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Characterization of cross sections from old chestnut beams weakened by decay

This work aims to experimentally assess the material properties of old chestnut (Castanea sativa Mill.) cross sections weakened by decay. Specimens were taken from critical zones of twenty floor beams, mostly corresponding to their ending parts, in contact with granite masonry walls. These specimens were compared with clear wood specimens taken from non-decayed parts . The experimental campaign comprised of vi...

Dimensional variation of three softwood due to hygroscopic behavior

With the aim of monitor the hygroscopic behavior of three softwood species in situations of changes in its moisture content, an experimental program based on dimensional measurements, hygrometer readings and weightings procedure, was carried out. Maritime Pine (Pinus pinaster), Spruce (Picea abies) and Scots Pine (Pinus sylvestris) specimens were evaluated and compared. For each wood species, half of specimens ...

Vertebral Metrics: Application of a New Mechanical Instrument to Evaluate the S...

Objective: To present the results of the first application of the new technology - Vertebral Metrics - the analysis of the 3D position of the vertex of each spinous process in pregnant women.Material and Methods: The Vertebral Metrics was applied to women without associated pathology in four stages of pregnancy (12, 20, 32, 37 weeks gestation). We applied univariate linear models.Results: We found that the diff...

Métrica Vertebral: a Aplicação de uma Nova Tecnologia na Análise da Coluna Vert...

Objectivo: Apresentar os resultados da primeira aplicação da nova tecnologia – Métrica Vertebral – na análise da posição 3D do vértice de cada uma das apófises espinhosas, em mulheres grávidas. Material e Métodos: O Métrica Vertebral foi aplicado a mulheres, sem patologia associada, em quatro momentos da gravidez (12, 20, 32, 37 semanas de gestação). Aplicaram-se modelos lineares univariados. Resultados: Observ...

A tecnologia e os computadores não são sexuados

Cronologia

A termoeletricidade

Descubro a ferrovia por mero acaso

Do ponto de vista técnico foi a fase mais interessante da minha vida. A seguir ...

Eletrificação total do território