Lock Up the Genome, Lock Down Research?

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Adaptive Fractional Delay Estimation without Lock-up

Gradient based algorithms for adaptive estimation of fractional time delay are known to suffer from lock-up phenomena to some extend. This is mainly due to errors in the gradient estimate which are on its term caused by interpolation errors. By studying the expected behavior of a class of stochastic descent algorithms, we are able to show that by replacing derivatives with finite differences, l...

Lock 'em up and Count 'em

Oh to be in Grendon now that group therapy's there. Frank Norman's book, sub-titled 'Reform of the Penal System', is not just a plea for psychiatric treatment of offenders and praise for Britain's first psychiatric prison, Grendon Underwood. But the mood is captured in the final chapter where he writes: 'Quite simply, in Sweden, the penal authorities take a far more enlightened view of criminal...

RH Lock: A Scalable Hierarchical Spin Lock

Scalable architectures with non-uniform memory access time (NUMAs) have gained increased popularity in recent years. The increased scalability have increased the demand for scalable lock implementations, such as the queue-based locks of Mellor-Crummey and Scott (MCS lock), and of Craig, Landin and Hagersten (CLH lock). This paper demonstrates that the first-come first-served nature of queue-bas...

Sable Research Group Component - Based Lock Allocation

The choice of lock objects in concurrent programs can affect both performance and correctness, a burden of complexity for programmers. Recently, various automated lock allocation and assignment techniques have been proposed, each aiming primarily to minimize the number of conflicts between critical sections. However, practical performance depends on a number of important factors, including the ...