Experimental investigation of sediment deposition on floodplains

River morphodynamics and sediment transportMechanics of sediment transpor

Experimental Study of Stage-Discharge Relationships for Flows over Radial Gates and Flap Gates

Weirs and Gate

Hyperbolicity preserving HLL solver for two-layer shallow-water equations applied to dam-break flows

River morphodynamics and sediment transportDebris and hyperconcentrated flow

Intercalation of Lithium Ions from Gaseous Precursors into beta-MnO2 Thin Films Deposited by Atomic Layer Deposition

LiMn2O4 is a promising candidate for a cathode material in lithium-ion batteries because of its ability to intercalate lithium ions reversibly through its three-dimensional manganese oxide network. One of the promising techniques for depositing LiMn2O4 thin-film cathodes is atomic layer deposition (ALD). Because of its unparalleled film thickness control and film conformality, ALD helps to fulfill the industry demands for smaller devices, nanostructured electrodes, and all-solid-state batteries. In this work, the intercalation mechanism of Li+ ions into an ALD-grown beta-MnO2 thin film was studied. Samples were prepared by pulsing (LiOBu)-Bu-t and H2O for different cycle numbers onto about 100 nm thick MnO2 films at 225 degrees C and characterized with X-ray absorption spectroscopy, X-ray diffraction, X-ray reflectivity, time-of-flight elastic recoil detection analysis, and residual stress measurements. It is proposed that forPeer reviewe

Software for the frontiers of quantum chemistry:An overview of developments in the Q-Chem 5 package

This article summarizes technical advances contained in the fifth major release of the Q-Chem quantum chemistry program package, covering developments since 2015. A comprehensive library of exchange–correlation functionals, along with a suite of correlated many-body methods, continues to be a hallmark of the Q-Chem software. The many-body methods include novel variants of both coupled-cluster and configuration-interaction approaches along with methods based on the algebraic diagrammatic construction and variational reduced density-matrix methods. Methods highlighted in Q-Chem 5 include a suite of tools for modeling core-level spectroscopy, methods for describing metastable resonances, methods for computing vibronic spectra, the nuclear–electronic orbital method, and several different energy decomposition analysis techniques. High-performance capabilities including multithreaded parallelism and support for calculations on graphics processing units are described. Q-Chem boasts a community of well over 100 active academic developers, and the continuing evolution of the software is supported by an “open teamware” model and an increasingly modular design

Use of high-resolution geographical databases for rainfall-runoff relation in urbanised areas

Distributed models are more and more used in regional hydrology. One of the main reasons is their essential compatibility with raster data in Geographical Information Systems. Also in urban hydraulics, distributed models are promising but their development depends on the availability of high-resolution data able to represent urban features. Public databases from satellite imaging are not yet adequate. The paper investigates the possibility of using other kinds of databases designed more specifically for cartography. The advantages and inconveniences of such an approach are pointed out, based on two actual examples. (C) 1999 Published by Elsevier Science on behalf of the IAWQ. All rights reserved

5.4 : Auto-apprentissage par Internet : une application à l'hydraulique à surface libre

An interactive open-channel hydraulics course on the Internet is presented This course, still under development, is intended to be used as a self-learning support. Therefore, a specific pedagogical approach has been adopted, dealing with the feeling of insecurity faced by an isolated student. Results of a first evaluation phase are reported. Those results show that, while the Internet offers new possibilities of knowledge dissemination, numerous technical and pedagogical skills are still required from the teachers who develop such tools.Un cours interactif d'hydraulique à surface libre sur Internet est présenté. Ce cours, encore en développement, est conçu pour être utilisé en auto-apprentissage. Par conséquent, une démarche pédagogique appropriée est mise en œuvre, entre autres pour rencontrer le sentiment d'insécurité que peut ressentir un étudiant isolé. Les résultats d’une première phase d’utilisation expérimentale sont présentés. Ces résultats indiquent que, si le réseau Internet semble offrir de nouvelles perspectives en matière de dissémination de la connaissance, de nombreuses compétences, techniques et pédagogiques, doivent encore être mises en œuvre par les enseignants s'ils souhaitent obtenir des résultats probants.Zech Yves, Bousmar Didier. 5.4 : Auto-apprentissage par Internet : une application à l'hydraulique à surface libre. In: Les logiciels de mécanique des fluides au service de l'industrie et de l'environnement. Congrès de la Société Hydrotechnique de France. 26èmes journées de l'hydraulique. Paris-Marne la Vallée, du 11 au 13 septembre 1998. 2000

Internet et enseignement : une expérience d'auto-apprentissage en hydraulique à surface libre

An experimentation of the Internet use for teaching purpose is presented. The object is the development of a self-learning support, based on an interactive course, on open-channel hydraulics. A specific pedagogical approach has been adopted, dealing with the feeling of insecurity faced by an isolated student. Results of a first evaluation phase are reported. Those results show that, while the Internet offers new possibilities of knowledge dissemination, numerous technical and pedagogical skills are still required from the teachers who develop such tools

Momentum transfer for practical flow computation in compound channels

A new theoretical 1D model of compound channels flows-the exchange discharge model-is presented. The interactions between main channel and floodplains are taken into account as a momentum transfer proportional to the product of the velocity gradient at the interface by the mass discharge exchanged through this interface due to turbulence. Geometrical changes in cross sections are also modeled; they generate a similar momentum transfer, proportional to the actual mass transfer. Both effects are incorporated into the flow equations as an additional head loss. This make the formulation suitable for stage-discharge computation but also enables practical water-profile simulations. The model is tested successfully against available experimental data for (1) stage-discharge relations; and (2) water-profile computation applied to a field case