title: Sharp generalization error bounds for randomly-projected classifiers

authors: Durrant, Robert J.

subjects: Machine learning

abstract: We derive sharp bounds on the generalization error of a generic linear classifier trained by empirical risk minimization on randomly projected data. We make no restrictive assumptions (such as sparsity or separability) on the data: Instead we use the fact that, in a classification setting, the question of interest is really ‘what is the effect of random projection on the predicted class labels?’ and we therefore derive the exact probability of ‘label flipping’ under Gaussian random projection in order to quantify this effect precisely in our bounds .

text: Sharp generalization error bounds for randomly-projected classifiers We derive sharp bounds on the generalization error of a generic linear classifier trained by empirical risk minimization on randomly projected data. We make no restrictive assumptions (such as sparsity or separability) on the data: Instead we use the fact that, in a classification setting, the question of interest is really ‘what is the effect of random projection on the predicted class labels?’ and we therefore derive the exact probability of ‘label flipping’ under Gaussian random projection in order to quantify this effect precisely in our bounds .

year: 2013

title: Improving cervical screening rates among sexual minorities: Insights from Aotearoa New Zealand

authors: Ellis, Sonja J.

subjects: early detection of cancer

abstract: Issue Addressed: Sexual minority women (SMW) experience inequities in health outcomes. The extant literature consistently suggests that SMW are much less likely than their heterosexual peers to engage in cervical screening. Using participant's voices, the focus of this study was to explore the ways in which cervical screening rates for SMW might be improved. Methods: An online survey was completed by SMW (N = 177) aged 25–69 based in Aotearoa New Zealand and representing a range of sexual identities, ethnicities, and geographical regions. The analysis presented here was derived from open-ended qualitative responses to a single survey item: What do you think could be done to encourage more SMW (lesbians, wahine takatāpui, bisexual women, etc.) to engage in smear testing?. Results: Analysis of the data generated three main themes around how public health services could encourage more SMW to engage in cervical screening: Inclusive health services, clarity of information, and targeted health promotion. Conclusion: The analysis showed that the inherent heteronormativity among health care professionals and the lack of clear and consistent information specific to SMW may be key factors contributing to lower rates of engagement in screening. So What?: Given that not engaging in screening is the main risk factor for cervical cancer, it is imperative that active consideration is given to these issues with a view to increasing participation rates among SMW.

text: Improving cervical screening rates among sexual minorities: Insights from Aotearoa New Zealand Issue Addressed: Sexual minority women (SMW) experience inequities in health outcomes. The extant literature consistently suggests that SMW are much less likely than their heterosexual peers to engage in cervical screening. Using participant's voices, the focus of this study was to explore the ways in which cervical screening rates for SMW might be improved. Methods: An online survey was completed by SMW (N = 177) aged 25–69 based in Aotearoa New Zealand and representing a range of sexual identities, ethnicities, and geographical regions. The analysis presented here was derived from open-ended qualitative responses to a single survey item: What do you think could be done to encourage more SMW (lesbians, wahine takatāpui, bisexual women, etc.) to engage in smear testing?. Results: Analysis of the data generated three main themes around how public health services could encourage more SMW to engage in cervical screening: Inclusive health services, clarity of information, and targeted health promotion. Conclusion: The analysis showed that the inherent heteronormativity among health care professionals and the lack of clear and consistent information specific to SMW may be key factors contributing to lower rates of engagement in screening. So What?: Given that not engaging in screening is the main risk factor for cervical cancer, it is imperative that active consideration is given to these issues with a view to increasing participation rates among SMW.

year: 2024

title: Hauora and physical education in New Zealand: perspectives of Māori and Pasifika

authors: Fitzpatrick, Katie

subjects: physical education

abstract: Discussion surrounding the concept of Hauora (Durie, 1994) in the document Health and Physical Education in the New Zealand Curriculum (Ministry of Education, 1999) has been controversial. Some writers have praised or justified its inclusion (Culpan, 1996/1997; Tasker, 1996/1997; Tinning, MacDonald, Wright & Hickey, 2001), while others accuse the writers of tokenism and misappropriation of indigenous knowledge (Hokowhitu, 2004; Salter, 2000). While existing at a political level, these debates have generally ignored student responses to and interactions with Hauora. Thus, this article intervenes in the existing debate and makes the case for the inclusion of student perspectives. My claims are made on the basis of a study into the perspectives of Māori and Pasifika students of physical education in New Zealand. The experiences of these students are related to the theory of hybridity (Besley, 2002; Bhabha, 1994), which suggests that young people actively negotiate and make critical decisions about what they think is relevant to them. I argue that the debate surrounding the concept of Hauora needs to include students' perspectives and consideration of the agency of young people in interactions with curriculum concepts.

text: Hauora and physical education in New Zealand: perspectives of Māori and Pasifika Discussion surrounding the concept of Hauora (Durie, 1994) in the document Health and Physical Education in the New Zealand Curriculum (Ministry of Education, 1999) has been controversial. Some writers have praised or justified its inclusion (Culpan, 1996/1997; Tasker, 1996/1997; Tinning, MacDonald, Wright & Hickey, 2001), while others accuse the writers of tokenism and misappropriation of indigenous knowledge (Hokowhitu, 2004; Salter, 2000). While existing at a political level, these debates have generally ignored student responses to and interactions with Hauora. Thus, this article intervenes in the existing debate and makes the case for the inclusion of student perspectives. My claims are made on the basis of a study into the perspectives of Māori and Pasifika students of physical education in New Zealand. The experiences of these students are related to the theory of hybridity (Besley, 2002; Bhabha, 1994), which suggests that young people actively negotiate and make critical decisions about what they think is relevant to them. I argue that the debate surrounding the concept of Hauora needs to include students' perspectives and consideration of the agency of young people in interactions with curriculum concepts.

year: 2005