The DWS (Data Warehouse Striping) technique is a data partitioning approach especially designed for distributed data warehousing environments. In DWS the fact tables are distributed by an arbitrary number of low-cost computers and the queries are executed in parallel by all the computers, guarantying a nearly optimal speed up and scale up. Data loading in data warehouses is typically a heavy pr...

We give a new algorithm to construct optimal alphabetic ternary trees, where every internal node has at most three children. This algorithm generalizes the classic Hu-Tucker algorithm, though the overall computational complexity has yet to be determined.

We describe a modiication of the Hu{Tucker algorithm for constructing an optimal alphabetic tree that runs in O(n) time for several classes of inputs. These classes can be described in simple terms and can be detected in linear time. We also give simple conditions and a linear algorithm for determining, in some cases, if two adjacent nodes will be combined in the optimal alphabetic tree.

Previous studies have shown that children learning alphabetic writing systems who have language impairment or dyslexia exhibit speech perception deficits. However, whether such deficits exist in children learning logographic writing systems who have poor reading comprehension remains uncertain. To further explore this issue, the present study examined speech perception deficits in Mandarin-spea...

Word and pseudoword reading are related abilities that are fundamental to reading development in alphabetic orthographies. They are respectively assumed to index children’s orthographic representations of words as acquired through the underlying ‘self-teaching mechanism’ of alphabetic pseudoword decoding. However, little is known about the concurrent growth trajectories of these skills in the e...

Modern management knowledge relies overwhelmingly on the written word and it’s disseminated through print. Writing in general and alphabetic writing in particular facilitated the development of abstract thinking and the linear logic necessary for the systematic framing of individual activities into purposeful functions. In so doing it precipitated the necessary future goal-orientation required ...

The present study examined word learning difficulties in Chinese dyslexic children, readers of a nonalphabetic script. A total of 105 Hong Kong Chinese children were recruited and divided into three groups: Dyslexic (mean age 8;8), CA control (mean age 8;9), and RL control (mean age 6; 11). They were given a word learning task and a familiar word writing task. It was found that the Dyslexic gro...

There has been less research on how children learn to spell than on how they learn to read, but a good deal is now known about spelling development. This article reviews studies of normative development, beginning with children’s early scribbles and proceeding to prephonological spelling involving letters, phonologically influenced invented spelling, and more advanced spelling. Most of the stud...