title: Life-history of Lake Horowhenua common smelt: analysis of otolith chemistry and vertebral counts

authors: Tana, Raymond

subjects: Lake Horowhenua

abstract: Lake Horowhenua is a coastal eutrophic lake on the west coast of the North Island. A recent survey of the lake found lower than expected fish diversity but comparatively abundant native fish populations, comprising mostly shortfin and longfin eels (Anguilla australis and A. dieffenbachii). A weir on the outlet of the lake was ifentified as a potential barrier to fish migrations, reducing fish diversity and abundance in the lake. However, large numbers of common smelt (Retropinna retropinna) were collected during this survey, indicating that the population was eighter successfully reproducing in the lake or diadromous, i.e., migrating from the sea. Previous studies have shown that lacustrine common smelt can be distinguished from diadromous populations by differences in counts of vertebrae and gill rakers, and otolith microchemistry. Horizons Regional Council requested that an analysis of smelt otoliths and relevant morphological characteristics be performed to ascertain if the Lake Horowhenua population was diadromous.

text: Life-history of Lake Horowhenua common smelt: analysis of otolith chemistry and vertebral counts Lake Horowhenua is a coastal eutrophic lake on the west coast of the North Island. A recent survey of the lake found lower than expected fish diversity but comparatively abundant native fish populations, comprising mostly shortfin and longfin eels (Anguilla australis and A. dieffenbachii). A weir on the outlet of the lake was ifentified as a potential barrier to fish migrations, reducing fish diversity and abundance in the lake. However, large numbers of common smelt (Retropinna retropinna) were collected during this survey, indicating that the population was eighter successfully reproducing in the lake or diadromous, i.e., migrating from the sea. Previous studies have shown that lacustrine common smelt can be distinguished from diadromous populations by differences in counts of vertebrae and gill rakers, and otolith microchemistry. Horizons Regional Council requested that an analysis of smelt otoliths and relevant morphological characteristics be performed to ascertain if the Lake Horowhenua population was diadromous.

year: 2013

title: Accuracy bounds for ensembles under 0 - 1 loss.

authors: Bouckaert, Remco R.

abstract: This paper is an attempt to increase the understanding in the behavior of ensembles for discrete variables in a quantitative way.  A set of tight upper and lower bounds for the accuracy of an ensemble is presented for wide classes of ensemble algorithms, including bagging and boosting.  The ensemble accuracy is expressed in terms of the accuracies of the members of the ensemble. 
Since those bounds represent best and worst case behavior only, we study typical behavior as well, and discuss its properties.  A parameterised bound is presented which describes ensemble bahavior as a mixture of dependent base classifier and independent base classifier areas.  Some empirical results are presented to support our conclusions.

text: Accuracy bounds for ensembles under 0 - 1 loss. This paper is an attempt to increase the understanding in the behavior of ensembles for discrete variables in a quantitative way.  A set of tight upper and lower bounds for the accuracy of an ensemble is presented for wide classes of ensemble algorithms, including bagging and boosting.  The ensemble accuracy is expressed in terms of the accuracies of the members of the ensemble. 
Since those bounds represent best and worst case behavior only, we study typical behavior as well, and discuss its properties.  A parameterised bound is presented which describes ensemble bahavior as a mixture of dependent base classifier and independent base classifier areas.  Some empirical results are presented to support our conclusions.

year: 2002-06-01

title: Conscientisation and Resistance: Experiences from implementing a culturally responsive pedagogy of relations

authors: Lawrence, Dawn Cherie

subjects: culturally responsive pedagogy of relations

abstract: Consciousness of being part of a particular hegemonic force (that is to say,political consciousness) is the first stage towards a further progressive self –conscious in which theory and practice will finally be one. (Hoare & Smith,1971, p. 333)

Bishop, Berryman, Tiakiwai and Richardson, (2003) state that effective teachers of Māori students “positively and vehemently reject deficit theorizing as a means of explaining Māori students’ educational achievement” (p.95). This fundamental tenet of the Te Kotahitanga Effective Teaching Profile (ETP) moves beyond simply refraining from publicly articulating discourses that pathologise Māori students and their whānau (Bishop et al., 2003; Bishop & Berryman, 2006; Bishop, Berryman, Cavanagh, & Teddy. 2007). For many teachers it is a challenging, ongoing transformative process of critical self-reflection, which touches the very core of their own culture and identity.

This thesis contends that by working to discursively position themselves within a culturally responsive pedagogy of relations, teachers develop classroom practices that have been shown to positively affect outcomes for Māori students. It goes on to suggest that such discursive repositioning might be seen as praxis, with the potential to transform the inequities experienced by Māori within mainstream educational settings. With this understanding, the culture and leadership approach of the school context becomes a greater influence on teachers’ capacity to realize their agency within this pedagogy than any characteristic of the individual.

text: Conscientisation and Resistance: Experiences from implementing a culturally responsive pedagogy of relations Consciousness of being part of a particular hegemonic force (that is to say,political consciousness) is the first stage towards a further progressive self –conscious in which theory and practice will finally be one. (Hoare & Smith,1971, p. 333)

Bishop, Berryman, Tiakiwai and Richardson, (2003) state that effective teachers of Māori students “positively and vehemently reject deficit theorizing as a means of explaining Māori students’ educational achievement” (p.95). This fundamental tenet of the Te Kotahitanga Effective Teaching Profile (ETP) moves beyond simply refraining from publicly articulating discourses that pathologise Māori students and their whānau (Bishop et al., 2003; Bishop & Berryman, 2006; Bishop, Berryman, Cavanagh, & Teddy. 2007). For many teachers it is a challenging, ongoing transformative process of critical self-reflection, which touches the very core of their own culture and identity.

This thesis contends that by working to discursively position themselves within a culturally responsive pedagogy of relations, teachers develop classroom practices that have been shown to positively affect outcomes for Māori students. It goes on to suggest that such discursive repositioning might be seen as praxis, with the potential to transform the inequities experienced by Māori within mainstream educational settings. With this understanding, the culture and leadership approach of the school context becomes a greater influence on teachers’ capacity to realize their agency within this pedagogy than any characteristic of the individual.

year: 2014