In this study, the effect of usage additives at different initiator ratios as well fillers types and grain distributions on resin consumption compressive strength polyester matrix composites were investigated. Orthophthalic unsaturated (UP) was used a matrix. The (methyl ethyl ketone peroxide) ratio 1.0%, 1.5%, 2.0% accelerator (cobalt octoate) 1.0% by weight to start polymerization. Silica, ba...

With the growing presence of BPM and SOA in the IT industry, their impact on the IT education will be profound. Many institutions are becoming aware of the acute need of developing learning and teaching resource frameworks for the BPM and SOA. In this paper, we present part of such an effort from a team at the University of New South Wales, currently developing Service Learning and Teaching Fou...

An increase in intracellular Ca2+ concentration ([Ca2+]) and morphological were simultaneously observed by epifluorescence and differential interference contrast (DIC) microscopy during fertilization of the sand dollar, Clypeaster japonicus. [Ca2+], which was detected by a Ca2+ indicator, Fluo-3, initially increased just beneath the sperm-attached site on the egg surface 8.6 sec after attachmen...

We summarize information concerning Recent and Pleistocene-Holocene Uruguayan sand dollars (Mellitidae), as well as Miocene taxa (Monophorasteridae). Recent and Pleistocene-Holocene species (Encope emarginata, Mellita quinquiesperforata, and Leodia sexisperforata) are at their southernmost limits of distribution, with only E. emarginata recorded further south than Uruguay. Lower temperatures to...

Many larvae and other plankton have complex and variable morphologies of unknown functional significance. We experimentally and theoretically investigated the functional consequences of the complex morphologies of larval sand dollars, Dendraster excentricus (Eschscholtz), for hydrodynamic interactions between swimming and turbulent water motion. Vertical shearing flows (horizontal gradients of ...

Abstract Concrete is one of the fundamental materials in construction industry. Typically, concrete composed sand, cement, aggregate, and added water to cement ratio. To enhance sustainability reduce negative effect on environment from industrial waste, recycling waste material into mixture becoming an area research by substituting some ingredients with recycled order amount fine natural aggreg...

The purpose of the present research is to assess impact foundry sand (FS) and cement kiln dust (CKD) on autogenous shrinkage, drying total shrinkage engineered cementitious composites (ECCs) over 100 d. Additionally, pore sizes their distribution in developed ECC system were assessed through BJH adsorption technique. findings showed that structure was refined continuously time. This indicates C...

This study is part of an ongoing investigation of biomarkers in iron foundry workers exposed to polycyclic aromatic compounds. Foundry workers with the highest exposures had elevated levels of DNA adducts in their white blood cells in previous studies. The purpose of this study was to characterize the nature of DNA reactive chemicals in foundry air samples through incubating the foundry filter ...

1, Ravi Shastri , 2, Anjani Kumar Singh , 3, Manish Kumar Singh 1, Asst. Prof. Cambridge Institute of Technology, Tatisilway, Ranchi, Jharkhand, India 2, Ph.D. Scholar, Materials and metallurgical Engineering National Institute of Foundry and Forge Technology, Hatia, Ranchi, Jharkhand, India 3, M.Tech, Materials Science and Engineering, National Institute of Foundry and Forge Technology, Hatia,...