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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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 ... -
Use of simple thermal conductivity models to assess the reliability of measured thermal conductivity data
(Elsevier, 2017)Thermal conductivity data are important for modelling thermal processes and designing refrigeration systems. The literature contains a large number of data for food products, but many are questionable, whether due to ... -
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 ... -
Foreword: Crossing new frontiers
(2018)The local organising committee (LOC), together with members of the executive committee of the International Focus Group on Tephrochronology and Volcanism (INTAV), warmly welcome you to this international field conference ... -
Airborne microbial transport limitation to isolated Antarctic soil habitats
(Nature Publishing Group, 2019)Dispersal is a critical yet poorly understood factor underlying macroecological patterns in microbial communities1. Airborne microbial transport is assumed to occupy a central role in determining dispersal outcomes2,3, and ... -
Evidence of plant and animal communities at exposed and subglacial (cave) geothermal sites in Antarctica
(Springer, 2018)Geothermal areas, such as volcanoes, might have acted as glacial microrefugia for a wide range of species. The heavily glaciated but volcanically active Antarctic continent presents an ideal system for assessing this ... -
Gait analysis of pedestrians with the aim of detecting disabled people
(Trans Tech Publications, 2018)Gait classification is an effective and non-intrusive method for human identification and it has received significant attention in the recent years due to its applications in visual surveillance and monitoring systems. We ... -
Trophic state assessment of global inland waters using a MODIS-derived Forel-Ule index
(Elsevier, 2018)Eutrophication of inland waters is considered a serious global environmental problem. Satellite remote sensing (RS) has been established as an important source of information to determine the trophic state of inland waters ... -
Stromatolite records of environmental change in perennially ice-covered Lake Joyce, McMurdo Dry Valleys, Antarctica
(Springer, 2018)Calcite-rich columnar stromatolites grew in perennially ice-covered Lake Joyce in the McMurdo Dry Valleys, Antarctica, during a period of environmental change associated with rising lake level. Stromatolite calcite contains ...
