Science and Engineering Papers
This collection houses research from the Faculty of Science and Engineering at the University of Waikato.
All items in Research Commons are provided only to permit fair dealing for the purposes of research or private study. They are protected by copyright with all rights reserved unless otherwise indicated.
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Investigating subantarctic ¹⁴C ages of different peat components: site and sample selection for developing robust age models in dynamic landscapes
(University of Arizona, 2019)Precise radiocarbon (¹⁴C) dating of sedimentary sequences is important for developing robust chronologies of environmental change, but sampling of suitable components can be challenging in highly dynamic landscapes. Here ... -
Groundwater-surface water interaction - A Lake-Modeller's conceptual view
(GNS Science, 2016)This article explores the groundwater-surface water interaction from a conceptual point of view. -
Moiapu 3: Settlement on Moiapu Hill at the very end of Lapita, Caution Bay hinterland
(ANU Press, 2019)The Caution Bay archaeological project on the south coast of mainland Papua New Guinea has excavated 122 sites over a 9 km² area. Lapita ceramics appear at a number of sites at c. 2900 cal. BP. Here we present the results ... -
Perched and leaky layers in complex surface-subsurface flow environments: the Kawerau shallow groundwater aquifer (New Zealand)
(New Zealand Hydrological Society, 2017)Perched and leaky geological layers can play an important role in hydrological systems by redirecting land surface recharge and reducing total recharge volume to regional aquifers. The extent of continuity and permeability ... -
Relating bridge analysis for heat exchanger network retrofit identification to retrofit design
(AIDIC Servizi S.r.l., 2018)The aim of the paper is to improve a recently developed automated HEN retrofit targeting method by linking the shapes of the Exchanger Shifted Composite Curve (ESCC) and Exchanger Grand Composite Curve (EGCC) to the required ... -
Optimising energy recovery in hydrothermal liquefaction of radiata pine and Kraft mill black liquor
(2018)The aim of this paper is to develop a heat exchanger network for hydrothermal liquefaction that is co-located with an existing Kraft pulp mill. Hydrothermal Liquefaction (HTL) is an energy-intensive process that operates ... -
Quaternary research in New Zealand and relationship to the International Union for Quaternary Research (INQUA)
(School of Science, University of Waikato, 2019)Many of the top Quaternary science specialists globally are members of the International Union for Quaternary Research (INQUA), and a number of New Zealand Quaternary scientists are in that category. Membership of INQUA ... -
Responses of the fish community and biomass in Lake Ohinewai to fish removal and the koi carp exclusion barrier
(Waikato Regional Council, 2017)The objectives of this research were to determine the biomass of koi carp (Cyprinus carpio) and other fish species in Lake Ohinewai in 2016 by two-sample mark-recapture methods and to compare these estimates with similar ... -
Heat treatment, impact properties, and fracture behaviour of Ti-6Al-4V alloy produced by powder compact extrusion.
(MDPI, 2019)The mechanical properties of titanium and titanium alloys are very sensitive to processing, microstructure, and impurity levels. In this paper, a blended powder mixture of Ti-6Al-4V alloy was consolidated by powder compact ... -
Tracking jockeys in a cluttered environment with group dynamics
(ACM Press, 2019)This project aims to detect and track jockeys at the turning point of the horse races. The detection and tracking of the objects is a very challenging task in a crowded environment such as horse racing due to occlusion. ... -
Accounting for stream variability in retrofit problems using Monte Carlo simulation
(2018)The aim of this paper is to use Monte Carlo simulation to analyse the effect of stream data variation on the economic performance of retrofit designs. The input stream data is fitted to a distribution which can be sampled ... -
Compressor shaft work targeting using new numerical exergy problem table algorithm (Ex-PTA) in sub-ambient processes
(AIDIC Servizi S.r.l., 2018)One of the major challenges faced by energy intensive industries is an excessive greenhouse gas emission to the atmosphere due to high consumption of fossil fuels throughout the production processes. Due to high electricity ... -
Thermal diffusivity and thermal conductivity of dispersed glass sphere composites over a range of volume fractions
(Springer, 2018)Glass spheres are often used as filler materials for composites. Comparatively few articles in the literature have been devoted to the measurement or modelling of thermal properties of composites containing glass spheres, ... -
Evaluation of a stratified tank based heat recovery loop via dynamic simulation
(2018)Prerequisite for hot water recovery in the dairy and beverage industry is the use of heat storage, such as stratified tanks. Total Site Heat Integration enables the targeting of heat recovery potential, the concrete ... -
The cold chain in New Zealand - A review
(Elsevier, 2018)Approximately 45 % of all exports from New Zealand are food products or by-products, and an estimated 60 % of these are exported in the refrigerated state. The leading food sectors in terms of volume and income are in ... -
Thermal conductivity measurement and prediction of particulate foods
(Taylor & Francis, 2015)There is reason to question some of the published thermal conductivity data for particulate foods. It is argued in this paper, based on thermal conductivity bounds analysis, that the thermal conductivity of particulate ... -
Networks for utilising the organic and dry fractions of municipal waste: P-graph approach
(AIDIC Servizi S.r.l., 2017)Minimising the demand for fossil fuels and the greenhouse gas footprints is of high priority for sustainable development. This is true for all societal aspects - including research and development. Waste-to-Energy (WtE) ... -
Effective thermal conductivity prediction of foods using composition and temperature data
(Elsevier, 2016)Thermal conductivity data are important for food process modelling and design. Where reliable thermal conductivity data are not available, they need to be predicted. The most accurate ‘first approximation’ methodology for ... -
Towards industrial Al-Nb-B master alloys for grain refining Al-Si alloys
(2019)It has long been known that foundry Al-Si alloys cannot reliably and consistently be grain refined by means of Ti-containing master alloys due to reaction between Ti and Si. Over the last years we developed and studied new ... -
Total site utility system structural design using P-graph
(2018)This paper explores the macro optimisation decisions of energy sources selection and the structural design of the utility system within the framework of Total Site Heat Integration (TSHI). Most TSHI research on utility ...
