title: Selecting multiway splits in decision trees

authors: Frank, Eibe

subjects: computer science

abstract: Decision trees in which numeric attributes are split several ways are more comprehensible than the usual binary trees because attributes rarely appear more than once in any path from root to leaf. There are efficient algorithms for finding the optimal multiway split for a numeric attribute, given the number of intervals in which it is to be divided. The problem we tackle is how to choose this number in order to obtain small, accurate trees.

text: Selecting multiway splits in decision trees Decision trees in which numeric attributes are split several ways are more comprehensible than the usual binary trees because attributes rarely appear more than once in any path from root to leaf. There are efficient algorithms for finding the optimal multiway split for a numeric attribute, given the number of intervals in which it is to be divided. The problem we tackle is how to choose this number in order to obtain small, accurate trees.

year: 1996-12

title: Running the race: Competition discourse and broadband growth in Aotearoa New Zealand

authors: Ganesh, Shiv

subjects: broadband

abstract: The objective of this study is to understand key aspects of contemporary discourse surrounding telecommunications development in Aotearoa New Zealand after the privatization of telecommunications in the late 1980s. We identify various characteristics of discourse on competition and telecommunication and trace how competition discourse was rhetorically positioned in attempts to produce economic, political and cultural outcomes. In particular, we argue that a race metaphor underpinned discussions about competition in broadband development. The race metaphor itself was raced inasmuch as it tapped into national anxieties about Aotearoa New Zealand’s place in the ‘developed’ world in order to motivate action on broadband policy. We also found that competition discourse in relation to broadband policy exhibited inherent contradictions in promoting control, in the form of increased regulation, while simultaneously promoting freedom, in the form of ‘unbundling’. Implications for understanding broadband growth as well as competition discourse itself are discussed.

text: Running the race: Competition discourse and broadband growth in Aotearoa New Zealand The objective of this study is to understand key aspects of contemporary discourse surrounding telecommunications development in Aotearoa New Zealand after the privatization of telecommunications in the late 1980s. We identify various characteristics of discourse on competition and telecommunication and trace how competition discourse was rhetorically positioned in attempts to produce economic, political and cultural outcomes. In particular, we argue that a race metaphor underpinned discussions about competition in broadband development. The race metaphor itself was raced inasmuch as it tapped into national anxieties about Aotearoa New Zealand’s place in the ‘developed’ world in order to motivate action on broadband policy. We also found that competition discourse in relation to broadband policy exhibited inherent contradictions in promoting control, in the form of increased regulation, while simultaneously promoting freedom, in the form of ‘unbundling’. Implications for understanding broadband growth as well as competition discourse itself are discussed.

year: 2011-07

title: Geothermal energy, decarbonisation and the just transition: developments in governance and regulation

authors: Parson, Phoebe

abstract: This review article pursues this special issue’s theme of renewable energy and just transition into the field of geothermal energy, an energy source which has a special role in Aotearoa New Zealand, and which raises clear questions of justice in the energy transition. It evaluates the track record, and examines the legal, regulatory and institutional challenges and opportunities for a just transition for geothermal in New Zealand. It particularly considers the role of Māori, and the challenges presented by emerging technological change. It considers the problems of renewability and sustainability that are special to geothermal resources. It evaluates the just transition issues that have particularly affected Māori landowners and holders of mana whenua. It finds that what constitutes a just transition must be seen against a longer historical time frame than many observers might assume. It shows that the distinctive regulatory framework for geothermal has been considerably affected by addressing these problems but may need to adapt further in the future. It considers the technical features that have shaped geothermal regulation and are likely to shape it in the future as new technological options emerge.

text: Geothermal energy, decarbonisation and the just transition: developments in governance and regulation This review article pursues this special issue’s theme of renewable energy and just transition into the field of geothermal energy, an energy source which has a special role in Aotearoa New Zealand, and which raises clear questions of justice in the energy transition. It evaluates the track record, and examines the legal, regulatory and institutional challenges and opportunities for a just transition for geothermal in New Zealand. It particularly considers the role of Māori, and the challenges presented by emerging technological change. It considers the problems of renewability and sustainability that are special to geothermal resources. It evaluates the just transition issues that have particularly affected Māori landowners and holders of mana whenua. It finds that what constitutes a just transition must be seen against a longer historical time frame than many observers might assume. It shows that the distinctive regulatory framework for geothermal has been considerably affected by addressing these problems but may need to adapt further in the future. It considers the technical features that have shaped geothermal regulation and are likely to shape it in the future as new technological options emerge.

year: 2025