Traditional concrete has a limited fluidity and needs to be actively compacted. Its performance has now been scientifically surpassed by highly technological mixtures based on multiple blends of powders combined with specially designed admixtures, showing rheological properties that make the fresh material self-compacting [1]. In spite of its many advantages (reduced energy consumpti…
A Literary History of Medicine by the Syrian physician Ibn Ab? U?aybi?ah (d. 1270) is the earliest comprehensive history of medicine. It contains biographies of over 432 physicians, ranging from the ancient Greeks to the author’s contemporaries, describing their training and practice, often as court physicians, and listing their medical works; all this interlaced with poems and anecdotes. The…