over preprint (3 Ergebnisse)

Softcover. 42 S. Ehem. Bibliotheksexemplar mit Bibl.-Signatur und Stempel. Guter Zustand, ein paar Gebrauchsspuren. Ex-library with stamp and library-signature on spine. Good condition, some traces of use. Q59/1 Sprache: Englisch Gewicht in Gramm: 200.

Zustand: Gut. 87 p. A good and very clean copy. - From the Introduction: Cancer treatment generally comes in four modalities. Traditionally, surgery of tumours was the most important form of treatment, while radiotherapy, chemotherapy and immunotherapy were introduced as new forms of cancer treatment in the course of the twentieth century. While chemotherapy and immunotherapy did not become standard forms of treatment until after World War II, X-rays and radium were used as alternatives to the surgical knife in eliminating cancer cells soon after their discovery at the end of the nineteenth century. This essay concerns the way in which radiotherapy for the treatment of cancer took shape, especially in Germany, in the first decades of the twentieth century. The analysis concentrates on two aspects. The first aspect is that of the struggle between the representatives of orthodox medicine, those using the scalpel in the fight against cancer, that is to say, general surgeons, internists, gynaecologists, dermatologists and oto-laryngologists, and those who perceived in rays a new, separate form of treatment of the cancer patient, i.e. the radiotherapists-to-be. When X-rays and radium were found to be effective in the combat against cancer, radiotherapists sought to create a niche of their own within the existing ecology of medical professions. In his System of Professions, Andrew Abbott argues that the establishment of a profession is best analysed in terms of tasks, jurisdiction and competition. The present essay illustrates that this infighting over radiotherapy took the form of a struggle for the cancer patient and for jurisdiction over the use of the new techniques such as X-rays and radium. Sprache: Englisch Gewicht in Gramm: 550 MPIWG copy of the original brochure.

Blum, Lenore (1942- ); Michael Shub (1943- ); Stephen Smale (1930- ). On a theory of computation over the real numbers' NP completeness, recursive functions and universal machines. Offset typescript. 1989. 64pp. 280 x 217 mm. Unbound; stapled. Very good. Rare Preprint Edition. "In computation theory, the Blum-Shub-Smale machine, or BSS machine, is a model of computation introduced by Lenore Blum, Michael Shub and Stephen Smale, intended to describe computations over the real numbers. Essentially, a BSS machine is a Random Access Machine with registers that can store arbitrary real numbers and that can compute rational functions over reals in a single time step. It is closely related to the Real RAM model. "BSS machines are more powerful than Turing machines, because the latter are by definition restricted to a finite set of symbols. A Turing machine can represent a countable set (such as the rational numbers) by strings of symbols, but this does not extend to the uncountable real numbers" (Wikipedia article on Blum-Shub-Smale machine). From the library of Martin Davis. .