Stone Mother

Stone Composition in Patients Who Undergo Renal Stone Surgery: Review of 423 Stone Analyses in Southern Iran

Stone Algebras

A range of algebras between lattices and Boolean algebras generalise the notion of a complement. We develop a hierarchy of these pseudo-complemented algebras that includes Stone algebras. Independently of this theory we study filters based on partial orders. Both theories are combined to prove Chen and Grätzer’s construction theorem for Stone algebras. The latter involves extensive reasoning ab...

‘Stone’-blindness

A 15-year-old boy with juvenile rheumatoid arthritis (JRA) and end-stage CKD was referred to us for renal replacement therapy. He was previously under follow-up with a paediatric unit. JRA was diagnosed at the age of 3/2 years when he developed polyarthritis and uveitis. He received steroids, sulphasalazine, non-steroidal anti-inflammatory drugs, calcium supplements (calcium phosphate) and vita...

Stone Formation

1. Urinary stones 1.1 Pathogenesis 1.2 Classification of stones 1.2.1 Calcium stones 1.2.2 Uric Acid Stones 1.2.3 Magnesium Ammonium Phosphate Stones, struvite or infection stones 1.2.4 Cystine 1.3 Risk factors 1.3.1 Non-genetic factors 1.3.1.1 Diet 1.3.1.2 Body size 1.3.1.3 Environment 1.3.2 Genetic factors 2. Other urological stones: Testicular microlithiasis 3. Biliary and gallbladder stones...

Stone coalgebras

In this paper we argue that the category of Stone spaces forms an interesting base category for coalgebras, in particular, if one considers the Vietoris functor as an analogue to the power set functor on the category of sets. We prove that the so-called descriptive general frames, which play a fundamental role in the semantics of modal logics, can be seen as Stone coalgebras in a natural way. T...