Browsing Engineering: Journal Articles by Title
Now showing items 120 of 904

11interval PFG pulse sequence for improved measurement of fast velocities of fluids with high diffusivity in systems with short T2*
(University of Canterbury. Chemical and Process Engineering, 2016)Magnetic resonance (MR) was used to measure SF6 gas velocities in beds filled with particles of 1.1 mm and 0.5 mm in diameter. Four pulse sequences were tested: a traditional spin echo pulse sequence, the 9interval and ... 
1D and 3D models of cerebrovascular flow
(University of Canterbury. Mechanical Engineering., 2005)The Circle of Willis is a ringlike structure of blood vessels found beneath the hypothalamus at the base of the brain. Its main function is to distribute oxygenrich arterial blood to the cerebral mass. Onedimensional ... 
The 2015 Gorkha Nepal Earthquake: insights from earthquake damage survey
(University of Canterbury. Civil and Natural Resources Engineering, 2015)The 2015 Gorkha Nepal earthquake caused tremendous damage and loss. To gain valuable lessons from this tragic event, an earthquake damage investigation team was dispatched to Nepal from 1 May 2015 to 7 May 2015. A unique ... 
A 3approximation algorithm for the subtree distance between phylogenies
(University of Canterbury. Mathematics and Statistics., 2008)In this paper, we give a (polynomialtime) 3approximation algorithm for the rooted subtree prune and regraft distance between two phylogenetic trees. This problem is known to be NPcomplete and the best previously known ... 
3D models of blood flow in the cerebral vasculature
(University of Canterbury. Mechanical Engineering., 2006)The circle of Willis (CoW) is a ringlike arterial structure located in the base of the brain and is responsible for the distribution of oxygenated blood throughout the cerebral mass. To investigate the effects of the ... 
3D Printed Porous Media Columns with Fine Control of Column Packing Geometry
(University of Canterbury. Chemical and Process EngineeringUniversity of Canterbury. College Office (Engineering)University of Canterbury. Biomolecular Interaction Centre, 2014)In this paper we demonstrate, for the first time, the use of 3D printing (also known as additive manufacturing or rapid prototyping) to create porous media with precisely defined packing morphologies, directly from computer ... 
3D Printed Stirling Engines for Education of Machine Design and Analysis
(University of Canterbury. Mechanical Engineering, 2016)The recent proliferation of low to medium cost additive manufacturing equipment opens a doorway to using the technology for aiding the education of many engineering principles. Stirling cycle engines are highly complex ... 
Accumulation and fate of contaminants (Zn, Pb, Fe and S) in substrates of wetlands constructed for treating mine wastewater
(University of Canterbury. Civil Engineering., 2004)Substrates of treatment wetlands, which were constructed at an operational leadzinc mining facility (Tara Mines) in Ireland, were analysed over a 5year period for metal content. Lead, zinc, iron and sulphate were removed ... 
Accuracy of approximate methods of uncertainty propagation in seismic loss estimation
(University of Canterbury. Civil and Natural Resources EngineeringUniversity of Canterbury. Mathematics and Statistics, 2010)In this paper the efficacy of an approximate method of uncertainty propagation, known as the firstorder secondmoment (FOSM) method, for use in seismic loss estimation is investigated. The governing probabilistic equations ... 
Active insulin infusion using optimal and derivative weighted control
(University of Canterbury. Mathematics and Statistics.University of Canterbury. Mechanical Engineering., 2002)Close control of blood glucose levels significantly reduces vascular complications in Type I diabetes. A control method for the automation of insulin infusion that utilizes emerging technologies in blood glucose biosensors ... 
Adaptive bolusbased targeted glucose regulation of hyperglycaemia in critical care
(University of Canterbury. Mechanical Engineering., 2005)Critically ill patients are often hyperglycemic and extremely diverse in their dynamics. Consequently, fixed protocols and sliding scales can result in error and poor control. A twocompartment glucoseinsulin system ... 
An adaptive continuum/discrete crack approach for meshfree particle methods
(University of Canterbury. Mechanical Engineering., 2003)A coupled continuum/discrete crack model for strain softening materials is implemented in a meshfree particle code. A coupled damage plasticity constitutive law is applied until a certain strain based threshold value  ... 
Adaptive survey designs for sampling rare and clustered populations
(University of Canterbury. Mathematics and Statistics, 2013)Designing an efficient largearea survey is a challenge, especially in environmental science when many populations are rare and clustered. Adaptive and unequal probability sampling designs are appealing when populations ... 
After the quake
(University of Canterbury. Civil and Natural Resources Engineering, 2012)The 1995 book, “Wellington after the quake: the challenge of rebuilding cities”, is reviewed in light of the 2010/2011 Canterbury, New Zealand, earthquakes. Lessons are drawn related to the difficulties of recovery of ... 
An algorithm for constructing a ktree for a kconnected matroid
(University of Canterbury. Mathematics and Statistics, 2015)For a kconnected matroid M, Clark and Whittle showed there is a tree that displays, up to a natural equivalence, all nontrivial kseparations of M. In this paper, we present an algorithm for con structing such a tree, ... 
Algorithmic Aspects of tree amalgamation
(University of Canterbury. Mathematics and Statistics., 2000)The amalgamation of leaflabelled trees into a single (super)tree that "displays" each of the input trees is an important problem in classification. We discuss various approaches to this problem and show that a simple ... 
Algorithmic Processing of Pressure Waveforms to Facilitate Estimation of Cardiac Elastance
(University of Canterbury. Electrical and Computer EngineeringUniversity of Canterbury. Mechanical Engineering, 2012)Background: Cardiac elastances are highly invasive to measure directly, but are clinically useful due to the amount of information embedded in them. Information about the cardiac elastance, which can be used to estimate ... 
Anabelian geometry and descent obstructions on moduli spaces
(MATHEMATICAL SCIENCE PUBL, 2016)We study the section conjecture of anabelian geometry and the sufficiency of the finite descent obstruction to the Hasse principle for the moduli spaces of principally polarized abelian varieties and of curves over number ... 
Analysing the effects of cold, normal, and warm digits on transmittance pulse oximetry
(University of Canterbury. Mechanical Engineering, 2016)Noninvasive estimation of arterial oxygen saturation (SpO2) and heart rate using pulse oximeters is widely used in hospitals. Pulse oximeters rely on photoplethysmographic (PPG) signals from a peripherally placed optical ... 
Analysis and design of classB dual fed distributed power amplifiers
(University of Canterbury. Electrical and Computer Engineering, 2004)The analysis of, and derivation of design equations for, a classB balanced singleended dualfed distributed amplifier is presented. This approach allows efficient combining of FET output power without multiway power ...