In Advances in Engineering Research. Volume 26, sodium dodecyl sulfate and hydroxy isopropyl chitosan are employed as modulation agents for crystallization of CaC2O4. The effects of these concentrations on the crystallization are investigated, and the CaC2O4 particles are characterized by scanning electron microscopy, powder X-ray diffraction, thermogravimetric analysis and Fourier transform infrared spectroscopy. The authors examine a novel flash ironmaking technology, developed by Professor H.Y. Sohns research group at the University of Utah, which has shown promising results for the production of iron from iron ore concentrate with low energy consumption/greenhouse gas emissions. Computation fluid dynamics has been used to simulate the novel flash ironmaking process from the kinetics analysis of the results obtained in laminar-flow reactors to the laboratory scale Utah flash reactor and the large scale bench reactor. This collection goes on to review recent data on composite materials intended for repairing mechanochemical and technological damages of metallic pipelines. The technological aspects of repairing gas and oil pipeline surfaces and their joints and couplings in field conditions are analyzed, and methods used to improve the strength of the adhesive layer are considered. Next, several mega-structural projects for regulation of the economic and ecological impacts of global sea-level rise in the Mediterranean Sea Basin are detailed. In particular, one macro-project, a modernized installation sited within the Strait of Gibraltar composed of a single fabric submarine curtain and super-ropes, is closely examined in terms of its sea-level rise macro-problem solving suitability. Lastly, a new method based on subsampled contourlet transform and feature smoothing technique is presented for automatic classification of seabed square-size images. This new version of standard contourlet transform allows for the study of images with various resolution levels and directions. This proposed method is implemented using graphics processing unit capabilities to reduce execution time.