This open access book presents a thorough look at tortuosity and microstructure effects in porous materials. The book delivers a comprehensive review of the subject, summarizing all key results in the field with respect to the underlying theories, empirical data available in the literature, modern methodologies and calculation approaches, and quantitative relationships between microscopic and macroscopic properties. It thoroughly discusses up to 20 different types of tortuosity and introdu...

I am running away from my past. Viper is the only man whose touch I don’t back away from. He makes me whole and for the first time I am hoping for a future. But my past is catching up with me and I have to betray the only person I ever loved. I am broken. Beyond repair. Painful times are ahead of me. By the time I free myself from the chains of my past it will be too late, because Viper will never be able to forgive me for what I have done to him.Fay is the first woman that got unde...

This open access book constitutes the proceedings of the 27th International Conference on Agile Software Development, XP 2026, which took place in São Paulo, Brazil, during April 8-11, 2026.XP is the premier agile software development conference combining research and practice. It is a unique forum where agile researchers, practitioners, thought leaders, coaches, and trainers get together to present and discuss their most recent innovations, research results, experiences, concerns,...