This paper provides a novel method to model lead crowned spur gears. The teeth of circular and involute crowned external spur gears are modeled for the same crowning magnitude. Based on the theory of gearing, mathematical model of tooth generation and meshing are presented. Effect of major performance characteristics of uncrowned spur gear teeth are studied at the pitch point and compared with longitudinally modified spur gear teeth. The results of three dimensional FEM analyses from ANSYS are presented. Contact elllipse patterns and other contact parameters are also studied to investigate the crowning effects. and Obsahuje seznam literatury
Casuistry is one of the most widespread methods of moral reasoning in contemporary bioethics. It is often found in opposition to the dominant theory of principlism. While theoretically, ethical principlism has been elaborated quite often in the Czech bioethical and medical-ethical literature, the theoretical definition of the casuistic method does not appear. This article, therefore briefly presents the theoretical foundations of the so-called casuist method. The historical context of the casuistry method, its advantages, and disadvantages are presented. In particular, it was compared with so-called deductivist approaches and principlism, which appear in contemporary bioethics as basic competing approaches. and Kazuistika či kazuistická metoda (casuistry) je jednou z nejrozšířenějších metod morálního rozvažování v současné bioetice. Bývá často považována za protiklad k dominantní teorii principialismu. Zatímco teoreticky byl etický principialismus v české bioetické a medicínsko-etické literatuře poměrně často rozpracován, teoretické vymezení metody kazuistické se spíše neobjevuje. Tento článek proto krátce představuje teoretické základy tzv. kazuistická metody. Jsou představeny historické souvislosti kazuistické metody, její výhody a nevýhody. Zejména byla porovnávána s tzv. deduktivistickými přístupy a principialismem, které se objevují v současné bioetice jako základní konkurenční přístupy.
The aim of this paper is to present the French historian Victor-Lucien Tapié, drawing on the years he spent in Bohemia with emphasis on translations of his writings and their reception. We focus on three main themes that pervade his work: people, nation and empire. We also consider his studies in art history, the Baroque and Classicism, and, related to this, his personal conception of the ‘history of civilization’.