UC Research Repository
Nau mai, haere mai, welcome to the UC Research Repository
The UC Research Repository collects, stores and makes available original research from postgraduate students, researchers and academics based at the University of Canterbury.
Communities
Select a community to browse its collections.
- Items from Journals and Conferences hosted by the University of Canterbury
- University of Canterbury Research Centres
Recent Submissions
Guidelines for designing effective English language teaching materials
(2004) Howard , Jocelyn; Major, Jae
Brown marmorated stink bug overwintering aggregations are not regulated through vibrational signals during autumn dispersal
(The Royal Society, 2020) Bedoya , Carol L.; Brockerhoff, Eckehard G.; Hayes , Michael; Leskey , Tracy C.; Morrison , William R.; Rice , Kevin B.; Nelson, Ximena
The brown marmorated stink bug, Halyomorpha halys (Heteroptera: Pentatomidae), is regarded as one of the world's most pernicious invasive pest species, as it feeds on a wide range of economically important crops. During the autumn dispersal period, H. halys ultimately moves to potential overwintering sites, such as human-made structures or trees where it will alight and seek out a final overwintering location, often aggregating with other adults. The cues used during this process are unknown, but may involve vibrational signals. We evaluated whether vibrational signals regulate cluster aggregation in H. halys in overwintering site selection. We collected acoustic data for six weeks during the autumn dispersal period and used it to quantify movement and detect vibrational communication of individuals colonizing overwintering shelters. Both movement and vibrational signal production increased after the second week, reaching their maxima in week four, before decaying again. We found that only males produced vibrations in this context, yet there was no correlation between movement and vibrational signals, which was confirmed through playback experiments. The cues regulating the formation of aggregations remain largely unknown, but vibrations may indicate group size.
Sand aggradation in Caroline Bay, Timaru.
(1986) Fahy, F. M. (Felicity Mary)
This study deals with sand aggradation in Caroline Bay, Timaru. Sand accumulation in the bay, occurring at an average rate of 33,700 m³ y⁻¹, has generally been of a fortuitous nature since it is an unintended consequence of port development, but concern has arisen due to the extent of progradation and associated shoaling. Caroline Bay is a sandy pocket beach that has formed in the lee of habour structures at Timaru, on the otherwise continuous mixed sand and gravel beach complex of the Canterbury Bight. Analysis of historical data was made in order to define trends, rates and patterns of aggradation over the long term. This was combined with study of present day processes of aggradation and erosion, and of the wave and current mechanisms by which sand is transported into the bay. It was found that the beach is prograding at an average rate of 6.0 my⁻¹. Tides deliver sand to the entrance of the bay but they do not play a large part in the transport of sediment thereafter. Dashing Rocks and the North Mole both play an important role in redirecting waves into Caroline Bay. The analysis of sediments revealed that the sand is very well sorted. The beach is a lag deposit of coarser, less transportable gr ins. Finer sand tends to be trapped in the centre of the bay. The beach has a large envelope of change that is progressively moving seaward as well as upwards, so causing the bay to shallow. Short-term horizontal shoreline fluctuations can be up to 60 m per month. From the information provided by these approaches it proved possible to work forward and predict the shore line morphology, position and sedimentary nature of an equilibrium shoreline. A computer model was developed to predict the future shorelines. A likely position for an equilibrium shoreline was found to occur 70 m seaward of the present shoreline by about 2000 AD. Management problems, that are posed by aggradation and by wave action around the bay shores are discussed in the light of the major findings of the study.
Co-design: A process for change in the Aotearoa New Zealand education system
(2023) Lavender, Michelle
There have been numerous ‘tinkering around the edges’ attempts to improve educational outcomes for Māori, but real change will only occur when Māori are equal partners in all education decisions affecting their tamariki. This autoethnographic study analyses the effectiveness of co-design as a pathway for co-governance in Te Tātoru o Wairau, a Marlborough educational capital works project, involving iwi, the Ministry of Education, and other stakeholders. The case study critiques the project, measuring it against key indicators of Māori success: rangatiratanga (self-determination), cultural revitalisation and whānau (family) engagement. The article explores co-design’s effectiveness in achieving these goals. The most effective examples from Te Tātoru o Wairau occurred when power and resources were shared, with adequate time devoted to the co-design process alongside respect for iwi values. The findings suggest that without comprehensive sharing of power and resources, the quality of co-design is compromised, and the potential for rangatiratanga is unfulfilled. The study calls for a reinforced commitment to the principles of Te Tiriti o Waitangi across all educational levels, including school governance, to ensure successful initiatives.
A Single Phase Synchronous AC Motor
(2004) Strahan, Richard
The invention relates to single phase synchronous AC electric motors having a stator provided with a winding and a permanent magnet rotor. Permanent magnet reluctance torque is utilised to at least partially cancel the twice electrical frequency torque pulsation characteristic of such motors.