title: Transient vibration analysis of a completely free plate using modes obtained by Gorman's superposition method

authors: Ilanko, Sinniah

subjects: transient vibration

abstract: This paper shows that the transient response of a plate undergoing flexural vibration can be calculated accurately and efficiently using the natural frequencies and modes obtained from the superposition method. The response of a completely free plate is used to demonstrate this. The case considered is one where all supports of a simply supported thin rectangular plate under self weight are suddenly removed. The resulting motion consists of a combination of the natural modes of a completely free plate. The modal superposition method is used for determining the transient response, and the natural frequencies and mode shapes of the plates used are obtained by Gorman's superposition method. These are compared with corresponding results based on the modes using the Rayleigh–Ritz method using the ordinary and degenerated free–free beam functions. There is an excellent agreement between the results from both approaches but the superposition method has shown faster convergence and the results may serve as benchmarks for the transient response of completely free plates.

text: Transient vibration analysis of a completely free plate using modes obtained by Gorman's superposition method This paper shows that the transient response of a plate undergoing flexural vibration can be calculated accurately and efficiently using the natural frequencies and modes obtained from the superposition method. The response of a completely free plate is used to demonstrate this. The case considered is one where all supports of a simply supported thin rectangular plate under self weight are suddenly removed. The resulting motion consists of a combination of the natural modes of a completely free plate. The modal superposition method is used for determining the transient response, and the natural frequencies and mode shapes of the plates used are obtained by Gorman's superposition method. These are compared with corresponding results based on the modes using the Rayleigh–Ritz method using the ordinary and degenerated free–free beam functions. There is an excellent agreement between the results from both approaches but the superposition method has shown faster convergence and the results may serve as benchmarks for the transient response of completely free plates.

year: 2010

title: Cognitive functions associated with consumption of traditional volumes of kava (Piper methysticum): A feasibility study

authors: Aporosa, S. 'Apo'

abstract: Kava (Piper methysticum) is a traditional and culturally significant Pacific Island beverage, which contains active compounds called kavalactones that produce soporific relaxant effects similar to Benzodiazepine (Sarris et al, 2012, Human Psychopharmacology Clinical and Experimental, 27:262-9). Traditional kava drinkers frequently exceed the pharmacologically recommended amount of ≤300mg of kavalactones/day by 30 times (Aporosa & Tomlinson, 2014, Anthropologica, 56:163-75). Little is known about cognitive function at this high consumption rate. With Pacific peoples in New Zealand over represented in motor vehicle accidents, Police suspect traditional kava use may be a contributing factor. Previous research (Aporosa, 2017, Journal of Psychopharmacology, 31[8], A84) used an industry standard measure of drug driving to examine cognitive functions of kava users in a naturalistic setting. The industry standard measure revealed no statistical differences in cognitive functioning between kava users and control participants, despite observation of slowed movement and slurred speech by the kava users. Consequently, with full study utility as a goal, the feasibility of using a new psychometric measure of cognitive functioning – the Brain Gauge (BG) – was examined in a naturalistic setting.

text: Cognitive functions associated with consumption of traditional volumes of kava (Piper methysticum): A feasibility study Kava (Piper methysticum) is a traditional and culturally significant Pacific Island beverage, which contains active compounds called kavalactones that produce soporific relaxant effects similar to Benzodiazepine (Sarris et al, 2012, Human Psychopharmacology Clinical and Experimental, 27:262-9). Traditional kava drinkers frequently exceed the pharmacologically recommended amount of ≤300mg of kavalactones/day by 30 times (Aporosa & Tomlinson, 2014, Anthropologica, 56:163-75). Little is known about cognitive function at this high consumption rate. With Pacific peoples in New Zealand over represented in motor vehicle accidents, Police suspect traditional kava use may be a contributing factor. Previous research (Aporosa, 2017, Journal of Psychopharmacology, 31[8], A84) used an industry standard measure of drug driving to examine cognitive functions of kava users in a naturalistic setting. The industry standard measure revealed no statistical differences in cognitive functioning between kava users and control participants, despite observation of slowed movement and slurred speech by the kava users. Consequently, with full study utility as a goal, the feasibility of using a new psychometric measure of cognitive functioning – the Brain Gauge (BG) – was examined in a naturalistic setting.

year: 2019

title: Keynote address: Dr. Catherine Love

authors: Love, Catherine

subjects: Maori

abstract: This keynote address for the National Māori Graduates of Psychology Symposium 2002 addresses the history and current state of psychology in New Zealand, with particular attention to issues affecting Maori.

text: Keynote address: Dr. Catherine Love This keynote address for the National Māori Graduates of Psychology Symposium 2002 addresses the history and current state of psychology in New Zealand, with particular attention to issues affecting Maori.

year: 2003