Bridges, as an essential part of transportation system, play a special role in economy, politic and military all around the world. Serviceability of bridges is of high importance especially in emergencies, helping injured people and proportioning transportation after earthquakes. Earthquake regulation codes, normally suggest linear methods to conduct the analysis, and nonlinear analysis is bare...

red beds, conglomerates and salt were considered azoic and problematic rocks, but paleopalynology and inorganic geochemistry proved to be useful for placing them in time and space. in the early last century, in mexican ne region, only three mesozoic red bed units were differentiated, dated as late triassic to late jurassic. it was important tratigraphically to place them properly as they were c...

To account for the non-independence of individual observations within a year, and the large differences in sample size among groups, analyses were, where possible, performed on yearly means for the relevant sub-group. When appropriate, yearly means were squareroot or arc-sine transformed before analysis. All presented means and parameter estimates are back-transformed. All statistical analyses ...

the present study has been carried out with the aim of content analysis (ca) of newly-preparedtextbooks for social studies and science of the sixth grade based on the three environment education grounds, i.e.ecology, environment, and human activity. it is of caand descriptive nature. the statistical population was all thesixth grade textbooks pages and the statistical sample was equal to the st...