The levels of trihalomethanes (THMs)--the main species of by-product from water chlorination--were monitored in the distribution systems of the five major drinking water utilities of the greater area of Québec City in order to investigate and model their occurrence on a spatial and seasonal basis. Data for THMs and other water quality and operational parameters associated with their formation w...

A horizontal travelling heater method (THM) for growing cylindrical crystals from a partially filled solution zone has been investigated for the first time. By applying ampoule rotation, the whole cross section of the crystal is successively brought into contact with the liquid solution, which is effectively stirred by forced convection. This approach was used to grow single-crystalline Hgt_xCd...

The objectives of this research work was to evaluate the reduction of THM precursors by cationic pDADMAC and determine the correlations between the chlorine demand and trihalomethane formation in the presence of electrolyte solutions and ambient light. The chlorine demand was found to be significantly reduced provided that the H2SO 4 electrolyte was fed to the sample solutions. The amount of CH...

Geologic disposal is a promising solution for safe permanent isolation of accumulated high-level nuclear waste from powerplants. The behavior host rock highly coupled thermally, hydromechanically, and chemically. Numerical simulations such phenomena the extremely long term (>100,000 years) large length scale (>1 km) geologic remain to be computationally challenging. In this study, methodology h...

A construct ive learning algori thm dynamical ly creates a problem-specific neural ne twork architecture rather t h a n learning o n a pre-specified architecture. W e propose a parallel vers ion of our recently presented construct ive neural ne twork learning algori thm. Parallelization provides a computat ional speedup by a fact o r of O ( t ) where t is t h e number of training ezamples. Dist...

This paper is devoted to the study of Thermo-Hydro-Mechanical (THM) responses a porous rock with low permeability under thermal loading in context deep geological disposal radioactive waste. To this aim, numerical simulations benchmark exercise hypothetical high-level waste (HLW) repository were performed. considered as host formation Callovo-Oxfordian claystone (COx), which has been selected f...

In this paper, we first recall a previous favourable experience with the Schwarz type domain decomposition methods applied to problems of heat flow and elasticity [9, 11, 12] and then discuss a possible use of these methods for solving Darcy flow problems.

We prove that the model checking and the satisfiability problem of both Dynamic Logic of Propositional Assignments DL-PA and Coalition Logic of Propositional Control and Delegation DCL-PC are in PSPACE. We explain why the proof of EXPTIME-hardness of the model checking problem of DL-PA presented in [1, Thm 4] is false. We also explain why the proof of membership in PSPACE of the model checking ...

The paper describes the performance, observations and numerical interpretation of a full-scale in situ heating test conducted on Callovo-Oxfordian (COx) claystone Meuse / Haute-Marne (MHM) Underground Research Laboratory (URL) simulating heat-emitting, high-level radioactive waste disposal concept. In experiment, five heaters 3 m-long are placed axis microtunnel excavated COx to simulate heat p...