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Company formation in the Te Aroha mining district in the 1930s
(Historical Research Unit, University of Waikato, 2016) Hart, Philip
During the early years of the Depression, a few investors sought to form companies to rework almost every portion of the Te Aroha Mining District. Some flotations failed, and even when companies were formed very little work was done. A wide variety of people were promoters and investors, very few of whom had any mining knowledge or access to capital. Competition for ground and low commercial morality led to conflicts and exaggerated claims (notably that Te Aroha’s lodes were linked to Karangahake and Waihi). The Mines Department, anxious to prevent misinformation about these ventures being used to extract money from the gullible and also anxious to defend the industry from harm, was concerned about fraudulent assays and misleading reports from self-proclaimed ‘experts’. All these under-capitalized ventures quickly failed, for what little development took place quickly revealed the poverty of the ore. These syndicates and companies are dealt with chronologically.
Mining in the Te Aroha mining district during the depression years
(Historical Research Unit, University of Waikato, 2016) Hart, Philip
Because optimists believed there was payable gold still to be discovered in New Zealand, prospecting was seen as one way of soaking up the unemployed, and a subsidized scheme was established to assist those willing to try their luck. In the Te Aroha district, residents, despite their lack of geological knowledge, and supported by the local newspaper, held great hopes for a mining revival. In contrast, officials and the experts they consulted insisted that these hopes were in vain. After local businessmen and would-be prospectors exerted political pressure on the Minister of Mines, in whose electorate Te Aroha was situated, permission was granted to subsidize parties of amateur prospectors. Despite none of these parties finding anything worthwhile, the amateurs continued to claim to know more about the prospects than the experts. Some of the parties did little work, and as it was clear to officials that the subsidies were being wasted, these ceased, despite continued claims about potential discoveries. Some parties continued work, sometimes with private backing, prompting concerns about speculators trying to obtain ground. When a Labour Government came to power, it was no more willing than its predecessor to waste public money on fruitless prospecting. It was clear from the assays taken for both prospectors and experts that the value of the ore left by earlier miners was far too poor to permit a revival in mining, and on that note mining ceased at Waiorongomai
The role of thermal tolerance in biological invasion
(The University of Waikato, 2025) Wilde, Margot; McGaughran, Angela
Biological invasion and climate change are among the greatest threats to biodiversity currently. Several factors influence what makes a successful invasive species. Among these is the thermal tolerance of the invasive species. An organism’s thermal physiology underpins many aspects of its life, including the habitats in which it can survive, its reproduction and its development. Climate change is increasing global average temperatures at an unprecedented pace, which is increasing thermal stress on virtually all life around the world. These effects are particularly pronounced in ectotherms, which are reliant on environmental temperature to set their body temperature and drive their metabolism. Insects comprise a significant proportion of globally important invasive species. As well as being ectothermic, they have a complex life cycle with a number of developmental stages, all of which may be influenced by environmental temperatures. Invasive species can often tolerate or adapt to a broad range of environmental conditions. They may therefore be expected to have a broader thermal tolerance than their native counterparts, and than other invasives that have a narrower invaded range. This research used a blowfly model to investigate how thermal tolerance differed across temperatures, using a static temperature assay to measure thermal knockdown time. Key foci included the effects of both developmental heat acclimation and adult heat tolerance on thermal performance. In Chapter 2, variation in adult heat tolerance was assessed across three temperatures (41℃, 42℃, 43℃) in five blowfly species invasive to New Zealand. I found that the two more globally invasive species in the study exhibited higher heat tolerance than the three less invasive Calliphora species, whose native ranges are generally more temperate. In Chapter 3, the effect of developmental temperature on adult knockdown time in a single species (Calliphora stygia) was assessed. I showed that C. stygia reared at the lowest temperature (18℃) had the highest knockdown time and the smallest body size, while those reared at 26℃ 1 exhibited the shortest knockdown time and an intermediate body size, with those reared at 22℃ being the largest. Collectively, my results indicate that adult heat tolerance varies between invasive blowfly species, but that developmental acclimation temperature may not have a significant effect on adult heat tolerance. Given the increasing global temperatures seen with climate change, the effects of invasive species are likely to increase, with some species likely to do better than others in a warming world. Thermal performance will undoubtedly play a role in filtering out the ‘winners’ and ‘losers’, therefore further research into both heat and cold tolerance in both laboratory and field settings are crucial.
Emancipating critical thinking through aesthetics
(The University of Waikato, 2025) Yazici, Furkan; Kingsbury, Justine; Ulatowski, Joseph W.
This thesis examines how critical thinking can be enriched by incorporating imagination, emotions, and aesthetic sensibilities alongside logical reasoning. Traditional models of critical thinking have often excluded these dimensions, limiting their ability to address complex and dynamic contexts. Beginning with an analysis of critical thinking textbooks, the thesis identifies two central gaps: (1) the absence of any role for imagination in critical thinking and (2) a reductive and largely negative view of emotions. It then engages with alternative frameworks, such as Michael Gilbert’s multi-modal argumentation framework, which attempt to move beyond traditional approaches. I argue that although these are a step in the right direction, there is still work to be done to fill these gaps. Drawing on the distinction between propositional and non propositional representations, the thesis proposes a hybrid framework that integrates logical analysis with aesthetic experience. Through an investigation of aesthetic experience and its connection to emotions, imagination and critical thinking, the thesis shows how critical thinking can become a more comprehensive intellectual practice. The application of this enriched model to philosophical inquiry, with a particular focus on the concept of beauty as it applies to philosophy, provides an illustration of the application of the model. Finally, the thesis introduces improvisation as a synthesis of reason, emotion, and imagination. This provides a practical example of the integrated critical thinking approach developed throughout the work.
Integration of stereo vision system calibration and kinematic calibration for an autonomous kiwifruit harvesting system
(Springer Nature, 2022) Au, Chi Kit; Lim, Shen Hin; Duke, Mike; Kuang, Ye Chow; Redstall, Michael; Ting, Canaan
Stereo vision system and manipulator are two major components of an autonomous fruit harvesting system. In order to raise the fruit-harvesting rate, stereo vision system calibration and kinematic calibration are two significant processes to improve the positional accuracy of the system. This article reviews the mathematics of these two calibration processes and presents an integrated approach for acquiring calibration data and calibrating both components of an autonomous kiwifruit harvesting system. The calibrated harvesting system yields good positional accuracy in the laboratory tests, especially in harvesting individual kiwifruit. However, the performance is not in line with the outcomes in the orchard field tests due to the cluster growing style of kiwifruit. In the orchard test, the calibrations reduce the fruit drop rate but it does not impressively raise the fruit harvesting rate. Most of the fruit in the clusters remain in the canopy due to the invisibility of the stereo vision system. After analyzing the existing stereo vision system, a future visual sensing system research direction for an autonomous fruit harvesting system is justified.