28024409
The Concept of Memory-Based Thread Execution by Highly Functional Memory Controller
43363560
Adaptive Dynamic Voltage Scaling for Real-Time Systems
46574197
On Natural Joins in Object-Oriented Databases
In this paper, we introduce a recursively-defined natural join operation for composing complex objects. The notable features of our natural join are (1) Operand types are generalized into atomic-type, set-type, and tuple-type objects, and (2) The elements of set-type objects are allowed to be heterogenous. Then, we discuss how to realize the natural join by the message passing computing mechanism. Finally, we investigate some mathematical properties about the natural join. Especially, we provide a condition under which the sub-object relationship defined by Bancilhon and Khoshafian is preserved under our natural join and investigate the relationship between their intersection and our natural join.
35660731
Some Properties of Fuzzy Sets of Type 2
The concept of fuzzy sets of type 2 has been defined by L. A. Zadeh as an extension of ordinary fuzzy sets. The fuzzy set of type 2 can be characterized by a fuzzy membership function the grade (or fuzzy grade) of which is a fuzzy set in the unit interval [0, 1] rather than a point in [0, 1]. This paper investigates the algebraic structures of fuzzy grades under the operations of join ⊔, meet ⊔, and negation ┐ which are defined by using the extension principle, and shows that convex fuzzy grades form a commutative semiring and normal convex fuzzy grades form a distributive lattice under ⊔ and ⊓. Moreover, the algebraic properties of fuzzy grades under the operations and which are slightly different from ⊔ and ⊓, respectively, are briefly discussed.
36124114
Schema virtualization in object-oriented databases
A description is given of the concept and implementation techniques of schema virtualization in object-oriented databases. The objective of schema virtualization is to provide users with multiple views of a database. First, the notions of virtual classes and virtual schemata, which are natural extension of views in relational databases, is introduced. Then, procedures to convert a schema into a virtual one, as well as rules schemata and their conversion should satisfy, are discussed. The key issue of the design of virtual classes and virtual schemata is 'regarding procedures as objects'. Closure properties of classes and schemata are also discussed. Finally, several implementation techniques for realizing schema virtualization in Smalltalk-80 are presented.<<ETX>>
5408151
Alternative Objects in Object-oriented Databases
26205197
Behavior Analysis of Object-Oriented Databases: Method Structure, Execution Trees, and Reachability (Extended Abstract)
A theoretical model for analyzing the behavior of method execution in object-oriented databases (OODBs) is introduced and used to study issues of reachability, nontermination, and well-typedness in the context of restricted classes of OODBs.