650 results on '"Stephen, Peter"'
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2. Depositional and post-depositional architectural elements of the Dar es Salaam Platform, central coastal Tanzania: distribution of petroleum system elements and their implications for petroleum prospectivity
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Nyaki, Felister Christopher, Kiswaka, Emily Barnabas, Boboye, Olugbenga A., Magohe, Stephen Peter, Mshiu, Elisante E., and Mtelela, Cassy
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- 2024
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3. AMONuSeg: A Histological Dataset for African Multi-organ Nuclei Semantic Segmentation.
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Hasnae Zerouaoui, Gbenga Peter Oderinde, Rida Lefdali, Karima Echihabi, Stephen Peter Akpulu, Nosereme Abel Agbon, Abraham Sunday Musa, Yousef Yeganeh, Azade Farshad, and Nassir Navab
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- 2024
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4. AMONuSeg: A Histological Dataset for African Multi-organ Nuclei Semantic Segmentation
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Zerouaoui, Hasnae, Oderinde, Gbenga Peter, Lefdali, Rida, Echihabi, Karima, Akpulu, Stephen Peter, Agbon, Nosereme Abel, Musa, Abraham Sunday, Yeganeh, Yousef, Farshad, Azade, Navab, Nassir, Goos, Gerhard, Series Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Linguraru, Marius George, editor, Dou, Qi, editor, Feragen, Aasa, editor, Giannarou, Stamatia, editor, Glocker, Ben, editor, Lekadir, Karim, editor, and Schnabel, Julia A., editor
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- 2024
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5. Nietzsche contra the atheists : an analysis of the popular reception of Nietzsche's atheism in English-speaking countries
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Cheung, Stephen Peter
- Abstract
This analysis of the English-speaking popular reception of Nietzsche from 1895 to the present will follow Nietzsche in bringing history and philosophy together. I will argue that Nietzsche's philosophy provides explanatory power for understanding the reception of his atheism and that his reception history in turn sheds light on the meaning of his atheism. Chapter One explores how Nietzsche employs form and style to establish the event of God's death as the chasm of understanding that lies between himself and other atheists. Chapter Two considers the defining features and concerns of Nietzsche's atheism - nihilism, Dionysianism, asceticism, naturalism, eternal recurrence and the übermensch - in the context of Nietzsche's soteriological project. Against this backdrop, the remaining chapters will explore the reception of Nietzsche's atheism that has not been conveyed to a popular audience through the details of his philosophy but rather through the themes and categories that naturally arose between the established poles of debate of the broader culture of the time. Chapters 3-5 demonstrate how Nietzsche's popular reception has been shaped through debates over Nietzsche's alleged madness, nationalism, social Darwinism, decadence, warmongering and nazism, while chapter 6 explores why most authors attempting to popularise atheism today either make little mention of Nietzsche or conspicuously do not mention him at all. The question throughout this account of Nietzsche's reception is not simply 'How has Nietzsche been received?' but rather 'What would Nietzsche make of his own popular reception?' A Nietzschean evaluation of his own reception history is made feasible by Nietzsche himself who not only predicts that he and the majority of atheists who read him will remain at a vast distance from each other, but having measured the distance that lies between them, he also takes the trouble to explain why that distance exists.
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- 2022
6. 'In search of the borderline male' : counselling psychologists' talk about male clients with a BPD diagnosis
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Young, Stephen Peter, Mason, Oliver, and Frith, Hannah L.
- Abstract
Topic: Borderline Personality Disorder (BPD) is a highly contentious and controversial mental health diagnosis. Often characterised as the quintessential personality disorder, it is widely described as being diagnosed much more often in women than in men. Clinical and research samples often reflect this, yet community prevalence studies do not support any such gendered prevalence disparity. Various attempts have been made to explain how either BPD or its application might be gendered, but none have made provided a compelling explanation for the disparity, and few have explored the issue discursively. Method: Semi-structured interviews were carried out with UK Counselling Psychologists who had experience of working with men with a BPD diagnosis. Transcripts were subjected to a form of critical discourse analysis, to create a reading of accounts that might answer research questions on participants' understanding of the BPD male, including differences from and similarities with the BPD female, as well as their understanding of the gender disparity around this diagnosis and presentation. Findings: Participants' accounts were found to draw on four discrete interpretative repertoires, covering psychiatric, psychological, psychotherapeutic, and societal realms, which produced varying and conflicting conceptions of 'the BPD male'. Contradictions produced by these repertoires led to the identification of dilemmas. and the ways participants made discursive sense of these was analysed. Men who might meet BPD diagnostic criteria were variously constructed as no different from women meeting the criteria, yet also fundamentally 'othered' within all but one discursive realm. Issues around diagnostic practice and feminised psychological services were identified. Conclusions: The BPD gender disparity can be understood by conceptualising it not as a product of psychological difference between men and women, but as resulting from systemically, institutionally, and culturally situated diagnostic and psychotherapeutic practices, influenced by hegemonic constructions of gender. Consequently, gender-informed diagnosis and services are suggested.
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- 2021
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7. Assessing the impact of COVID-19 at 1-year using the SF-12 questionnaire: Data from the Anticipate longitudinal cohort study
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Brendan O'Kelly, Louise Vidal, Gordana Avramovic, John Broughan, Stephen Peter Connolly, Aoife G Cotter, Walter Cullen, Shannon Glaspy, Tina McHugh, James Woo, and John S. Lambert
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SARS-CoV-2 ,COVID-19 ,Post–COVID-19 Syndrome ,SF-12 ,long COVID ,Infectious and parasitic diseases ,RC109-216 - Abstract
Background: Few studies to date have explored the health-related quality of life (HRQoL) in patients with long COVID. Methods: The Anticipate Study is a prospective single-centre observational cohort study. Hospitalised and nonhospitalised patients were seen at a dedicated post-COVID clinic at a 2-4 month (Timepoint 1) and 7-14 month follow-up (Timepoint 2). The main objectives of this study are to assess the longitudinal impact of COVID-19 in patients using the 12-item Short Form Survey (SF-12) score, a health-related quality of life tool, and to identify predictors of developing post–COVID-19 syndrome (PoCS). In addition, we aimed to describe symptomatology and identify predictors of PoCS at 1-year. Results: A total of 155 patients were enrolled, 105 (68%) were female aged 43.3 (31-52) years. In total 149 (96%) and 94 (61%) patients completed follow-up at median 96 (76-118) days and 364 (303-398) days. The overall cohort had significantly reduced physical composite score (PCS) of the SF-12 (45.39 [10.58] vs 50 [10], p = 0.02). Participants with PoCS had significantly lower scores than those without symptoms at 1-year follow-up (37.2 [10.4] v 46.1 [10.9] p
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- 2022
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8. Assessing the impact of COVID-19 at 1-year using the SF-12 questionnaire: Data from the Anticipate longitudinal cohort study
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O'Kelly, Brendan, Vidal, Louise, Avramovic, Gordana, Broughan, John, Connolly, Stephen Peter, Cotter, Aoife G, Cullen, Walter, Glaspy, Shannon, McHugh, Tina, Woo, James, and Lambert, John S.
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- 2022
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9. Carbonized sawdust based solar absorber in a solar still for seawater desalination.
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Karen, Wong Min Jin, Stephen, Peter Advent, Wang, Zhipeng, Chua, Bih Lii, Liew, Willey Y. H., and Melvin, G. J. H.
- Abstract
Current industrial technologies for seawater desalination involve high cost and energy consumption, that is, distillation and reverse osmosis, where these technologies are difficult to implement especially in developing countries. A cost‐effective, environmental‐friendly, and sustainable technology is essential in providing alternative methods for generation of clean water. Solar vapor generation is one of the potential green technologies in generating clean water, where the production and collection of clean water is made possible by using a solar absorber in a solar still. The practicality and performance of the carbonized sawdust based solar absorber in a solar still for the seawater desalination towards clean water generation was conducted outdoors with gradual enhancement on the solar still setup. The enhanced solar still with reflective surface and external thermal insulator improved the solar absorber performance, in contrast to the evaporation of the bulk seawater only and using solar absorber in the solar still without any enhancement. The average efficiency and evaporation rate of the solar absorber in the enhanced solar still was recorded at 61.5% and 0.98 kg m−2 h−1, respectively. The pH (7.52) and salinity (10 ppm) of the collected clean water meets the standard of safe water by the World Health Organization. [ABSTRACT FROM AUTHOR]
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- 2024
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10. Sustainability Survey to Assess Student Perspectives
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Speer, James Hardy, Sheets, Virgil, Kruger, Tina M., Aldrich, Stephen Peter, and McCreary, Nicholas
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Purpose: The purpose of this study is to assess environmental concern at a Midwest university, analyze trends in concern over time and determine the effect of the development of a campus sustainability office. Design/methodology/approach: A multi-question survey was administered through peer-to-peer recruitment from an undergraduate environmental science class each fall from 2010-2017. This exercise was originally developed as a pedagogical exercise on the scientific method. Findings: Over eight years, incoming freshmen have expressed more concern that humans are harming the environment and students also express greater concern as they progress through college. Research limitations/implications: The first year of the survey (2010) and the year that the lead PI was on sabbatical (2014) saw reduced response rates ([tilde]1%-3% of the student population) compared to 6%-9% of the student population in other years. Practical implications: Responses to all of the questions in the survey provide guidance for university administrations and sustainability offices about the concerns of the campus community, awareness about campus efforts and support for sustainability activities on campus. Originality/value: Few studies have been published on students' perspectives on environmental concern and sustainability activities on university campuses. These data provide an overview of environmental concern, perceived government action and empowerment to action over an eight-year period. This approach is recommended as a technique to teach the scientific method in introductory classes and as a means to collect data about student perspectives on sustainability.
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- 2020
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11. Students with Autism Spectrum Disorders at a Hispanic Serving Institution: A Qualitative Case Study of Students' Experiences
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Stephen Peter Loynaz
- Abstract
The present study focuses on the experiences of students with Autism Spectrum Disorder (ASD) in higher education. It was important to conduct this study because of the rising numbers of students with ASD in higher education and the scant amount of research available about how to best serve them depending on their actual needs, not the perceived needs stated by experts based on research from K-12 student populations, or the perceived needs of these students stated by their parents or other service providers or faculty. Semi-structured interviews were conducted with nine students from a Hispanic-serving institution in the Southeast United States of America. The data gleaned from these interviews using holistic coding and the constant comparative method were used to create a case study of a resilient group of students that understand their needs in higher education, are interested in becoming more engaged with on-campus activities, and know what needs to be done to attend to these needs. They are a group of students who have goals of their own, despite what their loved ones and service providers may have to say, and they are utilizing the option available in higher education to live in student housing as a way of sharpening their life skills so they may be better prepared to live independently after graduation. The results of the study are followed by a discussion of how this information can be used in practice and what other research can be conducted to further these findings and better understand this student population. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]
- Published
- 2020
12. Realizing the Biotechnological Potential of Fungal Cellulosomes
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Lillington, Stephen Peter
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Chemical engineering ,Bioengineering ,anaerobic fungi ,cellulosome ,nanobody ,protein engineering ,yeast surface display - Abstract
Rising risks of climate change and supply chain insecurity highlight the need to develop alternative, greener synthesis routes to common materials currently sourced from petroleum. Biological systems excel at interconverting chemicals with exquisite specificity and speed, using networks of enzymes that perform catalysis at mild conditions. Protein complexes in nature colocalize complementary subunits to perform sophisticated biochemistry, and artificial, spatial organization of enzyme systems into synthetic complexes is an attractive strategy for improving biocatalytic process throughputs in industrial settings. While some sets of modular parts that enable designer protein complex construction exist, there is still a need to develop new components that are widely compatible with different enzymes and that are highly engineerable to impart desired self-assembly properties. Fungal cellulosomes, modular protein machines produced by anaerobic fungi in the guts of herbivores to rapidly free sugars from plant matter, represent an unexplored framework for synthetic protein complex construction. Cellulosomes synergistically incorporate enzymes involved in biomass degradation into discrete complexes via modular protein-protein interactions between enzyme fused dockerin domains and cohesin domains repeated on a central scaffoldin protein. Over 80% of the degradative power anaerobic fungi possess is attributed to cellulosomes, but the mechanistic nature of their activity and their assembly mechanism remain unknown. These knowledge gaps have precluded the development of fungal cellulosomes or their parts as biocatalytic technologies with real world applications.We apply a range of experimental techniques towards addressing how cellulosomes are produced in native anaerobic fungal cultures and characterizing the composition, nanostructure, and biochemical activity of purified, native cellulosomes. Immunofluorescence microscopy with cellulosome-labeling antibodies shows cellulosomes localize to the surfaces of cells, but that only cells at certain stages of the multi-staged life cycle produce cellulosomes under specific growth conditions. A robust cellulosome purification method we developed, in conjunction with mass spectrometry-based proteomics and biomass hydrolysis kinetic assays, provides high resolution details into the composition and lignocellulolytic activities of isolated cellulosomes produced by an anaerobic fungus, advancing our understanding of how cellulosomes can be engineered to enhance biomass hydrolysis rates.Towards leveraging the modular cellulosome assembly framework for synthetic biology applications, we develop a suite of modular interacting parts for constructing protein complexes with fungal cellulosome proteins. Through a combination of molecular modeling and high-throughput screening, we engineer interacting domains with a range of pH dependent binding behaviors for building protein complexes whose composition and therefore function are modulated with and environmental trigger, pH. Together, these tools and insights shed light on how cellulosomes make anaerobic fungi prolific biomass degraders and provide a framework for engineering protein complexes inspired by fungal cellulosomes designed for a wide range of applications.
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- 2023
13. Practice-led research into music : a synergetic trifecta of glissandi, microtonality, and isorhythms
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Bryant, Stephen Peter
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787.87 ,W300 - Music - Abstract
The contribution to knowledge, and the core of the research, is a tonal foundation based on glissandi using compositional techniques derived from synergy of glissandi, microtonality, and isorhythm. The techniques are performed on specially constructed guitars in 18, 24, 30, and 36 tet (tone equal temperament). Guitar based musical artefacts demonstrating some possible techniques are arranged on two compact discs: CD1 ‘Experimental Miniatures’ and CD2 ‘After Twelve’.
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- 2016
14. Integrating inflammatory serum biomarkers into a risk calculator for prostate cancer detection
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Amirhossein Jalali, Michael Kitching, Kenneth Martin, Ciaran Richardson, Thomas Brendan Murphy, Stephen Peter FitzGerald, Ronald William Watson, and Antoinette Sabrina Perry
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Medicine ,Science - Abstract
Abstract Improved prostate cancer detection methods would avoid over-diagnosis of clinically indolent disease informing appropriate treatment decisions. The aims of this study were to investigate the role of a panel of Inflammation biomarkers to inform the need for a biopsy to diagnose prostate cancer. Peripheral blood serum obtained from 436 men undergoing transrectal ultrasound guided biopsy were assessed for a panel of 18 inflammatory serum biomarkers in addition to Total and Free Prostate Specific Antigen (PSA). This panel was integrated into a previously developed Irish clinical risk calculator (IPRC) for the detection of prostate cancer and high-grade prostate cancer (Gleason Score ≥ 7). Using logistic regression and multinomial regression methods, two models (Logst-RC and Multi-RC) were developed considering linear and nonlinear effects of the panel in conjunction with clinical and demographic parameters for determination of the two endpoints. Both models significantly improved the predictive ability of the clinical model for detection of prostate cancer (from 0.656 to 0.731 for Logst-RC and 0.713 for Multi-RC) and high-grade prostate cancer (from 0.716 to 0.785 for Logst-RC and 0.767 for Multi-RC) and demonstrated higher clinical net benefit. This improved discriminatory power and clinical utility may allow for individualised risk stratification improving clinical decision making.
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- 2021
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15. Incompleteness and misclassification of maternal deaths in Zimbabwe: data from two reproductive age mortality surveys, 2007-08 and 2018-19
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Musarandega, Reuben, primary, Nystrom, Lennarth, additional, Murewanhema, Grant, additional, Gwanzura, Chipo, additional, Ngwenya, Solwayo, additional, Pattinson, Robert, additional, Machekano, Rhoderick, additional, and Munjanja, Stephen Peter, additional
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- 2024
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16. 8. Strategies for Managing Uncertainty
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Stephen Peter Rosen
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- 2018
17. 9. Conclusion: Lessons Learned
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Stephen Peter Rosen
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- 2018
18. Index
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Stephen Peter Rosen
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- 2018
19. 3. Making Things Happen: The Politics of Peacetime Innovation
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Stephen Peter Rosen
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- 2018
20. 6. The United States Strategic Bombing Force, 1941-1945
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Stephen Peter Rosen
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- 2018
21. 4. The British Army and the Tank, 1914-1918
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Stephen Peter Rosen
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- 2018
22. Contents
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Stephen Peter Rosen
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- 2018
23. 7. What Is the Enemy Building?
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Stephen Peter Rosen
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- 2018
24. Technological Innovation
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Stephen Peter Rosen
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- 2018
25. 2. The Shape of Wars to Come: Analyzing the Need for Peacetime Innovation
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Stephen Peter Rosen
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- 2018
26. 5. New Blood for the Submarine Force
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Stephen Peter Rosen
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- 2018
27. Acknowledgments
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Stephen Peter Rosen
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- 2018
28. Wartime Innovation
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Stephen Peter Rosen
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- 2018
29. 1. Thinking about Military Innovation
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Stephen Peter Rosen
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- 2018
30. Peacetime Innovation
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Stephen Peter Rosen
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- 2018
31. Title and Copyright
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Stephen Peter Rosen
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- 2018
32. Robert Wilmot Horton and Liberal Toryism
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Lamont, Stephen Peter
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941.07 ,DA Great Britain - Abstract
This thesis examines aspects of the political career of Robert Wilmot Horton (1784-1841), a junior minister in the Tory governments of the 1820s and an advocate of state-aided emigration to the British colonies. It considers how far Wilmot conforms to existing conceptualisations of 'liberal Toryism', which are summarized in Chapter 1. Chapter 2 finds both ambition and principle in Wilmot's choice of party, while identifying fundamental aspects of his political make-up, in particular his devotion to political economy and his hostility to political radicalism. Chapters 3 to 5 explore his economic thinking. Chapter 3 charts Wilmot's gradual move away from a Malthusian approach to the problem of pauperism, and the resulting changes in his view of the role of emigration as a means of relief. Chapter 4 shows how his specific plan of colonization addressed broader considerations of imperial strategy and economic development. Chapter 5, exploring the wider context of economic debate, reveals Wilmot as an advocate of governmental activism in social policy, a critic of 'economical reform', and a moderate protectionist in the short term. Chapter 6 suggests that Wilmot, and the ministry as a whole, were driven by pragmatic rather than ideological considerations in their approach to the amelioration of slavery. Chapter 7 concludes that Wilmot's advocacy of Catholic Emancipation, on grounds of expediency, conformed to the approach normally ascribed to liberal Tories in principle if not in detail. Chapter 8 finds, in Wilmot's pamphleteering and lecturing, a striking instance of an 'outward turn' in political behaviour; and, in his support for parliamentary reform in 1831, a continuing determination to resist political radicalism. Overall, the thesis argues that Wilmot embraced political economy more in its 'secular' than its 'Christian' guise, but took interventionist positions on economic and social questions which set him apart from his colleagues. These conclusions complicate the task of retrieving a convincing ideology of liberal Toryism, if indeed there is one to be found.
- Published
- 2015
33. Integrating inflammatory serum biomarkers into a risk calculator for prostate cancer detection
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Jalali, Amirhossein, Kitching, Michael, Martin, Kenneth, Richardson, Ciaran, Murphy, Thomas Brendan, FitzGerald, Stephen Peter, Watson, Ronald William, and Perry, Antoinette Sabrina
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- 2021
- Full Text
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34. 2. Competitive Strategies: Theoretical Foundations, Limits, and Extensions
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Rosen, Stephen Peter, primary
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- 2020
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35. Novel routes to kainoids : the total synthesis of (-)-α-kainic acid
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Rushton, Stephen Peter Garnett
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540 ,QP0501 Animal biochemistry - Abstract
This thesis contains three chapters concerning synthetic studies towards the alkaloids (-)-α-kainic acid; a natural product isolated from the Japanese marine algae Kainin-sou (海人草) or Digenea simplex and the close family member (-)-domoic acid isolated from another Japanese marine algae Doumoi or Chondria armata. Chapter one gives an introduction to the isolation, structure and biological activity of kainic acid, domoic acid and their analogues. Chapter one also contains a discussion of the previous syntheses of both kainic acid, domoic acid and domoic acid C. It is written with the aim of selecting key aspects of each synthesis and in turn gives a critical account of each piece of work. Chapter two is concerned with the results obtained from the experimental section of this thesis. Disclosed is a novel method for the construction of (-)-α-kainic acid via an ene-reaction on a 1,6-diene intermediate. The synthesis comprises of eight linear steps from readily available D-serine and through the use of simple methodology forms the target compound kainic acid in a satisfactory overall yield of 20 %. This thesis also investigates the possibility of installing a variety of side chains to the biologically active kainoid core via a cross-metathesis reaction on an unsaturated carbon appendage. Chapter three contains the experimental procedures carried out for the synthesis of the compounds discussed in chapter two.
- Published
- 2013
36. Quasitoric functors and final spaces
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Miller, Stephen Peter, Ray, Nige, and Grbic, Jelena
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514 ,Quasitoric ,Toric ,Topology - Abstract
We introduce open quasitoric manifolds and their functorial properties, including complex bundle maps of their stable tangent bundles, and relate these new spaces to the standard constructions of toric topology: quasitoric manifolds, moment angle manifolds and polyhedral products. We extend the domain of these constructions to countably infinite simplicial complexes, clarifying and generalising constructions of Davis and Januszkiewicz. In particular we describe final spaces in the categories of open quasitoric manifolds and quasitoric spaces, as well as in the categories of characteristic pairs and dicharacteristic pairs. We show how quasitoric manifolds can be constructed smoothly as pullbacks of the final spaces QT(n) for n >= 1, and how stably complex structure also arises this way. We calculate the integral cohomology of quasitoric spaces over Cohen-Macaulay simplicial complexes, including the final spaces QT(n) as a special case. We describe a procedure for calculating the Chern numbers of a quasitoric manifold M and, relating this to our cohomology calculations, show how it may be interpreted in terms of the simplicial homology of H(n), the simplicial complex underlying QT(n).
- Published
- 2012
37. Impact of Covid-19 pandemic on obstetric fistula repair program in Zimbabwe.
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Chipo Chimamise, Stephen Peter Munjanja, Mazvita Machinga, and Iris Shiripinda
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Medicine ,Science - Abstract
The advent of Covid-19 pandemic adversely affected many programs worldwide, public health, including programming for obstetric fistula were not spared. Obstetric fistula is an abnormal connection between the vagina and the bladder or the rectum resulting from obstetric causes, mainly prolonged obstructed labour. Zimbabwe has two obstetric fistula repair centers. Because the program uses specialist surgeons from outside the country, the repairs are organized in quarterly camps with a target to repair 90 women per quarter. This study aimed at assessing the impact of restrictions on movement and gathering of people brought about by the Cocid-19 pandemic and to characterize participants of the camp which was held in the midst of the Covid-19 pandemic at Mashoko Hospital. Specifically it looked at how Covid-19 pandemic affected programming for obstetric fistula repair and characterized participants of the fistula camp held in November to December 2020 at one of the repair centers. A review of the dataset and surgical log sheets for the camp and national obstetric fistula dataset was conducted. Variables of interest were extracted onto an excel spreadsheet and analyzed for frequencies and proportions. Data were presented in charts, tables and narratives. The study noted that Covid-19 pandemic negatively affected performance of fistula repairs greatly with only 25 women repaired in 2020 as compared to 313 in 2019. Ninety women were called to come for repairs but 52 did not manage to attend due to reasons related to the restriction of the Covid-19 pandemic lockdown. Two thirds of those women suffered from urinary incontinence while the other third had fecal incontinence. The successful repair rate was 92%. This study concluded that the pandemic greatly affected programming of fistula repair in the country and recommended the Ministry of Health and Child Care to institute measures to resume programming as soon as the situation allows.
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- 2021
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38. Protocol for analysing the epidemiology of maternal mortality in Zimbabwe: A civil registration and vital statistics trend study.
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Reuben Musarandega, Rhoderick Machekano, Robert Pattinson, Stephen Peter Munjanja, and Zimbabwe Maternal and Perinatal Mortality Study (ZMPMS) group
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Medicine ,Science - Abstract
BackgroundSub-Saharan Africa (SSA) carries the highest burden of maternal mortality, yet, the accurate maternal mortality ratios (MMR) are uncertain in most SSA countries. Measuring maternal mortality is challenging in this region, where civil registration and vital statistics (CRVS) systems are weak or non-existent. We describe a protocol designed to explore the use of CRVS to monitor maternal mortality in Zimbabwe-an SSA country.MethodsIn this study, we will collect deliveries and maternal death data from CRVS (government death registration records) and health facilities for 2007-2008 and 2018-2019 to compare MMRs and causes of death. We will code the causes of death using classifications in the maternal mortality version of the 10th revision to the international classification of diseases. We will compare the proportions of maternal deaths attributed to different causes between the two study periods. We will also analyse missingness and misclassification of maternal deaths in CRVS to assess the validity of their use to measure maternal mortality in Zimbabwe.DiscussionThis study will determine changes in MMR and causes of maternal mortality in Zimbabwe over a decade. It will show whether HIV, which was at its peak in 2007-2008, remains a significant cause of maternal deaths in Zimbabwe. The study will recommend measures to improve the quality of CRVS data for future use to monitor maternal mortality in Zimbabwe and other SSA countries of similar characteristics.
- Published
- 2021
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39. Imaging of luminescent nanoparticles in flows : development of surface active luminescent lanthanide complexes
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Hammond, Stephen Peter
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540 ,QD Chemistry - Abstract
We have developed a new ligand (H\(_3\)L\(^2\)) based on a DTPA bis-amide backbone which improves upon previous work within the group. The quantum yields of the europium and samarium complexes of H\(_3\)L\(^2\) are greatly enhanced over that of H\(_3\)L\(^1\). The previously observed nanoparticle-based quenching of the lanthanide luminescence lifetime of EuL\(^1\) is suppressed in EuL\(^2\). We have demonstrated the functionalisation of gold and platinum nanoparticles of various sizes with the surface active lanthanide complexes of H\(_3\)L\(^1\) and H\(_3\)L\(^2\). As a proof of principle, we have imaged, tracked and measured velocities of individual EuL\(^2\) functionalised nanoparticles in an aqueous flow, providing flow-rates accurate to micrometer resolution of fluids through a 2 mm diameter tube. We have also observed the microscale mixing of a nanoparticle labelled solution with water on time-scales of milliseconds to seconds. We can study the development and measure the dimensions of features present during mixing and therefore assess the efficiency of that mixing. We have also visualised a turn-on event at the boundary of aqueous solutions of Eu(III) ions and H\(_3\)L\(^2\)-functionalised nanoparticles during mixing, demonstrating a novel optical method for ascertaining the degree of mixing between two solutions and the position and area of that mixing.
- Published
- 2009
40. Physical chemical processes and environmental impacts associated with home composting
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McKinley, Stephen Peter and Williams, Ian
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628 ,TD Environmental technology. Sanitary engineering ,QD Chemistry - Abstract
This thesis reports on experimental and modelling work carried out in order to make quantitative estimates on the environmental impacts of home composting. The focus of the work was climate relevant gaseous emissions, and developing and utilising a methodology for quantifying them. Experiments using 220L open bottomed home compost bins, alongside purpose built 200L composting reactors with airflow control were performed. A variety of composting conditions were tested, using different compositions of garden and kitchen wastes. The experiments were monitored for headspace gas composition, including CO2, O2, NH3, N2O, CH4 and volatile organic compounds, as well as temperature, humidity, moisture and solids losses and pH. From the CO2 emission rates calculated from the reactor experiments, theoretical analysis and modelling and airflow pathway tests on home compost bins, it was concluded that molecular diffusion, rather than bulk convective flow, is the dominant gas transfer mechanism from home compost bins. There were no detected emissions of N2O but emissions of NH3 up to 16 g/T feed. Only a few cases of CH4 emission were detected, typically in the first 2-3 days following a feed addition, with the highest single concentration measured at 86 ppm within the headspace. The total anthropogenic greenhouse gas emissions from home composting were estimated as between 3 and 12 Kg CO2E/Tw with almost 90% coming from the lifecycle of the compost bin. This compares with between 20 and 56 Kg CO2E/Tw from centralised facilities, at least more than double that for home composting. Total anthropogenic CO2-equivalent emissions from home composting in the UK in 2008 were estimated to be in the region of 7 thousand tonnes CO2E.
- Published
- 2008
41. Design and evaluation of mRNA accessible siRNA to silence the epidermal growth factor receptor (EGFR)
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Fox, Stephen Peter
- Subjects
572.8 - Abstract
Small interfering RNA siRNA promise to be highly effective molecules but susceptible to some of the limitations experienced with antisense oligonucleotide ASO technology biological instability, design of target mRNA accessible sequences and efficient delivery to subcellular sites of action. This thesis has aim to address each of these limitations for siRNA. The biological stability of 5'-end 32P radiolabeled siRNA and ASO were tested in FBS, FBS-containing cell culture media and in A431 cell lysates. The biological degradation profiles of ASO and siRNA in serum were comparable ASO t1/2 19 minutes and siRNA t1/2 19 minutes. The stability of siRNA was higher than ASO in A431 cell lysates ASO tU2 37 minutes and siRNA t1/2 43 minutes. siRNA were designed using innovative scanning ASO array technologies to EGFR mRNA accessible sites. Initially seven siRNAs were designed against different mRNA accessible sites. Based on above a further five siRNAs were designed incorporating termini modifications to alter the thermodynamic stability of the siRNA duplex. These sequences were evaluated for biological activity following optimisation of a delivery strategy. siRNA delivery to A431 cells was optimised using a FACs assay with Oligofectamine and fluorescendy labelled siRNA. Oligofectamine delivery showed significant cell fluorescence associated with labelled siRNA compared with untreated controls P 0.05. The activity, cell proliferation and EGFR protein and mRNA knockdown, of the designed siRNA was investigated in A431 and TamR cells. RT-PCR, Western blot and immunofluorescent microscopy showed inhibitory trends, but ultimately lacked sufficient resolution and reproducibility A431 growth was not inhibited. A proprietary siRNA showed knockdown of EGFR mRNA in TamR cells, but all the custom designed siRNA produced highly variable effects, failing to show significant knockdown, even when various designed siRNA were pooled. ASO and siRNA share common pharmaceutical developmental problems, although siRNAs can elicit the powerful innate RNAi mechanism. Further understanding of RNAi will allow siRNA to fulfill their enormous therapeutic potential.
- Published
- 2007
42. Assessment of quality of obstetric care in Zimbabwe using the standard primipara
- Author
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Bothwell Takaingofa Guzha, Thulani Lesley Magwali, Bismark Mateveke, Maxwell Chirehwa, George Nyandoro, and Stephen Peter Munjanja
- Subjects
Standard primipara ,Quality of care ,Obstetric process indicators ,Obstetric outcome indicators, the perinatal mortality rate ,Gynecology and obstetrics ,RG1-991 - Abstract
Abstract Background To improve maternity services in any country, there is need to monitor the quality of obstetric care. There is usually disparity of obstetric care and outcomes in most countries among women giving birth in different obstetric units. However, comparing the quality of obstetric care is difficult because of heterogeneous population characteristics and the difference in prevalence of complications. The concept of the standard primipara was introduced as a tool to control for these various confounding factors. This concept was used to compare the quality of obstetric care among districts in different geographical locations in Zimbabwe. Methods This was a substudy of the Zimbabwe Maternal and Perinatal Mortality Study. In the main study, cluster sampling was done with the provinces as clusters and 11 districts were randomly selected with one from each of the nine provinces and two from the largest province. This database was used to identify the standard primipara defined as; a woman in her first pregnancy without any known complications who has spontaneous onset of labour at term. Obstetric process and outcome indicators of the standard primipara were then used to compare the quality of care between rural and urban, across rural and across urban districts of Zimbabwe. Results A total of 45,240 births were recruited in the main study and 10,947 women met the definition of standard primipara. The maternal mortality ratio (MMR) and the perinatal mortality rate (PNMR) for the standard primiparae were 92/100000 live births and 15.4/1000 total births respectively. Compared to urban districts, the PNMR was higher in the rural districts (11/1000 total births vs 19/ 1000 total births, p
- Published
- 2018
- Full Text
- View/download PDF
43. Applications of robust optimal control to decision making in the presence of uncertainty
- Author
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Weston, Stephen Peter
- Subjects
332.0684 ,HB Economic Theory - Abstract
This thesis is concerned with robustness of decision making in financial economics. Feedback control models developed in engineering are applied to three separate though linked problems in order to examine the role and impact of robustness in the creation and application of decision rules. Three problems are examined using robust optimal control techniques to evaluate the impact of robustness and stability in financial economic models. The first problem examines the use of linear models of robust optimal control in the pricing of castastrophe based derivatives and finds its relative performance to be superior to the popular jump diffusion and stochastic volatility models in the pricing of these emerging instruments. The novelty of the approach arises from the examination of the impact of robustness and stability of the pricing solution. The second problem involves robustness and stability of hedging. An alternative method of creating hedging rules is developed. The method is based on robust control Lyapunov functions that are simple, robust and stable in operation, yet in practice are not so conservative that they eliminate all trading gains. The third problem involves the development of robust control policies for managing risk, using non-linear robust optimal control techniques to provide clear evidence of superior performance of robust models when compared with existing VAR and EVT approaches to risk management. The novelty in the approach arises from the development of a simple and powerful risk management metric.
- Published
- 2005
44. Near-infrared integral field spectroscopy with UIST
- Author
-
Todd, Stephen Peter
- Subjects
543.5 - Abstract
UIST is a facility class near-infrared imager and spectrometer, built at the UK Astronomy Technology Centre (UKATC) in Edinburgh, and now in use at the UK Infrared Telescope (UKIRT). UIST operates at wavelengths of 1-5 μm, providing a variety of imaging and spectrometry modes. UIST is the first instrument to include a cryogenic deployable integral field unit (IFU), allowing integral field spectroscopy to be carried out over a 3.3 x 6.0 arcsec field of view using any of the grisms available for spectroscopy in UIST. The optical components of the image slicing IFU were tested and aligned on the bench before the IFU was integrated into UIST for cryogenic tests in the laboratory in Edinburgh and on the telescope. These tests included measurements of the image quality produced by the IFU and the transmission of the IFU relative to a slit of equivalent width as a function of wavelength, found to increase from 0.4 at 1 μm to 0.62 at 2.5 μm. When the seeing is poor and high spectral resolution is required the loss of light in the IFU may be significantly less than the slit-losses from a conventional slit. The conditions under which use of the IFU may be preferable to use of a silt are discussed. The data reduction methods used to automatically combine IFU observations with arc-lamp spectra, flat-field frames and standard-star spectra in order to transform the two-dimensional output of the IFU into a calibrated (x, y, l) datacube in near real-time and the procedures required to obtain the necessary calibration data are outlined. An example of one type of observation made possible by the IFU is shown by observations of H
2 lines excited in bow-shocks in the outflow from a young star in the vicinity of the ultra-compact H II region G25.65-1.05, allowing measurement of the spatial variation of the excitation temperature in these shocks.- Published
- 2004
45. Semi-classical and quantum Monte Carlo simulations in optical lattices
- Author
-
Winklbauer, Stephen Peter
- Subjects
535.15 - Abstract
This thesis gives an account of work done on semi-classical and quantum Monte Carlo simulations in far-detuned optical lattices. Firstly, the basic principles of laser cooling of atoms are presented including a short introduction to optical lattices in the near and far-detuned regime. A detailed analysis is made of the band-structure of optical lattices, using the Bloch formalism, and of the bound-state population distribution appropriate for a thermal sample of trapped atoms. Secondly, a general overview is given of the quantum Monte Carlo method for simulating the dynamics of atom-light interactions. This is followed by a detailed study of the concept of Raman cooling, which is a useful tool to prepare atoms in the ground motional state of the lattice and an important first step to achieving quantum state control with ultra-cold atoms. A simplified model of Raman cooling is introduced and simulated using the quantum Monte Carlo wave-function approach. Then the implementation of simulations of resolved-sideband Raman cooling based on this model is discussed as is how the results were used to optimize the experimental work done by our group. The results of these simulations show for the first time that the quantum Zeno effect has a crucial impact on the efficiency of Raman cooling experiments. Also the experimental measurements of the temperature of Raman sideband cooled atoms for a range of parameters are compared with theoretical results and shows a good qualitative agreement. Thirdly, the results of semi-classical numerical simulations of parametric excitation in optical lattices are presented. It is shown that the modulation of the potential can result in selective parametric excitation of trapped atoms. The theoretical results show good qualitative agreement with experiment. The thesis is concluded with a description of possible avenues for future studies on quantum state control in optical lattices.
- Published
- 2004
46. The rhetoric of Goethe's erlebnislyrik
- Author
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Kelly, Stephen Peter
- Subjects
831.6 - Abstract
Goethe's early lyric poetry tends to figure in literary history for its thematic (and often biographical) expressivity. By contrast it is the aim of this thesis to pay particular attention to the particular linguistic achievement that makes that poetry possible. This thesis examines the expressive means by which Goethe communicates thoughts and experiences within poetry. I want above all to notice the conduit by which the energies of experience, and reflections upon that experience, become articulate. I first undertake a brief survey of philosophical ideas and linguistic developments that form a context for the poetry readings. I next examine the poetry of Barthold Hinrich Brockes, and some of Herder's writings. These disparate figures both contextualise and prefigure the emergence of Goethe's lyric genius - the former, because his poetry conveys the physical appearance of nature in remarkable detail; and the latter, because he insists on the essential complicity of language in experience. To situate my readings within a critical context, I then chart several critical approaches, and note points of divergence and disagreement between my readings and those of others. The main body of the thesis offers detailed readings of several Sesenheimer Lieder, Willkommen und Abschied, and Maifest. And I look across the period of Goethe's early creativity (the mid-1770's), including both poetry and excerpts from his scientific writings of this time. The aim here is to chart issues of language, of experience, and of poetic self This is undertaken in the belief that the range of his poetry is unified by his characteristic sensibility, by his amazing creativity which has as its source a profound trust in the wholeness of human experience and in the patterns and structures of the organic living process. And finally, I look at several of Goethe's later poems, in an attempt to hear the consistent resonance of his poetic voice.
- Published
- 2003
47. Design, fabrication and characterisation of functional cement-composite micro-devices
- Author
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Bailey, Stephen Peter
- Subjects
621.3 - Published
- 2003
48. Winning the Next War
- Author
-
Rosen, Stephen Peter, primary
- Published
- 2019
- Full Text
- View/download PDF
49. The bishops of King Stephen's reign
- Author
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Marritt, Stephen Peter
- Subjects
941 ,BR Christianity ,D111 Medieval History ,DA Great Britain - Abstract
Traditionally, the bishops who held office during the civil war which dominated King Stephen's reign (1135-1154) have been considered weak and ineffective, able neither to bring peace between the two sides or among warring local barons nor to protect their flocks or even themselves from the so-called 'Anarchy'. The explanation for this has been found in the bishops' lack of spiritual calibre. Bishops have also been seen as withdrawing their support from the king and ending their involvement in royal government, partly because of increasing general ecclesiastical desire for separation between Church and State and partly because of specific disputes with Stephen. As a consequence of all this, bishops are allowed little importance in modern histories of Stephen's reign. This thesis shows that modern historiographical consensus is based in flawed interpretive frameworks which have led to misinterpretation of the nature of the episcopate and its importance in Stephen's reign. It offers more valid alternatives and then re-examines, the royal, ecclesiastical and, especially, the local evidence in light of them to show that, in fact, the bishops were crucially important figures in regional politics, religion and society during the civil war. It proves as well, that they could possess considerable spiritual authority and continued to be committed to the king and active in the government of the kingdom throughout the period. Additionally, each of these also has consequences for how the episcopacy and Anglo-Norman history in general are understood. This is, therefore, a reassessment of the bishops of King Stephen's reign.
- Published
- 2002
50. The legacy of home schooling : case studies of late adolescents in transition
- Author
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Goymer, Stephen Peter
- Subjects
370 ,Parents as teachers ,Autonomous learning - Abstract
A growing number of indjviduals in this country, who share a common background, are gaining academic success, accessing work-related training, further and higher education, and entering rewarding occupations. Their common background is home-schooling. They have received all or part of their 'compulsory' years of education at home. This is a study of a small number of such individuals aged sixteen and over. I include case studies of their family's home-schooling experiences and focus on the legacy that this 'alternative' education has provided for their transition into 'institutionalised' learning - at school, college, university or workplace. I explore political, historical and philosophical perspectives of the 'movement', which has escalated rapidly in the USA over the past twenty years and is gaining impetus in the UK. Views expressed by Education Authority officers, teachers and employers also help me to frame my inquiry into whether this educational provision presents an appropriate rather than (as I initially viewed it ) a radical alternative to school. As well as revealing the development of my understanding of this multifaceted, alternative form of 'child-centred' education, this study also examines the methodological complexities of the inquiry.
- Published
- 2001
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