We prove that there exists a set S of n points in the plane such that every n-vertex planar graph G admits a planar drawing in which every vertex of G is placed on a distinct point of S and every edge of G is drawn as a circular arc. Submitted: October 2013 Reviewed: February 2014 Revised: March 2014 Accepted: April 2014 Final: May 2014 Published: May 2014 Article type: Regular paper Communicat...

The use of wind turbines to generate electricity has increased in recent years. One of the most important parts of a wind turbine is the foundation, which should be designed accurately because it is influenced by difference forces. Soil cannot carry tension stress; thus, when a wind turbine foundation is applied eccentricity forces, a gap appears between the soil and foundation. The gap will ha...

Abstract Background Owing to the large amounts of energy, greenhouse gases, and waste that it generates, construction industry is fundamental transition towards a circular economy. Indicators which show circularity products—and thus make them comparable with each other—can be used support implementation such an In this article, we have adapted material indicator Ellen MacArthur Foundation in or...

nowadays deep excavations are needed for construction of foundation of high rise buildings, providing space for parking and etc. in some cases deep excavations may be constructed in the vicinity of the subway tunnels and causes unpredicted extra displacements and internal forces in tunnel lining of tunnels which were not designed for them and consequently affect serviceability of tunnel. theref...

Bearing capacity of soil is an important factor in designing circular footing. It directly related to foundation dimensions and consequently its performance. The calculations for obtaining the bearing a needs many varying parameters, example type, depth foundation, unit weight soil, etc. In this work, comparison between values footing on gypseous before after improvement determined by two diffe...

A GREAT DEAL OF UNCERTAINTY exists regarding the effectiveness of safety incentive programs in construction. Most research on incentives involves case studies and theoretical analyses of their advantages and disadvantages. Using primary survey data from construction firms and craftworkers, this article examines the impact of incentives on the safety performance of U.S. construction firms. The s...

The role of the foundation in construction is crucial. Foundation planning aims to ensure that it can support loads up a specified safety limit, including maximum load may be encountered. serves as lower structure interacts with soil, providing stability and for superstructure. In this study, analysis focused on bearing capacity pile under lateral forces. Brinch Hansen method was employed deter...