title: Municipal sewage sludge compost promotes Mangifera persiciforma tree growth with no risk of heavy metal contamination of soil

authors: Chu, Shuangshuang

abstract: Application of sewage sludge compost (SSC) as a fertilizer on landscaping provides a potential way for the effective disposal of sludge. However, the response of landscape trees to SSC application and the impacts of heavy metals from SSC on soil are poorly understood. We conducted a pot experiment to investigate the effects of SSC addition on Mangifera persiciforma growth and quantified its uptake of heavy metals from SSC by setting five treatments with mass ratios of SSC to lateritic soil as 0%:100% (CK), 15%:85% (S15), 30%:70% (S30), 60%:40% (S60), and 100%:0% (S100). As expected, the fertility and heavy metal concentrations (Cu, Zn, Pb and Cd) in substrate significantly increased with SSC addition. The best performance in terms of plant height, ground diameter, biomass and N, P, K uptake were found i n S30, implying a reasonable amount of SSC could benefit the growth of M. persiciforma. The concentrations of Cu, Pb and Cd in S30 were insignificantly different from CK after harvest, indicating that M. persiciforma reduced the risk of heavy metal contamination of soil arising from SSC application. This study suggests that a reasonable rate of SSC addition can enhance M. persiciforma growth without causing the contamination of landscaping soil by heavy metals.

text: Municipal sewage sludge compost promotes Mangifera persiciforma tree growth with no risk of heavy metal contamination of soil Application of sewage sludge compost (SSC) as a fertilizer on landscaping provides a potential way for the effective disposal of sludge. However, the response of landscape trees to SSC application and the impacts of heavy metals from SSC on soil are poorly understood. We conducted a pot experiment to investigate the effects of SSC addition on Mangifera persiciforma growth and quantified its uptake of heavy metals from SSC by setting five treatments with mass ratios of SSC to lateritic soil as 0%:100% (CK), 15%:85% (S15), 30%:70% (S30), 60%:40% (S60), and 100%:0% (S100). As expected, the fertility and heavy metal concentrations (Cu, Zn, Pb and Cd) in substrate significantly increased with SSC addition. The best performance in terms of plant height, ground diameter, biomass and N, P, K uptake were found i n S30, implying a reasonable amount of SSC could benefit the growth of M. persiciforma. The concentrations of Cu, Pb and Cd in S30 were insignificantly different from CK after harvest, indicating that M. persiciforma reduced the risk of heavy metal contamination of soil arising from SSC application. This study suggests that a reasonable rate of SSC addition can enhance M. persiciforma growth without causing the contamination of landscaping soil by heavy metals.

year: 2017

title: Geomorphological mapping of ice-free areas using polarimetric RADARSAT-2 data on Fildes Peninsula and Ardley Island, Antarctica

authors: Schmid, T.

subjects: periglacial

abstract: Satellite-borne Synthetic Aperture Radar (SAR) has been used for characterizing and mapping in two relevant ice-free areas in the South Shetland Islands. The objective has been to identify and characterize land surface covers that mainly include periglacial and glacial landforms, using fully polarimetric SAR C band RADARSAT-2 data, on Fildes Peninsula that forms part of King George Island, and Ardley Island. Polarimetric parameters obtained from the SAR data, a selection of field based training and validation sites and a supervised classification approach, using the support vector machine were chosen to determine the spatial distribution of the different landforms. Eight periglacial and glacial landforms were characterized according to their scattering mechanisms using a set of 48 polarimetric parameters. The mapping of the most representative surface covers included colluvial deposits, stone fields and pavements, patterned ground, glacial till and rock outcrops, lakes and glacier ice. The overall accuracy of the results was estimated at 81%, a significant value when mapping areas that are within isolated regions where access is limited. Periglacial surface covers such as stone fields and pavements occupy 25% and patterned ground over 20% of the ice-free areas. These are results that form the basis for an extensive monitoring of the ice-free areas throughout the northern Antarctic Peninsula region.

text: Geomorphological mapping of ice-free areas using polarimetric RADARSAT-2 data on Fildes Peninsula and Ardley Island, Antarctica Satellite-borne Synthetic Aperture Radar (SAR) has been used for characterizing and mapping in two relevant ice-free areas in the South Shetland Islands. The objective has been to identify and characterize land surface covers that mainly include periglacial and glacial landforms, using fully polarimetric SAR C band RADARSAT-2 data, on Fildes Peninsula that forms part of King George Island, and Ardley Island. Polarimetric parameters obtained from the SAR data, a selection of field based training and validation sites and a supervised classification approach, using the support vector machine were chosen to determine the spatial distribution of the different landforms. Eight periglacial and glacial landforms were characterized according to their scattering mechanisms using a set of 48 polarimetric parameters. The mapping of the most representative surface covers included colluvial deposits, stone fields and pavements, patterned ground, glacial till and rock outcrops, lakes and glacier ice. The overall accuracy of the results was estimated at 81%, a significant value when mapping areas that are within isolated regions where access is limited. Periglacial surface covers such as stone fields and pavements occupy 25% and patterned ground over 20% of the ice-free areas. These are results that form the basis for an extensive monitoring of the ice-free areas throughout the northern Antarctic Peninsula region.

year: 2016

title: Decolonising legal research: Developing legal theory to articulate Māori and non-Māori legal research paradigms equitably

authors: Hasan-Stein, Linda

abstract: Māori and non-Māori legal research paradigms in Aotearoa New Zealand are separated by a considerable theoretical knowledge gap. Māori knowledge systems are generally not well known in a non-Māori context. In order to bridge this theoretical knowledge gap jurisprudential studies need to address this gap from Māori and non-Māori perspectives. Doing so enables the development of decolonised legal research paradigms which allow for the sharing of knowledge from positions of respect. In this work, a new theoretical interpretation of legal research paradigms in our jurisprudence is presented, relying on an interdisciplinary approach to support these interpretive strategies. 

Beginning with the understanding that knowledge is empowering for both Māori and non-Māori, I foreground the epistemological character of decolonising legal research that supports Linda Tuhiwai Smith’s call for research to be conceived differently and highlight the need for an integrated recognition of kaupapa Māori in the development of legal theory in Aotearoa New Zealand. Reimagining our laws as something more than ‘sovereignty’ is the first step in narrowing the current theoretical knowledge gap. I translate the broader language of colonialism into the more specific vocabulary of the criminal justice system, in order to make more visible the manner in which Eurocentrism permeates decolonising legal research and stifles the potential future social development of Māori. 

Since Linda Tuhiwai Smith’s call to decolonise research, significant progress has been made with regard to the inclusion of principles of tikanga Māori to guide legal research that includes Māori. However, transforming principles of tikanga Māori into our jurisprudential landscape is a complex task. It is increasingly recognised that understanding the key principles of tikanga Māori is not always sufficient and that a greater theoretical understanding of decolonising legal principles is needed. I will analyse theoretical features of research epistemologies with the goal of grasping the complex array of historically-specific practices through which particular dimensions of our socio-legal experience are produced. 

Finally, I will explore how an interdisciplinary approach enables us to link forms of subjectivity to forms of objectivity in a distinctively “cultural” way, by working through difference rather than against it, and by acknowledging as meaningful each law’s characteristic discursive formation. 

This work is written as an intervention in Eurocentrism, aimed at providing a fresh interpretation of decolonising legal research. On this level, the most important argumentative thread is the one that demonstrates how Eurocentrism can be read as a colonising tool, which deploys positions that marginalise Indigenous knowledge. By unpacking Eurocentrism’s complex meaning it is possible to refashion Eurocentrism to include the notions of “partnerships”, that value subjective experience over objective, and that, in reality, include “Indigenous cultural” qualities. 

This style of decolonising jurisprudence pushes strenuously for a legal paradigm shift towards a culturally safe space for all legal scholars, not just Māori; a shift that could encourage our legal theory to converge in a more holistic way. The most important argumentative threads are those centred on the inclusion of Indigenous arguments, and the emergent character of decolonising legal research categories such as whanaungatanga or relational accountability. This type of innovative legal interpretation offers the possibility for a new theoretical era for decolonising legal research.

text: Decolonising legal research: Developing legal theory to articulate Māori and non-Māori legal research paradigms equitably Māori and non-Māori legal research paradigms in Aotearoa New Zealand are separated by a considerable theoretical knowledge gap. Māori knowledge systems are generally not well known in a non-Māori context. In order to bridge this theoretical knowledge gap jurisprudential studies need to address this gap from Māori and non-Māori perspectives. Doing so enables the development of decolonised legal research paradigms which allow for the sharing of knowledge from positions of respect. In this work, a new theoretical interpretation of legal research paradigms in our jurisprudence is presented, relying on an interdisciplinary approach to support these interpretive strategies. 

Beginning with the understanding that knowledge is empowering for both Māori and non-Māori, I foreground the epistemological character of decolonising legal research that supports Linda Tuhiwai Smith’s call for research to be conceived differently and highlight the need for an integrated recognition of kaupapa Māori in the development of legal theory in Aotearoa New Zealand. Reimagining our laws as something more than ‘sovereignty’ is the first step in narrowing the current theoretical knowledge gap. I translate the broader language of colonialism into the more specific vocabulary of the criminal justice system, in order to make more visible the manner in which Eurocentrism permeates decolonising legal research and stifles the potential future social development of Māori. 

Since Linda Tuhiwai Smith’s call to decolonise research, significant progress has been made with regard to the inclusion of principles of tikanga Māori to guide legal research that includes Māori. However, transforming principles of tikanga Māori into our jurisprudential landscape is a complex task. It is increasingly recognised that understanding the key principles of tikanga Māori is not always sufficient and that a greater theoretical understanding of decolonising legal principles is needed. I will analyse theoretical features of research epistemologies with the goal of grasping the complex array of historically-specific practices through which particular dimensions of our socio-legal experience are produced. 

Finally, I will explore how an interdisciplinary approach enables us to link forms of subjectivity to forms of objectivity in a distinctively “cultural” way, by working through difference rather than against it, and by acknowledging as meaningful each law’s characteristic discursive formation. 

This work is written as an intervention in Eurocentrism, aimed at providing a fresh interpretation of decolonising legal research. On this level, the most important argumentative thread is the one that demonstrates how Eurocentrism can be read as a colonising tool, which deploys positions that marginalise Indigenous knowledge. By unpacking Eurocentrism’s complex meaning it is possible to refashion Eurocentrism to include the notions of “partnerships”, that value subjective experience over objective, and that, in reality, include “Indigenous cultural” qualities. 

This style of decolonising jurisprudence pushes strenuously for a legal paradigm shift towards a culturally safe space for all legal scholars, not just Māori; a shift that could encourage our legal theory to converge in a more holistic way. The most important argumentative threads are those centred on the inclusion of Indigenous arguments, and the emergent character of decolonising legal research categories such as whanaungatanga or relational accountability. This type of innovative legal interpretation offers the possibility for a new theoretical era for decolonising legal research.

year: 2026