title: Improving Naive Bayes for regression with optimised artificial surrogate data

authors: Mayo, Michael

subjects: cs.AI

abstract: Can we evolve better training data for machine learning algorithms? To investigate this question we use population-based optimisation algorithms to generate artificial surrogate training data for naive Bayes for regression. We demonstrate that the generalisation performance of naive Bayes for regression models is enhanced by training them on the artificial data as opposed to the real data. These results are important for two reasons. Firstly, naive Bayes models are simple and interpretable but frequently underperform compared to more complex "black box" models, and therefore new methods of enhancing accuracy are called for. Secondly, the idea of using the real training data indirectly in the construction of the artificial training data, as opposed to directly for model training, is a novel twist on the usual machine learning paradigm.

text: Improving Naive Bayes for regression with optimised artificial surrogate data Can we evolve better training data for machine learning algorithms? To investigate this question we use population-based optimisation algorithms to generate artificial surrogate training data for naive Bayes for regression. We demonstrate that the generalisation performance of naive Bayes for regression models is enhanced by training them on the artificial data as opposed to the real data. These results are important for two reasons. Firstly, naive Bayes models are simple and interpretable but frequently underperform compared to more complex "black box" models, and therefore new methods of enhancing accuracy are called for. Secondly, the idea of using the real training data indirectly in the construction of the artificial training data, as opposed to directly for model training, is a novel twist on the usual machine learning paradigm.

year: 2020

title: Boat electrofishing survey of Apata Pond and Lake McLaren

authors: Hicks, Brendan J.

subjects: New Zealand

abstract: We used New Zealand’s first successful electrofishing boat to catch koi carp (Cyprinus carpio haemaotopterus; Zhou et al. 2003) and rudd (Scardinius erythophthalmus) at two sites in the Bay of Plenty, North Island, New Zealand. Five large koi carp were caught in a pond near Apata; shortfinned eels and adult inanga were also caught. In Lake McLaren, a small hydro-electric impoundment on the Wairoa River, two rudd were caught; longfinned eels (Anguilla dieffenbachii), common bullies (Gobiomorphus cotidianus), and brown and rainbow trout (Salmo trutta and Oncorhynchus mykiss) were also caught.
Low ambient conductivities (43-90 µS cm⁻¹) is likely to have restricted the electrofishing field and power transfer to the fish, but fish capture was still successful. Clear water compensated somewhat for the reduced effectiveness of the field.
Fish densities were low at both locations. The minimum fish density was 0.31 fish 100 m⁻² in the pond at Apata, and 0.61 fish 100 m⁻² in Lake McLaren.  These should be regarded as minimal densities because only a single pass was conducted. All the koi carp caught in the pond at Apata were 521 to 564 mm fork length and all were 8 years old; there were two males and three females. One female was about to spawn; however, no other koi carp were found, so breeding appears to have been unsuccessful in this habitat. The two rudd from Lake McLaren were 203 and 240 mm fork length 6 and 7 years old respectively. Thought no younger age classes were caught, we cannot exclude the possibility that rudd could reproduce successfully in Lake McLaren.

text: Boat electrofishing survey of Apata Pond and Lake McLaren We used New Zealand’s first successful electrofishing boat to catch koi carp (Cyprinus carpio haemaotopterus; Zhou et al. 2003) and rudd (Scardinius erythophthalmus) at two sites in the Bay of Plenty, North Island, New Zealand. Five large koi carp were caught in a pond near Apata; shortfinned eels and adult inanga were also caught. In Lake McLaren, a small hydro-electric impoundment on the Wairoa River, two rudd were caught; longfinned eels (Anguilla dieffenbachii), common bullies (Gobiomorphus cotidianus), and brown and rainbow trout (Salmo trutta and Oncorhynchus mykiss) were also caught.
Low ambient conductivities (43-90 µS cm⁻¹) is likely to have restricted the electrofishing field and power transfer to the fish, but fish capture was still successful. Clear water compensated somewhat for the reduced effectiveness of the field.
Fish densities were low at both locations. The minimum fish density was 0.31 fish 100 m⁻² in the pond at Apata, and 0.61 fish 100 m⁻² in Lake McLaren.  These should be regarded as minimal densities because only a single pass was conducted. All the koi carp caught in the pond at Apata were 521 to 564 mm fork length and all were 8 years old; there were two males and three females. One female was about to spawn; however, no other koi carp were found, so breeding appears to have been unsuccessful in this habitat. The two rudd from Lake McLaren were 203 and 240 mm fork length 6 and 7 years old respectively. Thought no younger age classes were caught, we cannot exclude the possibility that rudd could reproduce successfully in Lake McLaren.

year: 2004

title: Claiming collective space: Kaupapa Maori in psychology

authors: Levy, Michelle Patricia

subjects: Maori

abstract: From its inception, the Psychology Department at the University of Waikato has had a focus on issues of culture, particularly those of relevance for Maori, with these early foundations laid by Emeritus Professor James Ritchie, who in 1965 took up the founding chair of the Department. These foundations have continued to be built on, utilising a variety of different strategies. Drawing on a research base which has emerged primarily from within the Maori and Psychology Research Unit at Waikato University, this paper explores strategies which have served to carve out and claim space for Maori, both within the department, and within the wider discipline of psychology.

text: Claiming collective space: Kaupapa Maori in psychology From its inception, the Psychology Department at the University of Waikato has had a focus on issues of culture, particularly those of relevance for Maori, with these early foundations laid by Emeritus Professor James Ritchie, who in 1965 took up the founding chair of the Department. These foundations have continued to be built on, utilising a variety of different strategies. Drawing on a research base which has emerged primarily from within the Maori and Psychology Research Unit at Waikato University, this paper explores strategies which have served to carve out and claim space for Maori, both within the department, and within the wider discipline of psychology.

year: 2008