Digamacris n. gen. (Orthoptera, Acrididae, Melanoplinae) de la region atlantica meridional de Brasil

Este trabalho apresenta um checklist da fauna de Orthoptera, Caelifera (Acridoidea e Eumastacoidea), do estado do Rio de Janeiro, Brasil. Este artigo foi baseado no material depositado na Coleção de Orthoptera, Caelifera do Museu Nacional do Rio de Janeiro e em citações da literatura pertinente. Os resultados da pesquisa demonstram que os Caelifera do estado do Rio de Janeiro estão representados por duas superfamílias, Acridoidea e Eumastacoidea, quatro famílias (Proscopiidae, Ommexechidae, Acrididae e Romaleidae), subdivididos em 10 subfamílias, 16 tribos, 46 gêneros, 48 espécies e oito subspécies. Neste trabalho estão incluídas as listas de sinonímias para cada espécie, distribuição geográfica, localização dos tipos e principais referências bibliográficas. Checklist of Caelifera (Acridoidea and Eumastacoidea) of Rio de Janeiro State (Orthoptera) Abstract. This work presents a checklist of the fauna of Orthoptera, Caelifera (Acridoidea and Eumastacoidea), the state of Rio de Janeiro, Brazil. This article is based on material deposited in the Collection of Orthoptera, Caelifera the National Museum of Rio de Janeiro, and citations of relevant literature. The survey results show that Caelifera the state of Rio de Janeiro are represented by two superfamilies, and Acridoidea and Eumastacoidea, four families (Proscopiidae, Ommexechidae, and Romaleidae Acrididae), subdivided into 10 subfamilies, 16 tribes, 46 genera, 48 species and eight subspecies. This work includes the lists of synonyms for each species, geographical distribution, types and location of primary references.

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Effects of Ambient Temperature and Ni-content on Function Deterioration Process of Ti-Ni Shape Memory Alloy

Cho

Yamamoto

Sakuma

2011

Trans. Mat. Res. Soc. Japan

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In order to improve the durability of performance of actuator using shape memory alloy, the effect of ambient temperature and Ni-content on function deterioration process of Ti-Ni shape memory alloy is investigated. The function deterioration process is investigated by repeated loading-unloading tests with constant strain condition. The chemical compositions of specimens are Ti-50.1 at%Ni, Ti-50.3 at%Ni and Ti-50.6 at%Ni and the cold working ratio is 43.0 %. Heat-treatment condition is at 673 K for 3.6 ks. The ambient temperature range is from 353 to 473 K. The decrement of recovery strain decreases with increasing of ambient temperature. It is caused by the increase of applied stress with increasing ambient temperature. However, when applied strain is about 2 %, the decrement of recovery strain hardly increases with increasing ambient temperature up to 433 K. From this result, when the applied stress is less than about 2 %, this sample can be used under a high temperature consecutively. Meanwhile, the increasing of Ni-content leads to the increasing of applied stress. However, the decrement of recovery strain decreases with increasing Ni-contents. This tendency is interpreted to be caused by the increase of precipitates (Ti 3 Ni 4) and decrease of grain size with increasing Ni-contents.

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Digamacris n. gen. (Orthoptera, Acrididae, Melanoplinae) de la region atlantica meridional de Brasil

Cited by 3 publications

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Out of South America? Additional evidence for a southern origin of melanopline grasshoppers

Out of South America? Additional evidence for a southern origin of melanopline grasshoppers

Checklist de Caelifera (Acridoidea e Eumastacoidea) do Estado do Rio de Janeiro (Orthoptera)

Effects of Ambient Temperature and Ni-content on Function Deterioration Process of Ti-Ni Shape Memory Alloy

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