Generic algebraic libraries run the risk of losing eeciency compared to non-generic libraries. To solve the seeming antagonism between genericity and eeciency, we propose a technique which we call lifting. The lifting process is an abstraction process which starts with a well-known eecient algorithm and abstracts carefully from it. As lifting guarantees that fast non-generic algorithms instanti...

Diffusion limited aggregation (DLA) is a modelling technique for simulating dendritic growth that has seen widespread application in the physical, biological, and social sciences. We introduce an artistic component to the basic technique by adding special effects parameters to a single particle, random walk DLA aggregation scheme. Our goal is to explore the potential of the enhanced scheme as a...

Assuming that damped Lyman-α (DLA) systems are galactic discs, we calculate the corresponding evolution of metal abundances. We use detailed multi-zone models of galactic chemical evolution (reproducing successfully the observed properties of disc galaxies) and appropriate statistics (including geometrical propability factors) to calculate the average metallicity as a function of redshift. The ...

When generating cutting-planes for mixed-integer programs from multiple rows of the simplex tableau, the usual approach has been to relax the integrality of the non-basic variables, compute an intersection cut, then strengthen the cut coefficients corresponding to integral non-basic variables using the so-called trivial lifting procedure. Although of polynomialtime complexity in theory, this li...

3,4-dihydroxy-phenyl lactic acid (DLA) and salvianolic acid B (SAB) are two major water-soluble components of Salvia miltiorrhiza (SM). Previous works have revealed the ability of DLA and SAB to scavenge oxygen free radicals, inhibiting the expression of adhesion molecules CD11b/CD18 in neutrophil. Cardiotonic pills (CP), which is a traditional Chinese medicine compound preparation containing D...

We use deep HST STIS and NICMOS images of three spectroscopically confirmed galaxy counterparts of high-redshift damped Lyα (DLA) absorbers (one of which is a new discovery) to test the hypothesis that high-redshift DLA galaxies are Lyman-break galaxies. If this hypothesis is correct the emission properties of DLA galaxies must lie within the range of emission properties measured for Lyman-brea...