title: Abandonment and rapid infilling of a tide-dominated distributary channel at 0.7 ka in the Mekong River Delta

authors: Gugliotta, Marcello

abstract: The Ba Lai distributary channel of the Mekong River Delta was abandoned and infilled with sediment during the Late Holocene, providing a unique opportunity to investigate the sediment fill, timing and mechanisms of channel abandonment in tide-dominated deltaic systems. Based on analysis and age dating of four sediment cores, we show that the channel was active since 2.6 ka and was abandoned at 0.7 ka as marked by the abrupt disappearance of the sand fraction and increase in organic matter and sediment accumulation rate. We estimate that the channel might have been filled in a time range of 45–263 years after detachment from the deltaic network, with sediment accumulation rates of centimetres to decimetres per year, rapidly storing approximately 600 Mt of organic-rich mud. We suggest that the channel was abandoned due to a sediment buildup favoured by an increase in regional sediment supply to the delta. This study highlights that mechanisms for abandonment and infilling of tide-dominated deltaic channels do not entirely fit widely used models developed for fluvial-dominated environments. Their abandonment might be driven by autogenic factors related to the river-tidal and deltaic dynamics and favoured by allogenic factors (e.g., human impact and/or climate change).</jats:p>

text: Abandonment and rapid infilling of a tide-dominated distributary channel at 0.7 ka in the Mekong River Delta The Ba Lai distributary channel of the Mekong River Delta was abandoned and infilled with sediment during the Late Holocene, providing a unique opportunity to investigate the sediment fill, timing and mechanisms of channel abandonment in tide-dominated deltaic systems. Based on analysis and age dating of four sediment cores, we show that the channel was active since 2.6 ka and was abandoned at 0.7 ka as marked by the abrupt disappearance of the sand fraction and increase in organic matter and sediment accumulation rate. We estimate that the channel might have been filled in a time range of 45–263 years after detachment from the deltaic network, with sediment accumulation rates of centimetres to decimetres per year, rapidly storing approximately 600 Mt of organic-rich mud. We suggest that the channel was abandoned due to a sediment buildup favoured by an increase in regional sediment supply to the delta. This study highlights that mechanisms for abandonment and infilling of tide-dominated deltaic channels do not entirely fit widely used models developed for fluvial-dominated environments. Their abandonment might be driven by autogenic factors related to the river-tidal and deltaic dynamics and favoured by allogenic factors (e.g., human impact and/or climate change).</jats:p>

year: 2021

title: Agency costs, ownership structure and corporate governance mechanisms: A case study in New Zealand unlisted small companies

authors: Hewa Wellalage, Nirosha

subjects: corporate governance

abstract: This study investigates the linkage between agency costs, ownership structure and corporate governance in small business. Eleven years of data for 100 unlisted small businesses, are collected and 1099 observations are analysed using as dynamic panel GMM estimation. Various diagnostic tests are utilised to check for stationary and convergence of variables. The results indicate that ownership concentration has the most significant governance effect and also has the largest impact on corporate governance. Moreover, this study finds U-shape relationship between internal ownership and performance, which under that agency proxy. Agency costs vary with leverage the life of the business and with its size.

text: Agency costs, ownership structure and corporate governance mechanisms: A case study in New Zealand unlisted small companies This study investigates the linkage between agency costs, ownership structure and corporate governance in small business. Eleven years of data for 100 unlisted small businesses, are collected and 1099 observations are analysed using as dynamic panel GMM estimation. Various diagnostic tests are utilised to check for stationary and convergence of variables. The results indicate that ownership concentration has the most significant governance effect and also has the largest impact on corporate governance. Moreover, this study finds U-shape relationship between internal ownership and performance, which under that agency proxy. Agency costs vary with leverage the life of the business and with its size.

year: 2011

title: A Way Forward for Te Reo Maori in English-Medium Education

authors: Waikari, Arihia

subjects: Maori

abstract: Aotearoa is the home of the Māori people and their language; te reo Māori. When European settlers arrived, they brought with them a new language; English. The Treaty of Waitangi was signed in 1840 and guaranteed Māori rangatiratanga (chiefly control) over their taonga, including te reo Māori. Over the years a negative language shift has occurred with many Māori moving from speaking te reo Māori to English. Although many initiatives, such as kōhanga reo were implemented in the 1980s, te reo Māori is still in a critical state. This research project is about te reo Māori experiences of both Māori and non-Māori whom were all attached to a English-medium primary school in Aotearoa/New Zealand. This study sought to understand the ways in which te reo Māori was being passed on, or not, from person to person and from one generation to the next.

text: A Way Forward for Te Reo Maori in English-Medium Education Aotearoa is the home of the Māori people and their language; te reo Māori. When European settlers arrived, they brought with them a new language; English. The Treaty of Waitangi was signed in 1840 and guaranteed Māori rangatiratanga (chiefly control) over their taonga, including te reo Māori. Over the years a negative language shift has occurred with many Māori moving from speaking te reo Māori to English. Although many initiatives, such as kōhanga reo were implemented in the 1980s, te reo Māori is still in a critical state. This research project is about te reo Māori experiences of both Māori and non-Māori whom were all attached to a English-medium primary school in Aotearoa/New Zealand. This study sought to understand the ways in which te reo Māori was being passed on, or not, from person to person and from one generation to the next.

year: 2011