Location-areas is a popular location management scheme in cellular networks. In the location areas scheme, a service area is partitioned into location areas, each consisting of contiguous cells. A mobile terminal updates its location whenever it moves into a cell that belongs to a new location area. However, no matter how the location areas are designed, the ping-pong location update effect exi...

The E. coli protein WrbA is an FMN-dependent NAD(P)H:quinone oxidoreductase that has been implicated in oxidative defense. Three subunits of the tetrameric enzyme contribute to each of four identical, cavernous active sites that appear to accommodate NAD(P)H or various quinones, but not simultaneously, suggesting an obligate tetramer with a ping-pong mechanism in which NAD departs before oxidiz...

We present the PONG method to compute selectional preferences using part-of-speech (POS) N-grams. From a corpus labeled with grammatical dependencies, PONG learns the distribution of word relations for each POS N-gram. From the much larger but unlabeled Google N-grams corpus, PONG learns the distribution of POS N-grams for a given pair of words. We derive the probability that one word has a giv...

Table 7. This table contains statistics regarding applying locality optimization to the TSP application running on 6 hosts with false sharing for different k (number of jobs contending for a page). Applying locality optimizations decreases dramatically the number of DSM messages (page lookup and transfer). The added overhead imposed by ping-pong treatment mechanism and increased number of threa...

Enzymatic synthesis of palm oil esters (POE) was carried out via alcoholysis of palm oil (PO) and oleyl alcohol (OA) catalyzed by Lipozyme TL IM. The optimum reaction conditions were: temperature: 60 °C; enzyme load: 24.7 wt%; substrate ratio: 1:3 (PO/OA), impeller speed: 275 rpm and reaction time: 3 h. At the optimum condition, the conversion of POE was 79.54%. Reusability study showed that Li...

Density functional theory (DFT) was utilized to investigate the hydrolysis reaction mechanisms of phosphodiester BNPP (BNPP = bis(4-nitrophenyl)phosphate) catalyzed by a symmetrical oxyimine-based macrocyclic dinuclear zinc(ii) complex. We examined the nature of the nucleophilic reagent and the active form of the catalyst. The coordination and binding models of the catalyst-substrate complex we...