A simple synthetic strategy was developed for the synthesis of well-defined multifunctional poly(amide)-based dendrimers using a trifunctional core.

We propose a new mesh refinement algorithm for computing quality guaranteed Delaunay triangulations in three dimensions. The refinement relies on new ideas for computing the goodness of the mesh, and a sampling strategy that employs numerically stable Steiner points. We show through experiments that the new algorithm results in sparse well-spaced point sets which in turn leads to tetrahedral me...

This article presents the research work related to the development of enhanced modulation technique with Orthogonal Time-Frequency Division Multiplexing (OFTDM). Utilization of well–localized bases allows to improve considerably the efficiency and robustness against intercarrier (ICI) and intersymbol interference (ISI) of now existing wideband wireless digital communication systems. Until recen...

Unsuccessful cementing operation can jeopardize the whole well construction process, resulting in further costly and time consuming repair operations. The quality of cementing job is dependent on the cement composition and its properties. Design of cement composition is based on the available geological condition, materials and technical situation at well location. The cement properties like fl...

Objectives: Because of the high rates of accidents, the construction industry has become a hazardous industry in Iran and therefore paying more attention is required. This paper investigates safety management in construction companies for improving workers’ safety as one of the ergonomics aims. Methods: In order to survey the safety management in construction companies a questionnaire was pr...

The operation elements of the construction project include quality, progress, cost, safety and so on. To ensure can make develop smoothly steadily. How to do a good job in management is focus industry. From this point view, paper puts forward number measures, which provide solutions for projects reference industry through improvement awareness, mode, control hazard sources other aspects.