title: Surge capability testing of supercapacitor families using a lightning surge simulator

authors: Kularatna, Nihal

subjects: Equivalent circuits

abstract: Supercapacitors (SCs) are capable of storing energy in the range of fractional joules to several thousands of joules despite their lower dc voltage ratings. Farad-order capacitances combined with milliohm-order equivalent series resistances provide time constants ranging from fractional seconds to seconds. Given these time constants, compared to the time durations of power line transients in the range of a few microseconds to several hundreds of microseconds, these devices may be able to withstand short-duration surges with energy values specified in IEEE C62-XX series, IEC 61400-4-5, and similar standards. However, there is little or no manufacturer datasheet information on these aspects. This paper provides details of an automatic tester interfaced with a lightning surge simulator, a test procedure, and summarized test data on three different families of SCs. The test data set provides some valuable insight in estimating the capabilities of these new SC families to withstand surges and transients, which, in turn, could lead to nontraditional applications.

text: Surge capability testing of supercapacitor families using a lightning surge simulator Supercapacitors (SCs) are capable of storing energy in the range of fractional joules to several thousands of joules despite their lower dc voltage ratings. Farad-order capacitances combined with milliohm-order equivalent series resistances provide time constants ranging from fractional seconds to seconds. Given these time constants, compared to the time durations of power line transients in the range of a few microseconds to several hundreds of microseconds, these devices may be able to withstand short-duration surges with energy values specified in IEEE C62-XX series, IEC 61400-4-5, and similar standards. However, there is little or no manufacturer datasheet information on these aspects. This paper provides details of an automatic tester interfaced with a lightning surge simulator, a test procedure, and summarized test data on three different families of SCs. The test data set provides some valuable insight in estimating the capabilities of these new SC families to withstand surges and transients, which, in turn, could lead to nontraditional applications.

year: 2011

title: Principal-principal conflicts: Is it a big problem in ASEAN 4 markets?

authors: Banchit, Azilawati

subjects: principal-principal conflicts

abstract: This paper examines the issue of principal-principal (PP) conflicts in large public listed companies in four ASEAN countries. The PP conflicts are regarded as a major problem in emerging markets and have attracted considerable attention. The percentage of cash dividend of total assets is used to measure the expropriation depicted in PP conflicts. A sample of companies with total assets of US$1 billion are filtered to select those with single/multiple block holders of shareholdings concentration equal to or greater than five percent. A regression model is estimated with PP conflicts as the dependent variable. The findings confirm the existence of PP conflicts, suggesting that large shareholders do expropriate company wealth by paying higher cash dividends. This expropriation occurs through agency perspective and makes it apparent that PP conflicts are a major problem in ASEAN markets.

text: Principal-principal conflicts: Is it a big problem in ASEAN 4 markets? This paper examines the issue of principal-principal (PP) conflicts in large public listed companies in four ASEAN countries. The PP conflicts are regarded as a major problem in emerging markets and have attracted considerable attention. The percentage of cash dividend of total assets is used to measure the expropriation depicted in PP conflicts. A sample of companies with total assets of US$1 billion are filtered to select those with single/multiple block holders of shareholdings concentration equal to or greater than five percent. A regression model is estimated with PP conflicts as the dependent variable. The findings confirm the existence of PP conflicts, suggesting that large shareholders do expropriate company wealth by paying higher cash dividends. This expropriation occurs through agency perspective and makes it apparent that PP conflicts are a major problem in ASEAN markets.

year: 2011-09

title: A local Aotearoa New Zealand investigation of the contribution of Māori cultural knowledges to Pakeha identity and counselling practices

authors: Te Wiata, Joy

subjects: Pakeha identity

abstract: This project investigates the experiences of a small group of social service  practitioners as they consider the question of what it means to be Pakeha in Aotearoa New Zealand in 2004.  Specifically this study considers the contribution  of Māori cultural knowledges to Pakeha identity.  It also explores whether therapeutic practices that participants have available, are relevant to their current  claims of Pakeha identity.   This study highlights the complexity of experience and multiple stories that inform constructions of identity.   In approaching the topic I was aware that many  important stories of people's lived experience are not often told.  People are often silenced due to the difficulty of 'telling'.  In this exploration, space was created  for the telling of stories, which are often not easily told:  stories of struggle and pain; stories of compassionate witnessing; stories of rule-breaking; stories of  stepping into territory beyond binaries and stories of richness and delight.   Knowledges have been produced that indicate the need for carefully crafted space for often very difficult identity conversations to occur and for voices to be heard.   Further, the study has produced knowledges for scaffolding for respectful and honouring conversations .  The stories of this project indicate that the  conversations required, have their foundation through engagement with the value of fairness.  Findings also indicate that forums, where mutual contribution to  identity for both Māori and Pakeha can be acknowledged, are a critical to establishing ongoing honourable relationships between Pakeha and Māori New Zealanders.     Throughout this project participants acknowledge and honour the rich  contribution of Māori knowledges and language to their Pakeha identity.

text: A local Aotearoa New Zealand investigation of the contribution of Māori cultural knowledges to Pakeha identity and counselling practices This project investigates the experiences of a small group of social service  practitioners as they consider the question of what it means to be Pakeha in Aotearoa New Zealand in 2004.  Specifically this study considers the contribution  of Māori cultural knowledges to Pakeha identity.  It also explores whether therapeutic practices that participants have available, are relevant to their current  claims of Pakeha identity.   This study highlights the complexity of experience and multiple stories that inform constructions of identity.   In approaching the topic I was aware that many  important stories of people's lived experience are not often told.  People are often silenced due to the difficulty of 'telling'.  In this exploration, space was created  for the telling of stories, which are often not easily told:  stories of struggle and pain; stories of compassionate witnessing; stories of rule-breaking; stories of  stepping into territory beyond binaries and stories of richness and delight.   Knowledges have been produced that indicate the need for carefully crafted space for often very difficult identity conversations to occur and for voices to be heard.   Further, the study has produced knowledges for scaffolding for respectful and honouring conversations .  The stories of this project indicate that the  conversations required, have their foundation through engagement with the value of fairness.  Findings also indicate that forums, where mutual contribution to  identity for both Māori and Pakeha can be acknowledged, are a critical to establishing ongoing honourable relationships between Pakeha and Māori New Zealanders.     Throughout this project participants acknowledge and honour the rich  contribution of Māori knowledges and language to their Pakeha identity.

year: 2006