Inclusion of new types in relational database systems

... data types 2) the definition of new operators for these data types 3) the implementation of new access methods for data types 4) optimized query processing for commands containing new data types ... which include new data types and operators and ways to allow access methods to be used for new data types. 1. INTRODUCTION The collection of built -in data types in...

Ngày tải lên: 22/10/2013, 10:15

... components: Bac Linh Dam (North of Linh Dam), Linh Dam peninsula in the middle and Linh Dam expansion (South of Linh Dam). The success of the project has set the stage for a series of New Towns that ... typically found in the existing community. In addition, compact development of a New Town is a good option in preserving the green belt, and allowing full utilization of...

Ngày tải lên: 29/08/2013, 08:15

... factors (living and working environments in cities, home-town customs, working conditions and relating policies) were identified as the determinants affecting to jobs and daily life of female rural ... 100% labors selling goods in the streets and in- waiting labor market have to work in unsafe environments; their daily life are rather poor. 22.86% female freelane labors live in boa...

Ngày tải lên: 29/08/2013, 08:15

... perception of the system in terms of their ability to concen- trate on the instruction (Q3), in terms of their incli- nation to reuse the system (Q6) and in terms of the system’s matching of their ... steps in approaching this problem. Correct answers are also highlighted. We would like to reiterate that the goal of this study is to investigate if making certain types...

Ngày tải lên: 20/02/2014, 12:20

... need further work. This panel brings together a good sampling of the people involved in these tests including Indlv iduals intimately involved with the above systems. The position papers that ... even informal evaluations of systems conducted. Recently, this has begun to change. In the last several years, many of the current generation of natural language access to data...

Ngày tải lên: 08/03/2014, 18:20

... discuss related work in Section 5 and conclude in Sec- tion 6. 2. DATABASE COMPRESSION The nature of query processing in databases imposes sev- eral constraints in choosing a suitable database compression method. ... con- tains 61 attributes, out of which 26 are string-valued, consti- tuting 60% of the total database size. Surprisingly, there has not been much work in th...

Ngày tải lên: 30/03/2014, 13:20

... in one-on-one tutoring, its computational model- ing, and its application to the design of more effective Intelligent Tutoring Systems. A data collection of tutoring sessions in the domain of basic Computer ... 1990), such speed indicates a quick skimming of the text, whereas reading for learning typically has a lower speed, in the order of 200 words/minute. 5 Future work The...

Ngày tải lên: 31/03/2014, 00:20

Ngày tải lên: 01/04/2014, 11:21

... is behind B in the picture p, iff the z-coordinate of each point in p(A) is greater than the z- coordinate of each point in p(B). • p satisfies the relationship A inside B, stating that A is inside ... the relationship A left -of B, stating that A is to the left of B in the picture p, iff the x-coordinate of each point in p (A) is less than the x-coordinate of each point in...

Ngày tải lên: 07/03/2014, 14:20

... orientation in database systems, which is applied to characterize the engineering database systems investigated in the remainder of this section. 3.1 The (Pure) Relational Database Systems In the introduction ... Phrases: Engineering database systems, geometric modeling, object-oriented database systems INTRODUCTION Motivation The last few years have shown a...

Ngày tải lên: 07/03/2014, 23:20