title: Efficiency enhancement to a linear AC voltage regulator: Multi-winding versus multi-transformer design

authors: Wijesooriya, Priyanwada Nimesha

abstract: Electricity distribution companies are required to supply electric power, which conforms to accepted standards, that place limits on voltage fluctuations beyond nominal values. However, it is common for these fluctuations to exceed the specified standards. One solution to this problem is to install stand-alone RMS voltage regulators at the consumer site. Commonly available AC regulators typically have limitations such as slow response time, flattened sine wave output, low efficiency, and limited operating range. The linear AC voltage regulator is a relatively new type of solid-state, single-phase AC regulator for consumer-end, which addresses most of the above issues. It is based on a series transistor-array coupled with a line-frequency transformer that works seamlessly from boost-to-buck mode in the range of 0.8−1.1 per-unit values of line voltage, without a need of any transformer configuration changes. However, previous prototypes exhibited reduced efficiency when the line voltage exceeded the nominal value. This paper presents two alternative designs that achieve efficiencies of 90−95%, usually required in commercial implementation. Analytical and experimental results of a multi-winding versus multi-transformer based prototypes of 300VA output capacity are presented.

text: Efficiency enhancement to a linear AC voltage regulator: Multi-winding versus multi-transformer design Electricity distribution companies are required to supply electric power, which conforms to accepted standards, that place limits on voltage fluctuations beyond nominal values. However, it is common for these fluctuations to exceed the specified standards. One solution to this problem is to install stand-alone RMS voltage regulators at the consumer site. Commonly available AC regulators typically have limitations such as slow response time, flattened sine wave output, low efficiency, and limited operating range. The linear AC voltage regulator is a relatively new type of solid-state, single-phase AC regulator for consumer-end, which addresses most of the above issues. It is based on a series transistor-array coupled with a line-frequency transformer that works seamlessly from boost-to-buck mode in the range of 0.8−1.1 per-unit values of line voltage, without a need of any transformer configuration changes. However, previous prototypes exhibited reduced efficiency when the line voltage exceeded the nominal value. This paper presents two alternative designs that achieve efficiencies of 90−95%, usually required in commercial implementation. Analytical and experimental results of a multi-winding versus multi-transformer based prototypes of 300VA output capacity are presented.

year: 2020-06-18

title: Retention and intentions of professional accountants

authors: Twiname, Linda J.

subjects: job design

abstract: This paper enhances understanding of factors underlying professional accountants’ high turnover rates. Various researchers, institutions and government bodies have identified accountants’ retention is of concern. However, traditional explanations, such as job satisfaction and organizational commitment, do not sufficiently account for the turnover rates observed in the accounting profession. A New Zealand (NZ) sample of professional accountants enabled us to identify a range of factor. Intentions to stay were very low, 50% of accountants expected to leave their current employer within 3 years of the survey date. Satisfaction with two core job characteristics, feedback and skill variety, in addition to work life balance (WLB) accounted for 65% of the variance of overall job satisfaction. WLB, or at least a lack of access to flexible work arrangements was strongly indicated as the primary consideration when choosing to remain with the present employer.

text: Retention and intentions of professional accountants This paper enhances understanding of factors underlying professional accountants’ high turnover rates. Various researchers, institutions and government bodies have identified accountants’ retention is of concern. However, traditional explanations, such as job satisfaction and organizational commitment, do not sufficiently account for the turnover rates observed in the accounting profession. A New Zealand (NZ) sample of professional accountants enabled us to identify a range of factor. Intentions to stay were very low, 50% of accountants expected to leave their current employer within 3 years of the survey date. Satisfaction with two core job characteristics, feedback and skill variety, in addition to work life balance (WLB) accounted for 65% of the variance of overall job satisfaction. WLB, or at least a lack of access to flexible work arrangements was strongly indicated as the primary consideration when choosing to remain with the present employer.

year: 2012-06-30

title: A Kaupapa Māori Intervention on Apology for LDS Church's Racism, Zombie Concepts, and Moving Forward

authors: Simon, Hemopereki

abstract: This intervention paper, based on the Kaupapa Māori writing inquiry, aims to offer an alternative path forward to the idea that The Church of Jesus Christ of Latter-day Saints should apologise for its racism. It argues that an apology is redundant to the Indigenous World. The goal is for better Church-Indigenous relations in the face of racism rooted in The Book of Mormon, Church Policy, doctrine, teachings, and theology. The author develops a positionality and outlines mahi tuhituhi as a Kaupapa Māori (post) qualitative writing inquiry. The Author then moves to contextualise these issues by framing them with what sociologists describe as Zombie Concepts. A brief overview of the Book of Mormon and its significance in Mormonism is provided. Following that, an understanding of the connection between Aileen Moreton-Robinson's white possessive and Lamanitism is provided. Hagoth and his relationship with Tāngata Moana (Māori and Pacific Peoples) is then addressed. Recent remarks by Thomas Murphy to help readers understand the racism in the Book of Mormon. Other issues for Indigenous Peoples are highlighted, with an emphasis on anachronisms and the Book of Mormon's plagiarism. The investigation then shifts to provide Veracini's commentary on settling to build relationality is discussed from the viewpoint of Aotearoa New Zealand. A discussion of the issues is followed by an outline of the research's consequences, which include seven issues that need to be addressed as part of the relationality building in order to create a collaborative future values-based project to move Church-Indigenous relations forward in a positive way.

text: A Kaupapa Māori Intervention on Apology for LDS Church's Racism, Zombie Concepts, and Moving Forward This intervention paper, based on the Kaupapa Māori writing inquiry, aims to offer an alternative path forward to the idea that The Church of Jesus Christ of Latter-day Saints should apologise for its racism. It argues that an apology is redundant to the Indigenous World. The goal is for better Church-Indigenous relations in the face of racism rooted in The Book of Mormon, Church Policy, doctrine, teachings, and theology. The author develops a positionality and outlines mahi tuhituhi as a Kaupapa Māori (post) qualitative writing inquiry. The Author then moves to contextualise these issues by framing them with what sociologists describe as Zombie Concepts. A brief overview of the Book of Mormon and its significance in Mormonism is provided. Following that, an understanding of the connection between Aileen Moreton-Robinson's white possessive and Lamanitism is provided. Hagoth and his relationship with Tāngata Moana (Māori and Pacific Peoples) is then addressed. Recent remarks by Thomas Murphy to help readers understand the racism in the Book of Mormon. Other issues for Indigenous Peoples are highlighted, with an emphasis on anachronisms and the Book of Mormon's plagiarism. The investigation then shifts to provide Veracini's commentary on settling to build relationality is discussed from the viewpoint of Aotearoa New Zealand. A discussion of the issues is followed by an outline of the research's consequences, which include seven issues that need to be addressed as part of the relationality building in order to create a collaborative future values-based project to move Church-Indigenous relations forward in a positive way.

year: 2023