improvements in the properties of ordinary sidewall compound (nr/br) with the addition of epdm by reactive processing method were evaluated. the results show that ozone resistance of these sidewalls was improved with increased addition of epdm. also the tensile strength and elongation-at-break were increased in comparison with nrbrepdm compounds that were made by non-reactive processing. sem ph...

Abstract The replacement of synthetic fibers with natural in concrete has been recently investigated to counter the growing environmental and sustainable issues. Hemp are environmentally friendly used manufacturing composite materials. This paper reports on experimental assessment using hemp fiber reinforced polymer (HFRP) fabric sheets as an alternative carbon (CFRP) strengthen interior slab-c...

Database cracking has been an area of active research in recent years. The core idea of database cracking is to create indexes adaptively and incrementally as a side-product of query processing. Several works have proposed different cracking techniques for different aspects including updates, tuple-reconstruction, convergence, concurrency-control, and robustness. However, there is a lack of any...

Abstract The fracture resistance of different advanced high-strength steel (AHSS) sheets for automotive applications is investigated through conventional tensile tests, toughness measurements, and hole expansion tests. Different fracture-related parameters, such as the true strain (TFS), thickness (TTS), at crack initiation ( w e i ), specific essential work ratio (HER), are assessed. ) shown t...

Elucidating chemical changes in carbon fiber composites prior to physical degradation has been effectively demonstrated using handheld FTIR analyzers [1]. This application note shows that a handheld infrared spectrometer is equally effective at measuring early onset chemical changes in environmentally stressed PET polymer, which precede cracking and other physical degradation processes. This is...

Forming limit curves (FLC) of deep drawing steel sheets have been determined experimentally and calculated on the base of the material tensile properties following the Hill, Swift, Marciniak-Kuczyński and Sing-Rao methods. Only the FLC modeled from a singly linear forming limit stress curve exhibits good consistence with experimental curve. It was established that a linearized limit stress locu...

A novel strategy was proposed to anchor ultrafine metal nanoparticles (NPs) on thin carbon sheets for highly stable and efficient heterogeneous catalysts. In this facile approach, a dense monolayer of ultrafine AuNPs was sandwiched between a silica core and a resin shell, followed by carbonization of the shell at a high temperature and then selective removal of the silica core. The shrinkage of...

introduction: the information recorded in medical sheets can help us facilitate the treatment process, recognize the quality of performance of the medical staff, plan health care programs and make accurate and appropriate decisions. this study intends to compare the quality of recording information in admission and summary sheets of three hospitals in isfahan in the first six months of 1381. ma...