Non-standard number representation has proved to be useful in the speed-up of some algorithms, and in the modelization of solids called quasicrystals. Using tools from automata theory we study the set Zβ of β-integers, that is, the set of real numbers which have a zero fractional part when expanded in a real base β, for a given β > 1. In particular, when β is a Pisot number — like the golden me...

In this paper we carried out a diachronic analysis (1840-2009) of a corpus of 180 medical case report titles drawn from the British Medical Journal. We analyzed a series of quantitative variables (number of authors and their institutional affiliation, title length, and punctuation/ grammatical data) and qualitative variables (authors’ collaboration and types of titles). The results of our resea...

Theodor Meyer’s 1908 doctoral dissertation, with Ludwig Prandtl (1875–1953) as his advisor, introduced much of what has now become basic gas dynamics: not only the Prandtl–Meyer expansion but also the oblique-shock-wave theory as well. It is arguably the most influential dissertation in all of fluid dynamics. Yet no biography or even a photograph of Meyer has been available in the intervening c...

Abstract We show the equivalence of several amenability type conditions for $$\hbox {C}^*$$ C ? -dynamical systems. As an application, based on Pimsner–Meyer construction, we give a new method to produce amenable actions simple -algebras.

For many many thousand years, mankind has been using various plants as nutrient, beverage, cosmetics, dye and medicine to maintain health and to improve quality of life. In Aisa, particularly, Panax ginseng C.A. Meyer is considered to be the most precious plant among herbs, and ginseng has been in the spotlight worldwide. Even in the Western world, where there are greatly advanced research faci...

In 1943 Adolf Meyer had been in the United States for 51 years. He had spent that time revolutionizing attitudes in American Psychiatry. Indeed, he had so single-handedly reshaped thinking in this field that, in that year, Dr. Arthur H. Ruggles, President of the American Psychiatric Association, had the following assessment of Meyer: As research worker, scholar and organizer, as professor of ps...

We provide a formal study of belief retraction operators that do not necessarily satisfy the (Inclusion) postulate. Our intuition is that a rational description of belief change must do justice to cases in which dropping a belief can lead to the inclusion, or ‘liberation’, of others in an agent’s corpus. We provide two models of liberation via retraction operators: σ-liberation and linear liber...

The clinical importance of dysplasia epiphysealis capitis femoris (Meyer dysplasia) is that it is easily mistaken for Legg-Calve-Perthes disease, leading to unnecessary diagnostic procedures and treatments. After a review of 578 children (619 hips) with Legg-Calve-Perthes disease, 17 children (27 hips) in whom both the clinical and radiologic pattern was obviously different could be found and a...