There are a large number of concrete bonding interfaces in assembled structures. Moreover, the problems deformation and coordination at lead to weak under shrinkage creep. The theoretical methods analytical solutions for long-term performance composite structures recent literatures relatively complicated review or optimization design stage. Hence, method calculating mid-span deflection cross-se...

Abstract The digital economy is increasingly seen as an essential cornerstone in developing national strategies and industrial policies to enhance competitiveness. On the other hand, a realistic assessment of readiness for appropriate policies. In our paper, we group countries European Union (EU) using three different methods applied dataset consisting four main dimensions EU's Digital Economy ...

The aim of this study was to investigate the effect of antagonist material and configuration on combined wear, which was produced by alternating toothbrush wear and simulated occlusal wear on one specimen. Worn volume and maximum worn depth comparisons were done using two antagonist materials (steel and ceramic) and two antagonist configurations (flat and round). For the material factor, worn v...

This study conducts a capacity factor calibration for steel and steel-concrete composite columns with helical seam pipe (also known as spiral welded tube) sections considering the following three member types: (i) under axial compression, (ii) concrete-filled tubes (CFSTs) (iii) CFSTs combined compression uniaxial bending due to load eccentricity. The has been conducted both forward inverse rel...

in this study, aluminum (al) matrix reinforced with micro-particles (30 µm) and nano-particles (50 nm) boron carbide (b4c) were used to prepare al-2.5%wt., b4c nano-composite and micro-composite, respectively, using mechanical alloying method. the mixed powders were mechanically milled at 5, 10, 15 and 20 hrs. the xrd results indicated that the crystallite sizes of both the micro-composite and ...

this paper investigates axial compression process of multi-layered tubes with circular cross-section under the axial loading in the quasi-static condition using experimental method. some specimens are prepared in seven different groups, namely; empty carbon/epoxy composite tubes, solid carbon/epoxy composite rods, empty copper tubes, composite tubes with silicon sealant filler, concentrically s...

background: medical education need to efficient teaching programs and the importance of lesson plans is irrefutable in promoting of education. this study aimed to use the assure model in studying the knowledge and attitudes of university faculty members' about the lesson plan at 2013 years. methods: the study was a descriptive analytical study and the study population was consisted of universit...

leadership is important for nurturing employee creativity. although how leaders can influence employee creativity is somehow unclear, previous studies show that leadership can enhance employees’ willingness to share knowledge. this study examines how leader-member exchange (lmx) affects employees’ creative work involvement through knowledge sharing. data (n=385) was collected utilizing a questi...

background: although composite restorations are really valuable for esthetic zones, they have shown less longevity rather than amalgam restorations. since it may be related to the method used for curing the composite, postcuring could increase the degree of conversion and result in more long‑lasting composite restorations. this study was planned to evaluate the effect of two different postcurin...