Leakage up Faults: Production and Supply Concerns for “Topping Up” Sands

TOPping up ATR Activity

The nuclear protein kinase ATR is a key regulator of genome integrity that functions at checkpoints for damaged or incompletely replicated DNA. In this issue of Cell, Kumagai et al. (2006) shed light on the molecular mechanism that controls ATR. They report that a physical interaction between ATR and a distinct domain of TopBP1 greatly enhances ATR kinase activity.

Facing Up to Faults

As individuals, organisations and indeed the world at large have become more dependent on computer-based systems, so there has been an ever-growing amount of research into means for improving the dependability of these systems. In particular there has been much work on trying to gain increased understanding of the many and varied types of faults that need to be prevented or tolerated in order t...

Production Scale Up of Nanofibers: A Review

Biofuel supply chain and bottom-up market equilibrium model for production and policy analysis

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Derivations of UP-algebras by means of UP-endomorphisms

The notion of $f$-derivations of UP-algebras is introduced, some useful examples are discussed, and related properties are investigated. Moreover, we show that the fixed set and the kernel of $f$-derivations are UP-subalgebras of UP-algebras,and also give examples to show that the two sets are not UP-ideals of UP-algebras in general.