title: Estimating Teviot River compensation flow to offset evaporation loss from Lake Onslow pumped storage

authors: Bardsley, W. Earl

subjects: lake evaporation

abstract: Lake Onslow in New Zealand’s Central Otago region is under consideration for a major expansion to become the upper reservoir of a significant pumped storage scheme with 5 TWh energy storage capacity. The increased evaporation loss would likely lead to a requirement for compensation input of new water to the lake to maintain its mean outflow to the Teviot River. A simple expression is obtained that gives an upper bound of 1.5 m3s-1 for compensation flow if the lake is expanded to 60 km2. The compensation water could be derived from the pumping operation at the expense of some energy loss. Alternatively, water input without energy loss might be achieved by diverting some flow into Lake Onslow from the nearby Taieri River.

text: Estimating Teviot River compensation flow to offset evaporation loss from Lake Onslow pumped storage Lake Onslow in New Zealand’s Central Otago region is under consideration for a major expansion to become the upper reservoir of a significant pumped storage scheme with 5 TWh energy storage capacity. The increased evaporation loss would likely lead to a requirement for compensation input of new water to the lake to maintain its mean outflow to the Teviot River. A simple expression is obtained that gives an upper bound of 1.5 m3s-1 for compensation flow if the lake is expanded to 60 km2. The compensation water could be derived from the pumping operation at the expense of some energy loss. Alternatively, water input without energy loss might be achieved by diverting some flow into Lake Onslow from the nearby Taieri River.

year: 2022

title: Topic indexing with Wikipedia

authors: Medelyan, Olena

subjects: computer science

abstract: Wikipedia article names can be utilized as a controlled vocabulary for identifying the main topics in a document. Wikipedia’s 2M articles cover the terminology of nearly any document collection, which permits controlled indexing in the absence of manually created vocabularies. We combine state-of-art strategies for automatic controlled indexing with Wikipedia’s unique property- a richly hyperlinked encyclopedia. We evaluated the scheme by comparing automatically assigned topics with those chosen manually by human indexers. Analysis of indexing consistency shows that our algorithm outperforms some human subjects.

text: Topic indexing with Wikipedia Wikipedia article names can be utilized as a controlled vocabulary for identifying the main topics in a document. Wikipedia’s 2M articles cover the terminology of nearly any document collection, which permits controlled indexing in the absence of manually created vocabularies. We combine state-of-art strategies for automatic controlled indexing with Wikipedia’s unique property- a richly hyperlinked encyclopedia. We evaluated the scheme by comparing automatically assigned topics with those chosen manually by human indexers. Analysis of indexing consistency shows that our algorithm outperforms some human subjects.

year: 2008

title: Learning in later life: a bicultural perspective from Aotearoa/New Zealand

authors: Findsen, Brian

abstract: This article is concerned with how learning in later life has been constructed and practised by the two most numerous ethnic groups in Aotearoa/New Zealand, Pākėhā (Europeans) and Māori (Indigenous people). It is argued that learning is heavily influenced by historic features of interaction between these two groups; Pākehā as the dominant cultural and economic group and Māori as subordinate. While contemporary perspectives are necessarily interpreted in the light of historical trends and events, fresh interpretations of what constitutes biculturalism in this country allow for more nuanced understanding of possibilities for and obstacles to older adult learning/education. Themes from lifelong learning are analysed with special reference to older people’s learning, the consequences of Māori sovereignty on pedagogy and trends identified for older adult education. Two linked case studies of Pākehā and Māori older adult education in a New Zealand university are described to illustrate complexities and tensions in provision in a bicultural context.

text: Learning in later life: a bicultural perspective from Aotearoa/New Zealand This article is concerned with how learning in later life has been constructed and practised by the two most numerous ethnic groups in Aotearoa/New Zealand, Pākėhā (Europeans) and Māori (Indigenous people). It is argued that learning is heavily influenced by historic features of interaction between these two groups; Pākehā as the dominant cultural and economic group and Māori as subordinate. While contemporary perspectives are necessarily interpreted in the light of historical trends and events, fresh interpretations of what constitutes biculturalism in this country allow for more nuanced understanding of possibilities for and obstacles to older adult learning/education. Themes from lifelong learning are analysed with special reference to older people’s learning, the consequences of Māori sovereignty on pedagogy and trends identified for older adult education. Two linked case studies of Pākehā and Māori older adult education in a New Zealand university are described to illustrate complexities and tensions in provision in a bicultural context.

year: 2016