An Investigation of the Effects of Correlation, Autocorrelation, and Sample Size in Classifier Fusion

This thesis extends the research found in Storm, Bauer, and Oxley, 2003. Data correlation effects and sample size effects on three classifier fusion techniques and one data fusion technique were investigated. Identification System Operating Characteristic Fusion (Haspert, 2000), the Receiver Operating Characteristic Within Fusion method (Oxley and Bauer, 2002), and a Probabilistic Neural Network were the three classifier fusion techniques; a Generalized Regression Neural Network was the data fusion technique. Correlation was injected into the data set both within a feature set (autocorrelation) and across feature sets for a variety of classification problems, and sample size was varied throughout. Total Probability of Misclassification (TPM) was calculated for some problems to show the effect of correlation on TPM. Feature selection was performed in some experiments to show the effects of selecting only certain features. Finally, experiments were designed and analyzed using analysis of variance to identify what factors had the most significant impact on fusion algorithm performance

A Confidence Paradigm for Classification Systems

There is no universally accepted methodology to determine how much confidence one should have in a classifier output. This research proposes a framework to determine the level of confidence in an indication from a classifier system where the output is or can be transformed into a posterior probability estimate. This is a theoretical framework that attempts to unite the viewpoints of the classification system developer (or engineer) and the classification system user (or war-fighter). The paradigm is based on the assumptions that the system confidence acts like, or can be modeled as a value and that indication confidence can be modeled as a function of the posterior probability estimates. The introduction of the non-declaration possibility induces the production of a higher-level value model that weighs the contribution of engineering confidence and associated non-declaration rate. Now, the task becomes to choose the appropriate threshold to maximize this overarching value function. This paradigm is developed in a setting considering only in-library problems, but it is applied to out-of-library problems as well. Introduction of out-of-library problems requires expansion of the overarching value model. This confidence measure is a direct link between traditional decision analysis techniques and traditional pattern recognition techniques. This methodology is applied to multiple data sets, and experimental results show the behavior that would be expected from a rational confidence paradigm

Roots Versus Wells: Grassroots Activism Against Fracking in New York and California

The reliance upon and depletion of fossil fuels as an energy source puts pressure on individuals, communities, energy companies, and policy-makers. Hydraulic fracturing – known colloquially as fracking – as a method of drilling for oil and natural gas temporarily alleviates this pressure since it allows for the extraction previously inaccessible fossil fuels in shale rock deposits deep beneath the Earth’s surface. This has resulted in a nationwide “fracking boom,” which has come with its share of economic benefits. However, the process of fracking can be detrimental to human and environmental health. In reaction to the increasing development of this practice, many communities across the country are mobilizing against fracking. This thesis will focus on the grassroots activism against fracking in New York, where fracking was banned in December 2014, and in California, which is largely slated as the next frontier for the expansion of fracking and thus battleground for the fight against fracking. Using grassroots academic literature, media coverage of fracking and activism in each state, and interviews from organizers working in each state, this thesis will examine the motivations, frameworks, strategies, and tactics used in each grassroots campaign in order to offer lessons in successes and opportunities for improvement within these anti-fracking efforts and others across the country

Students' perceptions of the follow-through experience in 3 year bachelor of midwifery programmes in Australia

Background: providing opportunities for students to participate in midwifery continuity of care experiences is a challenge in many midwifery education programmes. The 'follow-through experience' was a deliberate strategy introduced into midwifery education programmes in Australia to ensure that students experienced midwifery continuity of care. The follow through experience provides an opportunity for midwifery students to follow a pre-determined number of women through pregnancy, labour and birth and into the early parenting period. Aim: the aim of this study was to explore the follow-through experience in the 3 year Bachelor of Midwifery (direct entry) in Australia to better understand its impact on midwifery students and to identify the learning that is associated with this experience. Methods: a qualitative methodology was used. Data were collected from former and current Bachelor of Midwifery students through a survey and telephone interviews. Students from all 3-year pre-registration Bachelor of Midwifery programmes in Australia were invited to participate. A thematic analysis was undertaken. Constructivist learning theories were used to identify whether learning occurred in the context of the follow-through experience. Findings: students do learn from their engagement in midwifery continuity of care experiences. Learning was characterised by the primacy of the relationship with the women. Students also identified the challenges they faced which included recruitment of women and finding the time to fully engage with the follow-through experience. Difficulties were identified around the different requirements of the follow-through experience, the lack of support at times for students and the incongruence with the existing maternity system. These issues impacted on students' ability to engage in and maximise their learning. Conclusions: the follow-through experience is an innovative midwifery education strategy that facilitates learning for midwifery students. Challenges need to be addressed at a systematic level and new strategies developed to support the learning opportunities presented by the follow-through experience. © 2012 Elsevier Ltd

Midwifery continuity of carer in an area of high socio-economic disadvantage in London: A retrospective analysis of Albany Midwifery Practice outcomes using routine data (1997–2009)

© 2017 The Authors Objective in 1997, The Albany Midwifery Practice was established within King's College Hospital NHS Trust in a South East London area of high social disadvantage. The Albany midwives provided continuity of care to around 216 women per year, including those with obstetric, medical or social risk factors. In 2009, the Albany Midwifery Practice was closed in response to concerns about safety, amidst much publicity and controversy. The aim of this evaluation was to examine trends and outcomes for all mothers and babies who received care from the practice from 1997–2009. Design a retrospective, descriptive analysis of data routinely collected over the 12.5 year period was undertaken including changes over time and outcomes by demographic features. Setting and participants all women booked with the Albany Midwifery Practice were included. Findings of the 2568 women included over the 12.5 year period, more than half (57%) were from Black, Asian and Minority Ethnic (BAME) communities; one third were single and 11.4% reported being single and unsupported. Almost all women (95.5%) were cared for in labour by either their primary or secondary midwife. There were high rates of spontaneous onset of labour (80.5%), spontaneous vaginal birth (79.8%), homebirth (43.5%), initiation of breastfeeding (91.5%) and breastfeeding at 28 days (74.3% exclusively and 14.8% mixed feeding). Of the 79% of women who had a physiological third stage, 5.9% had a postpartum haemorrhage. The overall rate of caesarean section was 16%. The preterm birth rate was low (5%). Ninety-five per cent of babies had an Apgar score of 8 or greater at 5 minutes and 6% were admitted to a neonatal unit for more than two days. There were 15 perinatal deaths (perinatal mortality rate of 5.78 per 1000 births); two were associated with significant congenital abnormalities. There were no intrapartum intrauterine deaths. Key conclusions this analysis has shown that the Albany Midwifery Practice demonstrated positive outcomes for women and babies in socially disadvantaged and BAME groups, including those with complex pregnancies and perceived risk factors. Implications for practice consideration should be given to making similar models of care available to all women

Methodological insights from a study using video-ethnography to conduct interdisciplinary research in the study of birth unit design

© eContent Management Pty Ltd. Little is known about how the physical design of a birthing unit can influence the experiences of labour and birth for women, their supporters and midwives. We proposed that an interdisciplinary approach (disciplines of midwifery, architecture, design, communication and public health) was likely to be the most effective way to better understand the complexities and interactions of design, behaviour, communication and experiences. In this methodological paper we aim to provide a roadmap that other researchers may find helpful when considering the use of video as a data collection technique, especially in the study of the powerful and intimate setting of childbirth. The paper also outlines our process for engaging both researchers and participants in reviewing video footage with the aim to contribute multiple perspectives to the analysis process

The development of national competency standards for the midwife in Australia

Objective: to develop and validate national competency standards for midwives in Australia. This study was part of a commissioned national research project to articulate the scope of practice of Australian midwives and to develop national competency standards to assist midwives to deliver safe and competent midwifery care. Design: a multi-method, staged approach was used to collect data through a literature review, workshop consultations, interviews, surveys and written submissions in order to develop national competency standards for Australian midwives. Subsequently, direct observation of practice in a range of settings ensured validation of the competencies. Setting: maternity-care settings in each state and territory in Australia. Participants: midwives, other health professionals and consumers of midwifery care. Findings: The national competency standards for the midwife were developed through research and consultation before being validated in practice. Key conclusions: the national competency standards are currently being implemented into education, regulation and practice in Australia. These will be minimum competency standards required of all midwives who seek authority to practise as a midwife in Australia. It is expected that all midwives will demonstrate that they are able to meet the competency standards relevant to the position they hold. Implications for practice: the competency standards establish a national standard for midwives and reinforce responsibility and accountability in the provision of quality midwifery care through safe and effective practice. In addition, individual midwives may use the competency standards as the basis of their ongoing professional development plans. © 2006 Elsevier Ltd. All rights reserved

The relationship between birth unit design and safe, satisfying birth: Developing a hypothetical model

Recent advances in cross-disciplinary studies linking architecture and neuroscience have revealed that much of the built environment for health-care delivery may actually impair rather than improve health outcomes by disrupting effective communication and increasing patient and staff stress. This is also true for maternity care provision, where it is suggested that the design of the environment can also impact on the experiences and outcomes for birthing women.The aim of this paper is to describe the development of a conceptual model based on literature and understandings of design, communication, stress and model of care. The model explores potential relationships among a set of key variables that need to be considered by researchers wishing to determine the characteristics of optimal birth environments in relation to birth outcomes for women and infants. The conceptual model hypothesises that safe satisfying birth is reliant on the level of stress experienced by a woman and the staff around her, stress influences the quality of communication with women and between staff, and this process is mediated by the design of the birth unit and model of care.The conceptual model is offered as a starting point for researchers who have an appreciation of the complexity of birth and the ability to bring together colleagues from a range of disciplines to explore the pre-requisites for safe and effective maternity care in new ways. © 2010 Elsevier Ltd

The role of the midwife in Australia: views of women and midwives

Objective: to research the role of midwives in Australia from the perspectives of women and midwives. This study was part of a commissioned national research project to articulate the scope of practice of Australian midwives and to develop national competency standards to assist midwives to deliver safe and competent midwifery care. Design: a multi-method approach with qualitative data collected from surveys with women and interviews with midwives. Setting: participants represented each state and territory in Australia. Participants: midwives who were randomly selected by the regulatory authorities across the country and women who were consumers of midwifery care and involved in maternity activism. Key conclusions: midwives and women identified a series of key elements that were required of a midwife. These included: being woman centred; providing safe and supportive care; and working in collaboration with others when necessary. These findings were consistent with much of the international literature. Implications for practice: a number of barriers to achieving the full role of the midwife were identified. These included a lack of opportunity to practice across the full spectrum of maternity care, the invisibility of midwifery in regulation and practice, the domination of medicine, workforce shortages, the institutional system of maternity care, and the lack of a clear image of what midwifery is within the wider community. These barriers must be addressed if midwives in Australia are to be able to function according to the full potential of their role. © 2007

Autism Is Associated With Interindividual Variations of Gray and White Matter Morphology

BACKGROUND Although many studies have explored atypicalities in gray matter (GM) and white matter (WM) morphology of autism, most of them relied on unimodal analyses that did not benefit from the likelihood that different imaging modalities may reflect common neurobiology. We aimed to establish brain patterns of modalities that differentiate between individuals with and without autism and explore associations between these brain patterns and clinical measures in the autism group. METHODS We studied 183 individuals with autism and 157 nonautistic individuals (age range, 6-30 years) in a large, deeply phenotyped autism dataset (EU-AIMS LEAP [European Autism Interventions-A Multicentre Study for Developing New Medications Longitudinal European Autism Project]). Linked independent component analysis was used to link all participants' GM volume and WM diffusion tensor images, and group comparisons of modality shared variances were examined. Subsequently, we performed univariate and multivariate brain-behavior correlation analyses to separately explore the relationships between brain patterns and clinical profiles. RESULTS One multimodal pattern was significantly related to autism. This pattern was primarily associated with GM volume in bilateral insula and frontal, precentral and postcentral, cingulate, and caudate areas and co-occurred with altered WM features in the superior longitudinal fasciculus. The brain-behavior correlation analyses showed a significant multivariate association primarily between brain patterns that involved variation of WM and symptoms of restricted and repetitive behavior in the autism group. CONCLUSIONS Our findings demonstrate the assets of integrated analyses of GM and WM alterations to study the brain mechanisms that underpin autism and show that the complex clinical autism phenotype can be interpreted by brain covariation patterns that are spread across the brain involving both cortical and subcortical areas