Browsing Engineering: Reports by Issue Date
Now showing items 120 of 682

New Zealand pumice as a lightweight concrete aggregate
(University of Canterbury. Engineering, 1949)With the present day advance of building science, concrete engineers are beginning to look into the possibilities of making lightweight concrete particularly from lightweight aggregate. There are many reasons for this, the ... 
The general mechanism of evaporation and production of saturated brine by natural evaporation of sea water in large ponds
(University of Canterbury. Chemical Engineering, 1954)The principle of manufacturing salt from the sea is discussed. An examination of the literature indicates that the only relevant investigation which has been carried out is on the rate of evaporation from large bodies of ... 
Densification of coke
(University of Canterbury. Chemical Engineering, 1965)Further work has been carried out on the densification of Stockton coke to confirm Allan’s work (3), which showed that an acceptable density could be obtained by fine grinding and briquetting. The effect of particle size ... 
XIDENT : a computer technique for the direct indexing of electron diffraction spot patterns
(University of Canterbury, 1976)A rapid computer technique to index electron diffraction spot patterns from any crystal structure is described. The diffracting zone, which is represented to the computer by the measured diffracted distances of three ... 
A Comparison of Text Compression Methods
(University of Canterbury. Computer Science, 1976)Text compression is the activity of taking a file of text and subjecting it to a compaction process to reduce its storage requirements. Text compression is of interest because of the many applications involving the storing ... 
Permanent wave structures on an open two layer fluid
(University of Canterbury. Dept. of Mathematics, 1976)There is a significant nonlinear interaction between fast free surface waves and slow interface waves when the group velocity of the free surface waves is the same as the phase velocity of the interface waves. This ... 
Algebras for matrix limitation
(University of Canterbury. Dept. of Mathematics, 1977)Let A= (a m,n) be a regular matrix; by A is denoted the set of sequences limited by A and by A₀ those sequences limited to zero by A. If 𝜉 = { 𝜉n } is a bounded sequence and { 𝜉n sn } ∈ A₀ whenever {sn} ∈ A₀ ... 
Performance measurement and optimization of an implementation of stage2 in B6700 algol
(University of Canterbury, 1977)Program optimization is the process of changing the organization of a software systems so as to optimize resource utilization. When the program to be optimized is an application program rather than a systems program, the ... 
On the nonexistence of 5(24,12,6) and 4(23,11,6) designs
(University of Canterbury. Dept. of Mathematics, 1977)It is shown that 5(24,12,6) and 4(23,11,6) designs cannot exist and that consequently a nontrivial 2(2n+1,n,n1) design can be extended to a 4(2n+3,n+2,n1) design if and only if n=4. 
An Incident Reporting and Information Retrieval System for the Fire Service
(University of Canterbury. Computer Science, 1977)This year the students of COSC203 were involved with Dr R.E.M. Cooper and the Christchurch Fire Brigade in designing and implementing an online mobilising system for the Christchurch Fire Brigade. It was envisaged that ... 
Diverging typeD metrics
(University of Canterbury. Dept. of Mathematics, 1977)This paper contains an investigation of algebraically special spaces with two commuting Killing vectors. It is shown that the field equations for these spaces can be reduced to two ordinary differential equations, ... 
A Notation for Expressing Restricting Conditions on a ContextFree Grammar
(University of Canterbury. Computer Science, 1977)ContextFree grammars have several features which make them suitable for defining programming languages. For instance, such grammars are: “recursive, have relatively simple and well understood recognizers, and a readable ... 
The degree of monotone approximation
(University of Canterbury. Dept. of Mathematics, 1977)Jackson type theorems are obtained for generalized monotone approximation. Let En , k(f) be the degree of approximation of f by nth degree polynomials with kth derivative nonnegative on[~, \]. Then for each k ~ 2 there ... 
Permanent wave structures and resonant triads in a layered fluid
(University of Canterbury. Dept. of Mathematics, 1978)A closed three layer fluid with small density differences between the layers has two closely related modes of gravity wave propagation. The nonlinear interactions between the wave modes are investigated, particularly ... 
A tool for measuring the effectiveness of university computing services
(University of Canterbury, 1978)The primary aim of this project is to develop a general tool for use in such a comparative investigation. In this process, a pilot study carried out at the University of Canterbury tested hypotheses about user characteristics, ... 
A data abstraction model
(University of Canterbury, 1978)An abstract model, called the data abstraction model, is proposed, and the basic DATAM constructs and representations are presented. The use of DATAM in the modelling and representation of the enterprise view of data is ... 
Some 2(2n+1,n,n1) designs with multiple extensions
(University of Canterbury. Dept. of Mathematics, 1978)A 2(2n+1,n,λ) design can always be extended to a 3(2n+2,n+1,λ) design by complementation. If λ is large enough there may.be other methods of extension. By constructing nonselfcomplementary 3(18,9,7) designs ... 
Nonlinear wave groups in deep water
(University of Canterbury. Dept. of Mathematics, 1978)Nonlinear wave groups in deep water consist of wave modes for which nonlinear interactions and dispersion are in balance. The evolution equations for the wave modes are derived, and properties of nonlinear wave groups ... 
Acetylene by electric arc : a report on the feasibility of producing acetylene gas by a high intensity arc process
(University of Canterbury. Chemical Engineering, 1978)In examining the feasibility of acetylene production from coal by a high intensity arc process, many different aspects of the problem have been investigated. This report briefly notes the work done in different areas, and ... 
A Synthetic Measure of Response Time
(University of Canterbury. Computer Science, 1978)Measurement of computer systems performance has existed since the earliest days of computing, but the introduction of multiprogramming created the need for more comprehensive measurement of overall performance. The physical ...