title: An Evaluation of Document Keyphrase Sets

authors: Jones, Steve

subjects: computer science

abstract: Keywords and keyphrases have many useful roles as document surrogates and descriptors, but the manual production of keyphrase metadata for large digital library collections is at best expensive and time-consuming, and at worst logistically impossible. Algorithms for keyphrase extraction like Kea and Extractor produce a set of phrases that are associated with a document. Though these sets are often utilized as a group, keyphrase extraction is usually evaluated by measuring the quality of individual keyphrases. This paper reports an assessment that asks human assessors to rate entire sets of keyphrases produced by Kea, Extractor and document authors. The results provide further evidence that human assessors rate all three sources highly (with some caveats), but show that the relationship between the quality of the phrases in a set and the set as a whole is not always simple. Choosing the best individual phrases will not necessarily produce the best set; combinations of lesser phrases may result in better overall quality.

text: An Evaluation of Document Keyphrase Sets Keywords and keyphrases have many useful roles as document surrogates and descriptors, but the manual production of keyphrase metadata for large digital library collections is at best expensive and time-consuming, and at worst logistically impossible. Algorithms for keyphrase extraction like Kea and Extractor produce a set of phrases that are associated with a document. Though these sets are often utilized as a group, keyphrase extraction is usually evaluated by measuring the quality of individual keyphrases. This paper reports an assessment that asks human assessors to rate entire sets of keyphrases produced by Kea, Extractor and document authors. The results provide further evidence that human assessors rate all three sources highly (with some caveats), but show that the relationship between the quality of the phrases in a set and the set as a whole is not always simple. Choosing the best individual phrases will not necessarily produce the best set; combinations of lesser phrases may result in better overall quality.

year: 2003

title: The quantification of external colour changes during sexual transition in the protogynous spotty wrasse Notolabrus celidotus

authors: de Farias e Moraes, Carlos Eduardo

subjects: sex change

abstract: Hermaphroditism in fish has been well documented. Protogynous hermaphrodites (female to male sex change) are normally found in a polygamous social hierarchy. The male is the dominant within the group, followed by the largest female and it is common to observe aggressive behaviour as an exercise of dominance. Most of the studies relating to sex change used tropical species as models, however, little is known about temperate species. In this research, Notolabrus celidotus, a temperate protogynous wrasse, was used to investigate sex change. The overall goal was to develop an accurate methodology to assist with colour analysis of an external landmark. Ten males and ten females had pictures taken from the whole body. Digital photography and computational image analysis programs were used to help quantify the colour. Results were found through circular statistics, as hue is read as an angle. It was found that the anal fin presented the most significant mean variation of hue, within the body (female = 95.353 ± 3.16°; male = 141.138 ± 17.23°). The technique was then used to quantify the colour changes of the anal fin as individuals transitioned from female to male. Histological examination was also analysed and classified according to the transitional phase of every fish. The developed technique was able to track the colour changes and allocate them into distinct sexual transition stages. Statistical analysis showed that major colour changes began at the mid-transitional stage and progressed until the terminal phase male was achieved. The histological analysis of the gonads contributed to the study demonstrating internal changes through each sexual stage, additionally showing connection between the changes internally and externally. Through the development of a method to quantify external colour in relation to sexual state, this work creates opportunities for future studies. Investigations of sex change in this species can now be conducted without the need for invasive or destructive sampling to identify sex changing individuals. Further to this, individuals that are at different stages of sexual transition may be identified and selected for sampling by their external colour. Overall, this study was able to quantify and allocate external colour changes into distinct stages that map the restructure of the gonads during sex change.

text: The quantification of external colour changes during sexual transition in the protogynous spotty wrasse Notolabrus celidotus Hermaphroditism in fish has been well documented. Protogynous hermaphrodites (female to male sex change) are normally found in a polygamous social hierarchy. The male is the dominant within the group, followed by the largest female and it is common to observe aggressive behaviour as an exercise of dominance. Most of the studies relating to sex change used tropical species as models, however, little is known about temperate species. In this research, Notolabrus celidotus, a temperate protogynous wrasse, was used to investigate sex change. The overall goal was to develop an accurate methodology to assist with colour analysis of an external landmark. Ten males and ten females had pictures taken from the whole body. Digital photography and computational image analysis programs were used to help quantify the colour. Results were found through circular statistics, as hue is read as an angle. It was found that the anal fin presented the most significant mean variation of hue, within the body (female = 95.353 ± 3.16°; male = 141.138 ± 17.23°). The technique was then used to quantify the colour changes of the anal fin as individuals transitioned from female to male. Histological examination was also analysed and classified according to the transitional phase of every fish. The developed technique was able to track the colour changes and allocate them into distinct sexual transition stages. Statistical analysis showed that major colour changes began at the mid-transitional stage and progressed until the terminal phase male was achieved. The histological analysis of the gonads contributed to the study demonstrating internal changes through each sexual stage, additionally showing connection between the changes internally and externally. Through the development of a method to quantify external colour in relation to sexual state, this work creates opportunities for future studies. Investigations of sex change in this species can now be conducted without the need for invasive or destructive sampling to identify sex changing individuals. Further to this, individuals that are at different stages of sexual transition may be identified and selected for sampling by their external colour. Overall, this study was able to quantify and allocate external colour changes into distinct stages that map the restructure of the gonads during sex change.

year: 2019

title: Shifting tectonic plates of key discourses in New Zealand early childhood education policy (1989-2017):  A critical discourse analysis at the dawn of change

authors: Westbrook, Fiona

subjects: New Zealand

abstract: This thesis analysed the presence of neoliberalism, socialism and te Ao Māori in fundamental policy documents that frame New Zealand early childhood practice. It did so to critically engage with, and thus make sense of, neoliberalism’s application and potential growth in New Zealand early childhood policies from 1989 to 2017. The research additionally focused on the interplay of socialist and te Ao Māori discourses in these texts, in conjunction with neoliberalism. It employed a poststructuralist conceptual framework that utilised Kristeva’s intertextuality and Foucault’s discourse, governmentality, and power/knowledge. The philosophical framework facilitated an appreciation of the early childhood education (ECE) sector and government discourses, via policies that exhibited discursive power, truths, and knowledges. This thesis’ approach was employed through a critical discourse analysis, incorporating Kristeva’s intertextuality, Fairclough’s manifest intertextuality and interdiscursivity, as well as a keyword search. This form of document analysis was selected because it enabled me as the researcher to gain a deeper more developed understanding of the policy texts, eliciting meaning and recognition of the discourses often naturalised within them. 
 
Contrary to the dominant claims in ECE literature concerning contemporary discourse, the analysis did not discover the neoliberal discourse’s predominance within the selected policies and documents, as was expected. The neoliberal discourse did exist within government endorsed texts, such as the foreword of Te Whāriki (Ministry of Education, 2017b) and Four Year Plan 2016-2020 (Ministry of Education, 2016). However, when the texts came closest to the sector, such as Te Whāraki (Ministry of Education, 1996; 2017b) and the Licensing Criteria Early Childhood Education and Care (Ministry of Education, 2008), the discourses of socialism, te Ao Māori and neoliberalism, nullified, transformed and modified one another. These findings were exemplified in the updated Te Whāraki (Ministry of Education, 2017b), that limited the neoliberal use of individualism from the original, while also upgrading children’s future potential. ‘Future’ within this text, however, was constructed through a modification of te Ao Māori by absorbing and embodying it in incomplete ways.  
 
This thesis analysed the presence of neoliberalism, socialism and te Ao Māori in fundamental policy documents that frame New Zealand early childhood practice. It did so to critically engage with, and thus make sense of, neoliberalism’s application and potential growth in New Zealand early childhood policies from 1989 to 2017. The research additionally focused on the interplay of socialist and te Ao Māori discourses in these texts, in conjunction with neoliberalism. It employed a poststructuralist conceptual framework that utilised Kristeva’s intertextuality and Foucault’s discourse, governmentality, and power/knowledge. The philosophical framework facilitated an appreciation of the early childhood education (ECE) sector and government discourses, via policies that exhibited discursive power, truths, and knowledges. This thesis’ approach was employed through a critical discourse analysis, incorporating Kristeva’s intertextuality, Fairclough’s manifest intertextuality and interdiscursivity, as well as a keyword search. This form of document analysis was selected because it enabled me as the researcher to gain a deeper more developed understanding of the policy texts, eliciting meaning and recognition of the discourses often naturalised within them. 
 
Contrary to the dominant claims in ECE literature concerning contemporary discourse, the analysis did not discover the neoliberal discourse’s predominance within the selected policies and documents, as was expected. The neoliberal discourse did exist within government endorsed texts, such as the foreword of Te Whāriki (Ministry of Education, 2017b) and Four Year Plan 2016-2020 (Ministry of Education, 2016). However, when the texts came closest to the sector, such as Te Whāraki (Ministry of Education, 1996; 2017b) and the Licensing Criteria Early Childhood Education and Care (Ministry of Education, 2008), the discourses of socialism, te Ao Māori and neoliberalism, nullified, transformed and modified one another. These findings were exemplified in the updated Te Whāraki (Ministry of Education, 2017b), that limited the neoliberal use of individualism from the original, while also upgrading children’s future potential. ‘Future’ within this text, however, was constructed through a modification of te Ao Māori by absorbing and embodying it in incomplete ways.  
 
This thesis analysed the presence of neoliberalism, socialism and te Ao Māori in fundamental policy documents that frame New Zealand early childhood practice. It did so to critically engage with, and thus make sense of, neoliberalism’s application and potential growth in New Zealand early childhood policies from 1989 to 2017. The research additionally focused on the interplay of socialist and te Ao Māori discourses in these texts, in conjunction with neoliberalism. It employed a poststructuralist conceptual framework that utilised Kristeva’s intertextuality and Foucault’s discourse, governmentality, and power/knowledge. The philosophical framework facilitated an appreciation of the early childhood education (ECE) sector and government discourses, via policies that exhibited discursive power, truths, and knowledges. This thesis’ approach was employed through a critical discourse analysis, incorporating Kristeva’s intertextuality, Fairclough’s manifest intertextuality and interdiscursivity, as well as a keyword search. This form of document analysis was selected because it enabled me as the researcher to gain a deeper more developed understanding of the policy texts, eliciting meaning and recognition of the discourses often naturalised within them. 
 
Contrary to the dominant claims in ECE literature concerning contemporary discourse, the analysis did not discover the neoliberal discourse’s predominance within the selected policies and documents, as was expected. The neoliberal discourse did exist within government endorsed texts, such as the foreword of Te Whāriki (Ministry of Education, 2017b) and Four Year Plan 2016-2020 (Ministry of Education, 2016). However, when the texts came closest to the sector, such as Te Whāraki (Ministry of Education, 1996; 2017b) and the Licensing Criteria Early Childhood Education and Care (Ministry of Education, 2008), the discourses of socialism, te Ao Māori and neoliberalism, nullified, transformed and modified one another. These findings were exemplified in the updated Te Whāraki (Ministry of Education, 2017b), that limited the neoliberal use of individualism from the original, while also upgrading children’s future potential. ‘Future’ within this text, however, was constructed through a modification of te Ao Māori by absorbing and embodying it in incomplete ways.  
 
The findings of this thesis imply socialism, te Ao Māori and neoliberalism are constantly competing with one another in the analysed policies that construct New Zealand ECE discourses and, as a consequence, influence practice. This plurality has the potential to hinder one discourse from gaining domination over the others. Their joint consumption's and conflicts appear to periodically lessen and strengthen neoliberalism’s power/knowledges across eras, administrations, policies and paragraphs, as exemplified in the updated curriculum. These findings imply that the ‘drivers’ of power are pivotal, hindering and strengthening these discourses which are both complementary and competing. Additionally, the thesis establishes implications regarding the rich complexities of discourses, which can conceal themselves in other discourses, calling for deeper critical reflection if some power/knowledges are to be reduced.

text: Shifting tectonic plates of key discourses in New Zealand early childhood education policy (1989-2017):  A critical discourse analysis at the dawn of change This thesis analysed the presence of neoliberalism, socialism and te Ao Māori in fundamental policy documents that frame New Zealand early childhood practice. It did so to critically engage with, and thus make sense of, neoliberalism’s application and potential growth in New Zealand early childhood policies from 1989 to 2017. The research additionally focused on the interplay of socialist and te Ao Māori discourses in these texts, in conjunction with neoliberalism. It employed a poststructuralist conceptual framework that utilised Kristeva’s intertextuality and Foucault’s discourse, governmentality, and power/knowledge. The philosophical framework facilitated an appreciation of the early childhood education (ECE) sector and government discourses, via policies that exhibited discursive power, truths, and knowledges. This thesis’ approach was employed through a critical discourse analysis, incorporating Kristeva’s intertextuality, Fairclough’s manifest intertextuality and interdiscursivity, as well as a keyword search. This form of document analysis was selected because it enabled me as the researcher to gain a deeper more developed understanding of the policy texts, eliciting meaning and recognition of the discourses often naturalised within them. 
 
Contrary to the dominant claims in ECE literature concerning contemporary discourse, the analysis did not discover the neoliberal discourse’s predominance within the selected policies and documents, as was expected. The neoliberal discourse did exist within government endorsed texts, such as the foreword of Te Whāriki (Ministry of Education, 2017b) and Four Year Plan 2016-2020 (Ministry of Education, 2016). However, when the texts came closest to the sector, such as Te Whāraki (Ministry of Education, 1996; 2017b) and the Licensing Criteria Early Childhood Education and Care (Ministry of Education, 2008), the discourses of socialism, te Ao Māori and neoliberalism, nullified, transformed and modified one another. These findings were exemplified in the updated Te Whāraki (Ministry of Education, 2017b), that limited the neoliberal use of individualism from the original, while also upgrading children’s future potential. ‘Future’ within this text, however, was constructed through a modification of te Ao Māori by absorbing and embodying it in incomplete ways.  
 
This thesis analysed the presence of neoliberalism, socialism and te Ao Māori in fundamental policy documents that frame New Zealand early childhood practice. It did so to critically engage with, and thus make sense of, neoliberalism’s application and potential growth in New Zealand early childhood policies from 1989 to 2017. The research additionally focused on the interplay of socialist and te Ao Māori discourses in these texts, in conjunction with neoliberalism. It employed a poststructuralist conceptual framework that utilised Kristeva’s intertextuality and Foucault’s discourse, governmentality, and power/knowledge. The philosophical framework facilitated an appreciation of the early childhood education (ECE) sector and government discourses, via policies that exhibited discursive power, truths, and knowledges. This thesis’ approach was employed through a critical discourse analysis, incorporating Kristeva’s intertextuality, Fairclough’s manifest intertextuality and interdiscursivity, as well as a keyword search. This form of document analysis was selected because it enabled me as the researcher to gain a deeper more developed understanding of the policy texts, eliciting meaning and recognition of the discourses often naturalised within them. 
 
Contrary to the dominant claims in ECE literature concerning contemporary discourse, the analysis did not discover the neoliberal discourse’s predominance within the selected policies and documents, as was expected. The neoliberal discourse did exist within government endorsed texts, such as the foreword of Te Whāriki (Ministry of Education, 2017b) and Four Year Plan 2016-2020 (Ministry of Education, 2016). However, when the texts came closest to the sector, such as Te Whāraki (Ministry of Education, 1996; 2017b) and the Licensing Criteria Early Childhood Education and Care (Ministry of Education, 2008), the discourses of socialism, te Ao Māori and neoliberalism, nullified, transformed and modified one another. These findings were exemplified in the updated Te Whāraki (Ministry of Education, 2017b), that limited the neoliberal use of individualism from the original, while also upgrading children’s future potential. ‘Future’ within this text, however, was constructed through a modification of te Ao Māori by absorbing and embodying it in incomplete ways.  
 
This thesis analysed the presence of neoliberalism, socialism and te Ao Māori in fundamental policy documents that frame New Zealand early childhood practice. It did so to critically engage with, and thus make sense of, neoliberalism’s application and potential growth in New Zealand early childhood policies from 1989 to 2017. The research additionally focused on the interplay of socialist and te Ao Māori discourses in these texts, in conjunction with neoliberalism. It employed a poststructuralist conceptual framework that utilised Kristeva’s intertextuality and Foucault’s discourse, governmentality, and power/knowledge. The philosophical framework facilitated an appreciation of the early childhood education (ECE) sector and government discourses, via policies that exhibited discursive power, truths, and knowledges. This thesis’ approach was employed through a critical discourse analysis, incorporating Kristeva’s intertextuality, Fairclough’s manifest intertextuality and interdiscursivity, as well as a keyword search. This form of document analysis was selected because it enabled me as the researcher to gain a deeper more developed understanding of the policy texts, eliciting meaning and recognition of the discourses often naturalised within them. 
 
Contrary to the dominant claims in ECE literature concerning contemporary discourse, the analysis did not discover the neoliberal discourse’s predominance within the selected policies and documents, as was expected. The neoliberal discourse did exist within government endorsed texts, such as the foreword of Te Whāriki (Ministry of Education, 2017b) and Four Year Plan 2016-2020 (Ministry of Education, 2016). However, when the texts came closest to the sector, such as Te Whāraki (Ministry of Education, 1996; 2017b) and the Licensing Criteria Early Childhood Education and Care (Ministry of Education, 2008), the discourses of socialism, te Ao Māori and neoliberalism, nullified, transformed and modified one another. These findings were exemplified in the updated Te Whāraki (Ministry of Education, 2017b), that limited the neoliberal use of individualism from the original, while also upgrading children’s future potential. ‘Future’ within this text, however, was constructed through a modification of te Ao Māori by absorbing and embodying it in incomplete ways.  
 
The findings of this thesis imply socialism, te Ao Māori and neoliberalism are constantly competing with one another in the analysed policies that construct New Zealand ECE discourses and, as a consequence, influence practice. This plurality has the potential to hinder one discourse from gaining domination over the others. Their joint consumption's and conflicts appear to periodically lessen and strengthen neoliberalism’s power/knowledges across eras, administrations, policies and paragraphs, as exemplified in the updated curriculum. These findings imply that the ‘drivers’ of power are pivotal, hindering and strengthening these discourses which are both complementary and competing. Additionally, the thesis establishes implications regarding the rich complexities of discourses, which can conceal themselves in other discourses, calling for deeper critical reflection if some power/knowledges are to be reduced.

year: 2018