Quaestiones Informaticae Vol 4 No 1https://hdl.handle.net/10500/241202024-03-29T10:39:36Z2024-03-29T10:39:36ZAn Alternative Development of the Vienna Data StructuresPhilips, N.C.K.https://hdl.handle.net/10500/241312018-06-06T12:15:50Z1986-01-01T00:00:00ZAn Alternative Development of the Vienna Data Structures
Philips, N.C.K.
This paper presents an axiomatic specification of a data type which is shown to be equivalent to the Vienna
data structures. The advantage of this alternative approach is its obvious simplicity.
1986-01-01T00:00:00ZResearch directions in information systemsMende, J.https://hdl.handle.net/10500/241302018-05-29T01:00:57Z1986-01-01T00:00:00ZResearch directions in information systems
Mende, J.
The success of a research project depends upon the inputs and outputs selected by the researcher, a poor choice
entailing useless results or wasted efforts.To avoid this one might consider the following alternatives:
t. Our present knowledge in the subject Information Systems largely consists of facts and engineering
techniques, scientific principles being few and inadequate. This imbalance suggests that research aimed at
extending the scientific foundations of the subject should yield more significant results than purely
technical research.
2. Structural and functional similarities between information, business and academic systems indicate the
existence of general laws that apply accross the interdisciplinary boundaries of the corresponding subject
areas. Accordingly it should be possible to tran~fer principles and techniques from Business and
Education to Information Systems and vice versa.
3. Economic History predicts that mankind is moving towards an Edensque state in which no one is obliged to
work for a living. The information systems necessary in that state therefore constitute highly significant
problems for re.,;earch.
1986-01-01T00:00:00ZModeller : a DSS for experimental study of Human-computer interactionFinnie, G.R.https://hdl.handle.net/10500/241292018-06-06T11:46:07Z1986-01-01T00:00:00ZModeller : a DSS for experimental study of Human-computer interaction
Finnie, G.R.
This paper describes the structure of a simple nonprocedural financial modelling system designed to collect a variety
of statistics on aspects of novice interaction with decision support systems. Some findings on the use of HELP
facilities by novices are discussed. Certain areas of difficulty experienced by novices are identified from an analysis
of compilation and logical errors.
1986-01-01T00:00:00ZThe SECD Machine : An IntroductionDempster, Roberthttps://hdl.handle.net/10500/241282018-05-29T01:00:55Z1986-01-01T00:00:00ZThe SECD Machine : An Introduction
Dempster, Robert
The S(tack), E(nvironment), C(ontrol) and D(ump) machine was invented by Landin (1964)
to perform the mechanical evaluation of symbolic expressions. The evaluation of an expression
invariably involves the application of an operator to an operand. The concept of an applicative
expression (AE) is thus formally introduced and discussed. This is followed by an overview of
the SECD machine and a detailed trace of the SECD machine state transformations during the
evaluation of an AE on the SECD machine.
1986-01-01T00:00:00Z