engineering by permitting the analysis of problems which heretofore have required too much time and effort. Movable stream bed profiles are being calculated in addition to water surface profiles. The initial gradation of sediment material in the stream bed may be prescribed to facilitate the calculation of an armor layer. This gradation is continually changed by the computer program in response to sediment particles being deposited on the stream bed and material on the stream bed being removed to satisfy transport capacity. Hydraulic sorting of sediment by grain size is accomodated. The stream bed does not have to be represented by a single grain size. Retardance of motion because of armor layer is calculated.