title: Lake-size dependency of wind shear and convection as controls on gas exchange

authors: Read, Jordan S.

subjects: gas exchange

abstract: High-frequency physical observations from 40 temperate lakes were used to examine the relative contributions of wind shear (u∗) and convection (w∗) to turbulence in the surface mixed layer. Seasonal patterns of u∗ and w∗ were dissimilar; u∗ was often highest in the spring, while w∗ increased throughout the summer to a maximum in early fall. Convection was a larger mixed-layer turbulence source than wind shear (u∗/w∗ < 0.75) for 18 of the 40 lakes, including all 11 lakes <10 ha. As a consequence, the relative contribution of convection to the gas transfer velocity (k, estimated by the surface renewal model) was greater for small lakes. The average k was 0.54 m day⁻¹ for lakes <10 ha. Because u∗ and w∗ differ in temporal pattern and magnitude across lakes, both convection and wind shear should be considered in future formulations of lake-air gas exchange, especially for small lakes.

text: Lake-size dependency of wind shear and convection as controls on gas exchange High-frequency physical observations from 40 temperate lakes were used to examine the relative contributions of wind shear (u∗) and convection (w∗) to turbulence in the surface mixed layer. Seasonal patterns of u∗ and w∗ were dissimilar; u∗ was often highest in the spring, while w∗ increased throughout the summer to a maximum in early fall. Convection was a larger mixed-layer turbulence source than wind shear (u∗/w∗ < 0.75) for 18 of the 40 lakes, including all 11 lakes <10 ha. As a consequence, the relative contribution of convection to the gas transfer velocity (k, estimated by the surface renewal model) was greater for small lakes. The average k was 0.54 m day⁻¹ for lakes <10 ha. Because u∗ and w∗ differ in temporal pattern and magnitude across lakes, both convection and wind shear should be considered in future formulations of lake-air gas exchange, especially for small lakes.

year: 2012

title: Designing with biobased composites: understanding digital material perception through semiotic attributes

authors: Thundathil, Manu

subjects: Product Design

abstract: Biobased composites, which are considered a sustainable alternative to plastics, are yet to create a significant influence on product design and manufacturing. A key reason for this is perceptual handicaps associated with biobased composites and this study was aimed at understanding the mechanisms behind biocomposite perception, in the context of digital visuals. This study of digital biocomposite visuals demonstrated that material perception is influenced by the visual characteristics of the material. Data analysis of the perceptual attributes of the materials pointed towards clear ‘clustering’ of the materials against these attributes. Analysis shows that visual features like fibres and surface appearance may impact aesthetic and functional evaluation and there is no effect on age, gender or polymer type. We also propose a reference framework to categorise biobased composites based on visual order.

text: Designing with biobased composites: understanding digital material perception through semiotic attributes Biobased composites, which are considered a sustainable alternative to plastics, are yet to create a significant influence on product design and manufacturing. A key reason for this is perceptual handicaps associated with biobased composites and this study was aimed at understanding the mechanisms behind biocomposite perception, in the context of digital visuals. This study of digital biocomposite visuals demonstrated that material perception is influenced by the visual characteristics of the material. Data analysis of the perceptual attributes of the materials pointed towards clear ‘clustering’ of the materials against these attributes. Analysis shows that visual features like fibres and surface appearance may impact aesthetic and functional evaluation and there is no effect on age, gender or polymer type. We also propose a reference framework to categorise biobased composites based on visual order.

year: 2023-03-15

title: Redefining taonga: The Treaty Principles Bill and its potential impact on the status of te reo Māori

authors: Carter, Wayne Ngahuka

abstract: This thesis explores the potential impact of Aotearoa New Zealand’s proposed Treaty Principles Bill on the recognition and protection of te reo Māori (Māori language) as a taonga under the Treaty of Waitangi. This research examines the redefinition of fundamental Treaty principles as outlined in the bill, specifically addressing important questions concerning how the transition from partnership, protection and participation towards a focus in equal rights might influence both the legal standing and the cultural status of te reo Māori. With a quantitative methodology approach, this study draws from a range of sources, including legislative policies, political documents, historical records, and academic analysis, to evaluate the impacts and risks this bill could impose. A comparative analysis study with international examples of indigenous language protection provides broader insights into the potential effects on Māori language revitalisation efforts and te reo Māori and its status under the 2016 Māori Language Act. Early findings indicate that the Treaty Principles Bill has ignited considerable debate throughout Aotearoa New Zealand, emphasising tensions between traditional interpretations of the Treaty of Waitangi and framework proposed by the Act Party. Māori rights advocates and public debates express worries that the bill could diminish current protection and reduce advancements achieved for te reo Māori as a taonga. Critics argue that redefining these principles might fracture Māori-Crown relationships, possibly weakening differences and impacting New Zealand’s governance and national identity. This debate emphasises the challenging task of restoring New Zealand’s colonial past with its modern goals for fairness and equality. As Parliament reviews this legislation, it is confronted with a crucial decision that will influence the future direction of Aotearoa New Zealand.

text: Redefining taonga: The Treaty Principles Bill and its potential impact on the status of te reo Māori This thesis explores the potential impact of Aotearoa New Zealand’s proposed Treaty Principles Bill on the recognition and protection of te reo Māori (Māori language) as a taonga under the Treaty of Waitangi. This research examines the redefinition of fundamental Treaty principles as outlined in the bill, specifically addressing important questions concerning how the transition from partnership, protection and participation towards a focus in equal rights might influence both the legal standing and the cultural status of te reo Māori. With a quantitative methodology approach, this study draws from a range of sources, including legislative policies, political documents, historical records, and academic analysis, to evaluate the impacts and risks this bill could impose. A comparative analysis study with international examples of indigenous language protection provides broader insights into the potential effects on Māori language revitalisation efforts and te reo Māori and its status under the 2016 Māori Language Act. Early findings indicate that the Treaty Principles Bill has ignited considerable debate throughout Aotearoa New Zealand, emphasising tensions between traditional interpretations of the Treaty of Waitangi and framework proposed by the Act Party. Māori rights advocates and public debates express worries that the bill could diminish current protection and reduce advancements achieved for te reo Māori as a taonga. Critics argue that redefining these principles might fracture Māori-Crown relationships, possibly weakening differences and impacting New Zealand’s governance and national identity. This debate emphasises the challenging task of restoring New Zealand’s colonial past with its modern goals for fairness and equality. As Parliament reviews this legislation, it is confronted with a crucial decision that will influence the future direction of Aotearoa New Zealand.

year: 2025