title: The Implementation in VISSIM REALTIME of an Active Electromagnetic Damper Controller for Lightweight Electric Vehicles

authors: Fow, Alista John

subjects: active

abstract: The use of linear electromagnetic active damper units in the suspension system of a lightweight electric vehicle offers many advantages over conventional passive, semi-active and active hydraulic dampers. While full active hydraulic systems have been commercially available in automobiles for many years, the linear electromagnetic active damper offers a lower weight system with a much reduced power demand. However an active system requires the use of a controller to adjust the power output to the damper unit. This unit must process signal inputs and provide an output solution within a short time period, often 5 milliseconds or less. By using VISSIM REALTIME, a controller was built that controlled a scale linear electromagnetic damper using Karnopp’s Skyhook algorithm. This had to deal with issues such as accelerometer drift and signal to noise ratio. These required simple but fast techniques to provide useful information to the damper in a useful timeframe. This controller-damper combination proved effective in reducing the vibration experienced by the sprung mass and was more effective than an ideal passive damper at all frequencies tested by at least a factor of three.

text: The Implementation in VISSIM REALTIME of an Active Electromagnetic Damper Controller for Lightweight Electric Vehicles The use of linear electromagnetic active damper units in the suspension system of a lightweight electric vehicle offers many advantages over conventional passive, semi-active and active hydraulic dampers. While full active hydraulic systems have been commercially available in automobiles for many years, the linear electromagnetic active damper offers a lower weight system with a much reduced power demand. However an active system requires the use of a controller to adjust the power output to the damper unit. This unit must process signal inputs and provide an output solution within a short time period, often 5 milliseconds or less. By using VISSIM REALTIME, a controller was built that controlled a scale linear electromagnetic damper using Karnopp’s Skyhook algorithm. This had to deal with issues such as accelerometer drift and signal to noise ratio. These required simple but fast techniques to provide useful information to the damper in a useful timeframe. This controller-damper combination proved effective in reducing the vibration experienced by the sprung mass and was more effective than an ideal passive damper at all frequencies tested by at least a factor of three.

year: 2015-02-17

title: Physical education in primary schools: holding on to the past or heading for a different future?

authors: Petrie, Kirsten Culhane

subjects: primary schools

abstract: This paper reports on research undertaken by Pétrie, jones, and McKlm (2007)' during 2006, as part of a Ministry of Education funded evaluation ofthe Impacts of professional learning on currlcular and co-currlcular physical activity. While the evaluative research explored physical activity In the broadest sense, this paper concentrates specifically on the aspect ofthe research that focussed on physical education [PEj as a curriculum subject. The paper provides a snapshot of how PE ¡s understood and practised by generallst teachers In ten primary schools. It then identifies some of the factors that contribute to interpretations and delivery of PE, and Issues that need to be addressed If PE is to move beyond the past and towards an alternative future.

text: Physical education in primary schools: holding on to the past or heading for a different future? This paper reports on research undertaken by Pétrie, jones, and McKlm (2007)' during 2006, as part of a Ministry of Education funded evaluation ofthe Impacts of professional learning on currlcular and co-currlcular physical activity. While the evaluative research explored physical activity In the broadest sense, this paper concentrates specifically on the aspect ofthe research that focussed on physical education [PEj as a curriculum subject. The paper provides a snapshot of how PE ¡s understood and practised by generallst teachers In ten primary schools. It then identifies some of the factors that contribute to interpretations and delivery of PE, and Issues that need to be addressed If PE is to move beyond the past and towards an alternative future.

year: 2008

title: Echoed silencing in Te Whare/Tangata

authors: Lewis, Cassandra Louise Terauhina

subjects: Mana Wāhine

abstract: Wāhine Māori voices are suppressed due to multiple intersecting factors in Aotearoa which negatively impact our lived realities. The aim of this thesis is to foreground wāhine voice and identity within a settler colonial housing system. The current ‘housing crisis’ has been an issue of interest in academia focusing on housing insecurity, homelessness and neoliberalism. Additionally, the criminalisation of Māori has been explored by scholars to a similar extent, especially the pipelining of Māori into incarceration and precarity through policing and surveillance strategies. However, how the criminal justice system and the housing systems interact is scarcely investigated in Aotearoa, and moreover, has not been examined through a Mana wāhine theoretical framework. Mana Wāhine scholars have long critiqued colonisation and the accompanying practices, ideologies and discourses of difference that misrepresent wāhine as the ‘savage other’. How wāhine Māori are constructed through political discourse and factors leading to the silencing of wāhine are at the forefront of this inquiry and moreover, wāhine resistance, survival and aspirations while navigating a discriminatory housing system is examined.

Political and Western discourse contributes to the criminalisation and deficit framing of wāhine as the ‘undeserving poor’ and ‘criminal other’ which subsequently silences wāhine and encourages discriminatory practices. This thesis contends that the channelling of wāhine Māori into a precarious population, the criminalisation of wāhine Māori, and the colonial discourses surrounding wāhine interact together and create barriers to wāhine Māori access to housing. An analysis of housing discourse, alongside wāhine perspectives provides a counter-narrative of the lived reality and voice from wāhine who reside in a predominantly precarious and Māori populated area. The findings show cases of surveillance, discrimination, social policing and steering wāhine Māori into unhealthy living conditions, however, wāhine were also creative in their practices of resistance and survivance.

text: Echoed silencing in Te Whare/Tangata Wāhine Māori voices are suppressed due to multiple intersecting factors in Aotearoa which negatively impact our lived realities. The aim of this thesis is to foreground wāhine voice and identity within a settler colonial housing system. The current ‘housing crisis’ has been an issue of interest in academia focusing on housing insecurity, homelessness and neoliberalism. Additionally, the criminalisation of Māori has been explored by scholars to a similar extent, especially the pipelining of Māori into incarceration and precarity through policing and surveillance strategies. However, how the criminal justice system and the housing systems interact is scarcely investigated in Aotearoa, and moreover, has not been examined through a Mana wāhine theoretical framework. Mana Wāhine scholars have long critiqued colonisation and the accompanying practices, ideologies and discourses of difference that misrepresent wāhine as the ‘savage other’. How wāhine Māori are constructed through political discourse and factors leading to the silencing of wāhine are at the forefront of this inquiry and moreover, wāhine resistance, survival and aspirations while navigating a discriminatory housing system is examined.

Political and Western discourse contributes to the criminalisation and deficit framing of wāhine as the ‘undeserving poor’ and ‘criminal other’ which subsequently silences wāhine and encourages discriminatory practices. This thesis contends that the channelling of wāhine Māori into a precarious population, the criminalisation of wāhine Māori, and the colonial discourses surrounding wāhine interact together and create barriers to wāhine Māori access to housing. An analysis of housing discourse, alongside wāhine perspectives provides a counter-narrative of the lived reality and voice from wāhine who reside in a predominantly precarious and Māori populated area. The findings show cases of surveillance, discrimination, social policing and steering wāhine Māori into unhealthy living conditions, however, wāhine were also creative in their practices of resistance and survivance.

year: 2021