Zvi Calil' Columbia University and Tel-Aviv University This paper prespnts two ",flit-iE-lit concnrrf:'nt-read cone-uTfPnt-writE' parallel algorithms that find all palindromE's in a givPlI string: J. An ()(Io~ n) timf', n-[ITOCE'Ssor alp;orithm over general alphahets. In case of can· stant size alphahpts til(> <llgol'ithm fPquirps only lI.Jlogn processors, and thus achievps <til oplimal.spepdnp...

Let D be the ring of differential operators on a smooth irreducible affine variety X over C; or, more generally, the enveloping algebra of any locally free Lie algebroid on X. The category of finitely-generated graded modules of the Rees algebra e D has a natural quotient category qgr( e D) which imitates the category of modules on Proj of a graded commutative ring. We show that the derived cat...

Abiotic degradative pathways are often overlooked when evaluating natural attenuation at chlorinated solvent sites. Yet, at many sites, significant degradation of parent compounds such as 1,1,1-TCA, PCE and TCE is observed without the corresponding accumulation of daughter products, a sure indication of abiotic reactions. The problems in integrating abiotic processes into MNA are how to prove t...

Grey water is a kind of domestic wastewater including shower, bath, lavatory and laundry waters. waters without faecal waste can be considered as alternative sources in the place where resources are limited. In present study, removals COD, anionic non-ionic surfactants from grey via conventional (CFP) modified (MFP) Fenton oxidation processes was experienced. It determined that pH adjustment to...