today, saving and storing water are among the most critical and important issues which have attracted the world's attention. history of storing water in the form of ghanat and water reservoir by iranians goes back to ancient times. studies on this field show that benefiting from underground dams was one of the methods employed for exploiting water in past times. in countries like iran, due...

This paper reports a phenomenographic study of how introductory students view objects that have been created and stored by an object-oriented program. By analyzing student interviews, we identify five categories of description, each representing a different kind of understanding of the phenomenon. Of these categories, some represent viable understandings that we would like our students to have....

Traditionally, text is stored on computers as a stremn of characters. The goal of this research is to store text in a form that facilitates word manipulation whilst reducing storage space. A word list with syntactic linear ordering is stored and words in a text are given two-byte integer codes that point to their respective positions in this list. The implementation of the encoding scheme is de...

Active XML (AXML) documents combine extensional XML data with intentional data defined through Web service calls. The dynamic properties of these documents pose challenges to both storage and data materialization techniques. We present ARAXA, a non-intrusive approach to store AXML documents. It takes advantage of complex objects from object-relational DBMS to represent both extensional and inte...