Chemico-structural evolution of linguloid brachiopod shells
نویسندگان
چکیده
منابع مشابه
Micromechanical properties and structural characterization of modern inarticulated brachiopod shells
[1] We investigated micromechanical properties and ultrastructure of the shells of the modern brachiopod species Lingula anatina, Discinisca laevis, and Discradisca stella with scanning electron microscopy (SEM, EDX), transmission electron microscopy (TEM) and Vickers microhardness indentation analyses. The shells are composed of two distinct layers, an outer primary layer and an inner secondar...
متن کاملStructural Optimization of Free-Form Grid Shells
In the 21 st century, as free-form design gains popularity, free-form grid shells are becoming a universal structural solution, enabling merger of structure and façade into a single layer – a skin [1]. This paper shows some of the results of a research project concerned with the optimization of grid structures over some predefined free form shape, with the goal of generating a stable and static...
متن کاملEvolution of patterns on Conus shells.
The pigmentation patterns of shells in the genus Conus can be generated by a neural-network model of the mantle. We fit model parameters to the shell pigmentation patterns of 19 living Conus species for which a well resolved phylogeny is available. We infer the evolutionary history of these parameters and use these results to infer the pigmentation patterns of ancestral species. The methods we ...
متن کاملAn Evolution Strategy in Structural Shape Optimization Problems for Plates and Shells
1. Abstract The proposed strategy, similarly as classical ones (e.g. ACO, SS, PS or ISM) combines all features and advantages of evolution algorithms. It is worth to note that in the evolution strategy the number of children produced in one generation is not limited and it is not necessary to conduct mutation operations as in genetic algorithms. It simplifies significantly the effectiveness of ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Palaeontology
سال: 1999
ISSN: 0031-0239,1475-4983
DOI: 10.1111/1475-4983.00098