Comparative experiments were conducted between uniform and non-uniform stepped spillway profiles in a large-size laboratory facility. For each stepped configuration, the air concentration distributions matched the advective diffusion equation and the interfacial velocity was well correlated with a power law. A comparison of the air-water flow properties showed small differences in terms of numb...

Sustainable river management can be supported by models predicting long-term morphological developments. Even for one-dimensional models, run times up to several days simulations over multiple decades. Alternatively, analytical tools yield metrics that allow estimation of migration celerity and damping bed waves, which have potential being used as rapid assessment explore future We evaluate the...

The routing of bed material through channels is poorly understood. We approach the problem by observing and modeling the fate of a low-amplitude sediment wave of poorly sorted sand that we introduced into an experimental channel transporting sediment identical to that of the introduced wave. The wave essentially dispersed upstream and downstream without translation, although there was inconclus...

The objective of this article is to understand the use of technology in the practice of appeal court judges, judges and lawyers in the context of technology adoption of the lawsuit computerization in Brazil. The analysis is supported by the Multilevel Conceptual Framework proposed by Pozzebon and Diniz (2012). The social groups, interpretative schema, negotiation mechanism and technology in pra...

Abstract: A tidal bore is a positive surge taking place during the flood tide under macro-tidal conditions and the bore represents the leading edge of the tidal wave propagating upstream. The fundamentals of tidal bores remain unknown, although some physical experiments were performed during the last two decades. In this study, some physical modelling was performed to investigate the tidal bore...

Exist forms and criticalities of disfigurements of marine engines were studied from main propulsive engine, auxiliary facility and hull. Eddy current Non-destructive testing method was brought forward to disfigurement inspection of marine engines with advantages such as celerity and nicety. Cracks, as one form of disfigurements, testing of marine engines were demonstrated in detail, and the dev...

Rising sea levels, strong wave currents and destructive human activities put coastal areas at risk of erosion potential flooding. Several countermeasures have been introduced—both artificial natural—to tackle the issue. This study investigated effectiveness use hybrid polymer-made Xbloc walls mangrove root models for protection against water waves. One wall was made up three units stacked on to...