Algebra: specifying how to obtain results. SQL: specifying real estate principles a value approach pdf how to derive.Tuple Relational Calculus TRC. Query specification involves giving a step by step process of obtaining the query.Comp 521 Files and Databases. tuple relational calculus pdf Comes in two flavors: Tuple relational calculus TRC and Domain relational calculus.y Comes in two flavours:...

In this paper an overview of a novel run time system for the management of tuple spaces, which utilises implicit information about tuple space use in Linda programs to maximise its performance. The approach is novel compared to other tuple space implementations because they either ignore the information, or expect the programmer to provide the information explicitly. A number of experimental re...

In this paper we describe the proof of an optimisation that can be applied to tuple space based run-time systems (as used in Linda). The optimisation allows, under certain circumstances, for a tuple that has been destructively removed from a shared tuple space (for example, by a Linda in) to be returned as the result for a non-destructive read (for example, a Linda rd) for a diierent process. T...

In this paper we describe the proof of an optimisation that can be applied to tuple space based run-time systems (as used in Linda). The optimisation allows, under certain circumstances, for a tuple that has been destructively removed from a shared tuple space (for example, by a Linda in) to be returned as the result for a non-destructive read (for example, a Linda rd) for a di erent process. T...

This paper describes a generalisation of the binary N tuple technique originally described by Bledsoe and Browning (1). The binary N tuple technique has commonly been used for the classification (2) and pre-processing (3) of binary images. The extension to the method described here allows grey level images of objects to be classified using the N tuple method without first having to convert the ...

Linda Gel85, CG89] is a coordination language providing generative communication via tuple spaces. Each tuple space is a global associative memory consisting of a bag (or multi-set) of tuples, where the tuples are variable-sized objects. Repeated insertions and removals of variable-sized tuples are liable to result in the memory containing several small areas of free memory to which larger, var...

A tuple (or n-tuple, for any integer n) is an interpretation of a list of n variables. It is thus a meta-function from a finite meta-set, to the universe. Tuples of a given kind (list of variables with their types) can be added to any theory as a new type of objects, whose variables are meant as abbreviations of packs of n variables (copies of the list with the same old types) x = (x0, · · · , ...

In this study, a multi-attribute group decision making (MAGDM) problem is investigated, in which decision makers provide their preferences over alternatives by using linguistic 2-tuple. In the process of decision making, we introduce the idea of a specific structure in the attribute set. We assume that attributes are partitioned into several classes and members of intra-partition are interrelat...

This paper investigates the use of n-tuple systems as position value functions for the game of Othello. The architecture is described, and then evaluated for use with temporal difference learning. Performance is compared with previously developed weighted piece counters and multi-layer perceptrons. The n-tuple system is able to defeat the best performing of these after just five hundred games o...

LiPS 1 is a system for distributed computing using idle-cycles in networks of workstations. In its version 2.3, it is currently used at the Universitt at des Saar-landes in Saarbr ucken, Germany to perform computationally intensive applications in the eld of cryptography and computer algebra on a net of approximately 250 workstations. It should be enhanced to work on more than 1000 machines all...