title: An integrated site and device selection methodology for the ocean wave energy sector

authors: Bertram, Danielle Valerie

subjects: Renewable energy

abstract: The ocean covers approximately 70 % of the earth’s surface and contains an immense source of renewable energy, in terms of ocean waves. However, this resource is unevenly distributed throughout the world, and so, therefore, converting waves into a useful form of energy will require the identification of potential Wave Energy Farm (WEF) locations. This should be undertaken in tandem with selecting an appropriate Wave Energy Converter (WEC), as the characteristics of these devices are critical in capturing the available wave power. 
This thesis presents a novel integrated methodology to select and assess potential installation sites for WEFs, identify appropriate WECs, and overcome the limitations of current methods. Original contributions of this thesis include: (i) a robust method for identifying generic WEF sites based on the dimensions of sustainability, which includes a cultural dimension, and utilises limiting conditions to reduce large study areas; (ii) a suite of MATLAB tools—which thoroughly assesses potential WEF sites, in terms of the available resource as well as temporal, directional, and spectral characteristics; (iii) a WEC database which identifies all devices currently in development; and (iv) a WEC classification scheme that classifies devices in a practical and meaningful manner in order to streamline the selection process of WECs for wave energy projects.
Several of the developed methods have been applied to a New Zealand (NZ) case study. Results confirm that with the application of the proposed site selection method, that 12 suitable WEF sites, clustered within four regions along the west and south coast of NZ, were identified from the initial study area of approximately 4.1 million km². In terms of site assessment, the utilisation of the MATLAB tools established that a higher-energy area comprised the south of NZ and that as expected, the available resource at all sites was subjected to seasonal variability, with a maximum and minimum wave power available in the winter and summer months, respectively. Furthermore, it was determined that due to the westerly wind flow that dominates the wave generation and direction of wave propagation in NZ, that the prevailing wave approach direction at all the sites was between South-South-West and West-North-West. With regards to the spectral characteristics, it was further determined that a wide range of wave conditions were experienced at each site.
The development of the WEC database identified that 116 companies were actively developing 130 devices. These devices were then classified according to five main categories, which included a technology maturity class. Moreover, 41 devices were identified as being at an advanced technology level.

text: An integrated site and device selection methodology for the ocean wave energy sector The ocean covers approximately 70 % of the earth’s surface and contains an immense source of renewable energy, in terms of ocean waves. However, this resource is unevenly distributed throughout the world, and so, therefore, converting waves into a useful form of energy will require the identification of potential Wave Energy Farm (WEF) locations. This should be undertaken in tandem with selecting an appropriate Wave Energy Converter (WEC), as the characteristics of these devices are critical in capturing the available wave power. 
This thesis presents a novel integrated methodology to select and assess potential installation sites for WEFs, identify appropriate WECs, and overcome the limitations of current methods. Original contributions of this thesis include: (i) a robust method for identifying generic WEF sites based on the dimensions of sustainability, which includes a cultural dimension, and utilises limiting conditions to reduce large study areas; (ii) a suite of MATLAB tools—which thoroughly assesses potential WEF sites, in terms of the available resource as well as temporal, directional, and spectral characteristics; (iii) a WEC database which identifies all devices currently in development; and (iv) a WEC classification scheme that classifies devices in a practical and meaningful manner in order to streamline the selection process of WECs for wave energy projects.
Several of the developed methods have been applied to a New Zealand (NZ) case study. Results confirm that with the application of the proposed site selection method, that 12 suitable WEF sites, clustered within four regions along the west and south coast of NZ, were identified from the initial study area of approximately 4.1 million km². In terms of site assessment, the utilisation of the MATLAB tools established that a higher-energy area comprised the south of NZ and that as expected, the available resource at all sites was subjected to seasonal variability, with a maximum and minimum wave power available in the winter and summer months, respectively. Furthermore, it was determined that due to the westerly wind flow that dominates the wave generation and direction of wave propagation in NZ, that the prevailing wave approach direction at all the sites was between South-South-West and West-North-West. With regards to the spectral characteristics, it was further determined that a wide range of wave conditions were experienced at each site.
The development of the WEC database identified that 116 companies were actively developing 130 devices. These devices were then classified according to five main categories, which included a technology maturity class. Moreover, 41 devices were identified as being at an advanced technology level.

year: 2021

title: Adopting knowledge building pedagogy to support epistemic agency and collaborative contribution in science classes: A case study in New Zealand schools

authors: Taylor, Simon

abstract: This presentation draws on how secondary science teachers from three schools have helped to develop a knowledge building community with their junior classes

text: Adopting knowledge building pedagogy to support epistemic agency and collaborative contribution in science classes: A case study in New Zealand schools This presentation draws on how secondary science teachers from three schools have helped to develop a knowledge building community with their junior classes

year: 2019

title: Communicating towards justice in ‘The Subaltern Voice’ (TSV)

authors: Humphries, Maria

subjects: subaltern

abstract: We write with a voice of the marginalised in mind, as both marginalised women scholars writing from a critical perspective on human organisation and as privileged human beings with concern for those more dangerously excluded from The Master’s House. The voice we raise does not plead for assimilation into circumstances as they are. It calls for radical change. Our ideas originate in research with Māori women accountants employed in organisations expressing commitment to Māori involvement. From that research we learned that aspiring to bicultural ways of being in a context prematurely deemed post-colonial is fraught with risks of co-option and unintentional collusion. Accordingly we are committed to further exposing neo-colonialism and to experiment with The Subaltern Voice (TSV) as a heuristic for this work. Asking what might be said in TSV that is different from what can be said in more commonly heard voices calling for inclusion has brought us to new thoughts about our own engagement with ‘The Empire’. Not only as it continues to colonise Māori locally and indigenous peoples globally, but from the myriad of places we take our positions to speak, sometimes ‘from the margins’ and other times from within the relative comforts of The Master’s House.

text: Communicating towards justice in ‘The Subaltern Voice’ (TSV) We write with a voice of the marginalised in mind, as both marginalised women scholars writing from a critical perspective on human organisation and as privileged human beings with concern for those more dangerously excluded from The Master’s House. The voice we raise does not plead for assimilation into circumstances as they are. It calls for radical change. Our ideas originate in research with Māori women accountants employed in organisations expressing commitment to Māori involvement. From that research we learned that aspiring to bicultural ways of being in a context prematurely deemed post-colonial is fraught with risks of co-option and unintentional collusion. Accordingly we are committed to further exposing neo-colonialism and to experiment with The Subaltern Voice (TSV) as a heuristic for this work. Asking what might be said in TSV that is different from what can be said in more commonly heard voices calling for inclusion has brought us to new thoughts about our own engagement with ‘The Empire’. Not only as it continues to colonise Māori locally and indigenous peoples globally, but from the myriad of places we take our positions to speak, sometimes ‘from the margins’ and other times from within the relative comforts of The Master’s House.

year: 2009