High performance concrete (HPC) requires a low water-to-cementitious materials mass ratio (w/cm), often with the inclusion of supplemental cementitious materials such as silica fume in the mixture, thus necessitating the use of a superplasticizer. Because of the low w/cm and rapid reaction at early ages, proper curing from the earliest time possible is very essential in HPC. Internal curing has...

This work was developed to present a conceptual and preliminary analysis of the concepts criteria for estimating Energy Return on Investment (EROI). In this work, methods based monetary studies, Life Cycle Analysis (LCA) were discussed dynamical systems modeling proposed. respect, we made mathematical development, defining state auxiliary variables adjustment parameters necessary study problem....

A previous healthy 48-year-old Japanese man presented to our hospital with a 3-day history of a high fever and rash. Ten days after returning from a one-week visit to Malaysia on a business trip, he developed a fever, chill, sore throat, runny nose, arthralgia and rash. The patient reported no pain behind the eyes, coughing or abdominal symptoms. He did not remember his immunization history wel...