The development of radar altimetry over rivers along the past 20 years has shown a strong potential to provide hydrologist with valuable information on river water level dynamics. The development of new sensors and satellite mission concepts such as spatial interferometry or temporal interferometry opens midterm (10-20 years) perspectives for the spatialized measurement of river surface variabl...

We present a Lagrangian data assimilation experiment in an open channel flow above a broad-crested weir. The observations consist of trajectories of particles transported by the flow and extracted from a video film, in addition to classical water level measurements. However, the presence of vertical recirculations on both sides of the weir actually conducts to the identification of an equivalen...

Characterized by moderate and almost unchanging microbial growth, stability is an essential aspect ofcompost quality Low growth rates give benign organisms a competitive advantage over pathogens such as Sulnronellu and &fhrurn, which thnve m high-growth-rate conditions (Inbar et al., 1990). Also, stability prevents nutrients from becommg tied up in rapid microbial growth, allowing them to be av...

Structure exists in sequences ranging from human language and music to the genetic information encoded in our DNA. This thesis shows how that structure can be discovered automatically and made explicit. Rather than examining the meaning of the individual symbols in the sequence, structure is detected in the way that certain combinations of symbols recur. In speech and text, these repetitions fo...

One of the common concrete channels in irrigation networks is the semielliptical prefabricated channels. Manning formula is usually used to design these channels. The cross-sectional area and the wetted perimeter are required to be calculated in Manning formula. There are no analytical solutions to directly compute these parameters. Thus, numerical integration methods are inevitably used. In th...