This paper analyses the organization of the Government Code and Cypher School (GC & CS) at Bletchley Park during the Second World War. The complexities and peculiarities of the organization are overviewed and a periodization provided. The main focus is on the pivotal 1942 reorganization which is explained in terms of the changing scale of GC & CS following the successful attack on the Enigma ma...

A novel eccentric paddle mechanism based on the epicyclic gear mechanism (ePaddle-EGM) has been proposed to enhance the mobility of amphibious robot for multi-terrain tasks with diverse locomotion gaits. This paper presents a brief description for this mechanism. Based on the feature of ePaddle-EGM, a unique non-reciprocating legged gait planning method is proposed. This method could minimize t...

It is time to make changes to the current research evaluation system, which is built on the journal selection. In this study, we propose the idea of continuous, dynamic and comprehensive article-level-evaluation based on article-level-metrics. Different kinds of metrics are integrated into a comprehensive indicator, which could quantify both the academic and societal impact of the article. At d...

A brief history and description of the ̄rst four models of the Enigma cipher machine, designed for the commercial market, taken in part from the authors' book [1].

Laser-induced damage has always been and remains as vexing as it is expensive. Despite a quarter century of work, the problem has not been eliminated or even fully defined-only the technical limits have been increased. Although dielectric thin films have improved over the last 25 years, they remain especially difficult subjects to deal with owing to the multiparameter nature of the nonequilibri...