The role of normal innervation in the regeneration of crustacean appendages has been illustrated in previous papers (Needham, 1945, 1946); it may, perhaps, be termed the 'central' factor in regeneration. In the present paper 'local' factors, such as properties of the tissues near the site of amputation, have been studied. The results of earlier work, chiefly on Amphibia, Planaria and Oligochaet...

the problem which has been the focus of city constructors and architectures since the beginning of citizenship life is the issue of the nature of environmental quality. this study, with a review of explaining paradigms of environmental quality and by reliance on basic works, has assumed the question of nature of environmental quality an interdisciplinary concept (civic construction, sociology, ...

introductionin the modern era of communication, by increasing population the resources would be relativelyscarce. therefore, in order to deal with environmental serious problems and complex humanclimaterelationship in all dimensions of spatiotemporal and land use planning and programmingpractices, the climatic zone map was a sustainable developmental tool in the study area.methodologythe climat...

Causality plays an essential role in reasoning about actions, and much of the research on the area deals with the problem of formalizing causality. In this article we pursue the idea that causality can be understood as an abstraction, and that one can write theories in which causality can be left implicit in the formalization of dynamic worlds. In particular, we identify one form of causality, ...