The effects of natural organic matter (NOM), ferrozine, and AQDS (anthraquinone-2,6-disulfonate) on the reduction of hematite (alpha-Fe2O3) by Shewanella putrefaciens CN32 were studied. It has been proposed that NOM enhances the reduction of Fe(III) by means of electron shuttling or by Fe(II) complexation. Previously both mechanisms were studied separately using "functional analogues" (AQDS for...

We consider a class of eigenvalue problems involving coefficients changing sign on the domain of interest. We describe the main spectral properties of these problems according to the features of the coefficients. Then, under some assumptions on the mesh, we explain how one can use classical finite element methods to approximate the spectrum as well as the eigenfunctions while avoiding spurious ...

!8"6+' 3)*' ")**#1"2)*' 1:+3+*>)*' ),' DL$<' 3)*' 48*)*' 5)' 5#,,>)*' 3)9+283)*' #2217),:' 1,)' 7382)' +67#":8,:)<'*#1(),:'X'3Y#"+H+,)'5Y8773+28:+#,*'5+()"*)*.'I+:#,*'),:")'81:")*'Q#"5,):'Z%+33)"' ):' 83.<' -[[\]<' 3)*' 5+2:+#,,8+")*' ;)38' ZI#1":#+*<' F+34)"^:)+,<' -[[\]<' 3)' 3)9+K1)' %#"7?83#1' ZC#68"P' ):' 83.<' /\\_]<' 3)' 7"#`):' !87+33#,' Z%8,H)#:T$)")4#1"*' ):' 83.<' /\\a]<' ):2.' ;Y81:...

We consider a matrix pencil whose coefficients depend on a positive parameter ǫ, and have asymptotic equivalents of the form aǫ when ǫ goes to zero, where the leading coefficient a is complex, and the leading exponent A is real. We show that the asymptotic equivalent of every eigenvalue of the pencil can be determined generically from the asymptotic equivalents of the coefficients of the pencil...

The Offender Assessment System (OASys) is the risk assessment and management system routinely used in the National Offender Management Service (NOMS), the prison and probation service for England and Wales. This study describes the construction and validation of a new actuarial violence risk measure, the OASys Violence Predictor (OVP), using OASys and Police National Computer data. Ordinal logi...

Disinfection by-products (DBPs) have heterogeneous structures which are suspected carcinogens as a result of reactions between NOMs (Natural Organic Matter) and oxidants/disinfectants such as chlorine. Because of variability in DBPs characteristics, eliminate completely from drinking water by single technique is impossible. The current article reviews removal of the precursors and DBPs by diffe...

Issue du monde des bibliothèques (bibliothèques numériques en particulier), l’expression système d’organisation des connaissances (SOC, en anglais : Knowledge Organization System, KOS) « englobe tous les types de schèmes permettant d’organiser des informations et de promouvoir la gestion des connaissances » (Hodge, 2000). Les SOC « comprennent les schèmes de classification et de catégorisation ...

BACKGROUND Cancer and chronic disease are leading causes of death in the US with an estimated cost of $46 billion. METHODS We analyzed 11 million cause-specific deaths of US workers age 18-64 years in 30 states during 1985-1999, 2003-2004, and 2007 by occupation, industry, race, gender, and Hispanic origin. RESULTS The highest significantly elevated proportionate leukemia mortality was obse...