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| J. H. Lee. |
| This paper examines the stiffness matrix of two-dimensional statically indeterminate truss structures. Using Mathcad, a stiffness matrix analysis of a truss problem is completed as a template for other sorts of problems. This allows learners to understand the stiffness matrix theory and rapidly acquire the basic concepts of analysis theory. As is shown in the example, the transformation of the matrix is apparent and the overall structure of the stiffness matrix can be easily constructed. Unknown reactions and member forces caused by unknown displacement were calculated as well. In addition, the problem of the 20 bar boundary condition sensitivity penalty method explained in the example 2 for structure... |
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Palavras-chave: Civil structure analysis and construction truss; Stiffness matrix; Mathcad; Penalty method; Structure analysis. |
| Ano: 2012 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1403 |
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| Sacristán,M; Millanes,Am; Fontaniella,B; Legaz,Me; Vicente,C. |
| Secreted arginases from Evernia prunastri and Xanthoria parietina thalli, exhibiting lectin activity, have been purified to homogeneity. Analyses of both amino acid and glycoside composition are reported. Purified proteins have been subjected to tryptic digestion and some amino acid sequences have been analyzed. An undecapeptide from Evernia arginase, which shows some degree of homology with the domain to which Mn²+ binds, a heptapeptide and an undecapeptide from Xanthoria arginase have been analyzed, and homologies with some arginases from other fungi and plants have been found. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evernia prunastri; Xanthoria parietina; Arginases; Lectins; Structure analysis. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572008000100021 |
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