Over the past decade (2000-), the management of vestibular schwannomas has been in a state of flux. An increasing availability of magnetic resonance imaging has allowed clinicians to monitor tumour progression and increasingly, it has become recognised that once diagnosed, a significant proportion of lesions do not continue to grow. As a result, a number of neurotological centres have advocated conservative management as appropriate for small-medium sized tumours. Birmingham has been one of these centres, and this thesis presents data gathered over the past fifteen years that reflects this change in management, drawing upon the Birmingham Vestibular Schwannoma Database maintained by the author. The thesis addresses issues pertinent to conservative management: growth rates among observed tumours, risk factors for growth, the evolution of hearing while under observation and proposes a radiological surveillance protocol. More broadly, the thesis examines other themes important in the management of patients with vestibular schwannomas: the role of functional surgery and the possibility of rehabilitation in single-sided deafness. A number of chapters from the thesis have been published in peer-reviewed journals and are presented here in updated or amended form.

The thesis addresses the evolution of West Africa’s djembe drumming, with particular reference to the changing habitus of the djembefola. It investigates how the djembe has developed from the rural system of tribal ritualistic music intended for ceremonies to a practice enacted in the Western world, in both geographical and virtual spaces, including the social networking platform Facebook. It also highlights how, at present, djembe related activities are subject to business transactions orientated towards generation of profit for both the djembefola and other parties. Conceptually, the thesis draws on Pierre Bourdieu’s Outline of a Theory of Practice (1972), Victor Turners approach to liminality in The Forest of Symbols (1967) and The Ritual Process (1997) and the concept of cultural paradigm, as used in anthropological studies (Douglas, 1985; Rogoff et al., 2014). Additionally, it explores the implications of the evolution of djembe drumming over time for our understanding of the organisation of the djembe. This is discussed in the context of the political, economic, social and technological conditions underlying djembe practice. Empirically, the research adopts an interpretive, ethnographic and netnographic approach, comprising four case studies. Fieldwork was conducted in the Gambia and in the virtual space represented by social media. The data included material obtained through interviews with djembe teachers and students, as well as Facebook posts contributed by members of djembe related interest groups. The analysis demonstrates that, at present, the djembe habitus has entered a new phase, which the thesis identifies as a fourth cultural paradigm, concomitant with the most contemporary version of the djembe habitus.

The Internet has revolutionized the way in which people are entertained, communicate and collect information. As people increase their ability to connect with the outside world from inside their homes, they hold the power to become their own gatekeepers filtering information as they see fit. Many question whether this will weaken the power of the traditional media sources that are often seen as elitist and potentially biased. This researcher hypothesized that people who cite high credibility ratings of news media channels are more likely to use traditional media channels such as television and newspapers and people who cite low credibility ratings of news media channels are more likely to use alternate media channels such as the Internet. While the researcher was unable to reject the null hypothesis, a pattern of general mistrust of traditional news media was revealed when nearly three-fourths of respondents gave traditional media channels a "not-credible" rating. / by Katrina Herring. / Thesis (M.A.)--Florida Atlantic University, 2010. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2010. Mode of access: World Wide Web.

Printing has been one of Scotland's most significant industries since it was introduced over 500 years ago but remained for much of the period, a local industry. The Scottish publishing and printing industries in the nineteenth century left many documentary traces, but most research has concentrated on large urban centres such as Edinburgh, Glasgow and Aberdeen, with regional centres of print production all but ignored. In the nineteenth century, these local print economies served the business, administrative, political and leisure needs of an increasingly urbanised Scotland. My research is focused on the operation of the support structures and networks which developed among operative printers in Scotland's regional print centres from around 1830 to the end of the nineteenth century. As a case study I have selected the Royal Burgh of Dumfries, the most important market town in south-west Scotland, which was also a stop on the route between central Scotland and the industrial centres of Lancashire, and further south to London. A local printing industry developed during the eighteenth century, and by 1830 Dumfries was the home of a range of businesses in the printing and allied trades. The examination of the local print economy investigates the businesses and organisations engaged in print production and distribution in the local area, the technologies which were in use, and the material record of the town. The individual 'print trade lives' are considered in some detail, looking at the range and variety of career patterns in the industry. The options for a larger study of print networks based on trade records are also considered. Sources for the study include local and regional trade society records, business records, trade journals and other publications, and contemporary (mainly local) newspapers. It also draws on technological manuals and other secondary material in Edinburgh Napier University's Edward Clark Collection.

Although early predictions that an emerging 'cyberspace' could exist in separation from offline life have been largely discarded, anthropological studies of the internet have continued to find notions of 'virtual reality' relevant as individuals use these technologies to fulfil the "pledges they have already made" (Boellstorff, 2008; Miller & Slater, 2001: 19) about their own selfhood and their place in the world. There are parallels between this concept of 'virtual reality' and the on-going spiritual labour of Charismatic Christians in the UK, who seek in the context of a secularising nation to maintain a sense of presence in the “coming Kingdom” of God. The everyday production of this expanded spiritual context depends to a large extend on verbal genres that are highly gendered. For women, declarations of faith are often tied to domestic settings, personal narratives, and the unspoken testimony of daily life (e.g. Lawless, 1988; Griffith, 1997). The technologies of the internet, whose emerging genres challenge boundaries between personal and social, public and private, can cast a greater illumination on this inward-focused labour. This doctoral thesis is based on ethnographic research in four Charismatic Evangelical congregations and examination of the online practices of churchgoers. I have found that the use of the internet by Charismatic Christian women fits with wider religious preoccupations and patterns of ritual practice. Words posted through Facebook, blogs, Twitter, and other online platforms come to resemble in their form as well as their content Christian narratives of a life with meaning.

Music collections available to listeners have grown at a dramatic pace, now spanning tens of millions of tracks. Interacting with a music retrieval system can thus be overwhelming, with users offered ‘too-much-choice’. The level of engagement required for such retrieval interactions can be inappropriate, such as in mobile or multitasking contexts. Music recommender systems are widely employed to address this issue, however tend toward the opposite extreme of disempowering users and suffer from issues of subjectivity and confounds, such as the equalisation of tracks. This challenge and the styles of retrieval interaction involved are characterised in terms of user engagement in music retrieval, and the relationships between existing conceptualisations of user engagement is explored. Using listening histories and work from music psychology, a set of engagement-stratified profiles of listening behaviour are developed. A dataset comprising the playlists of thousands of users is used to contribute a user-centric approach to feature selection. The challenge of designing music retrieval for different levels of user engagement is first explored with a proof of concept, low engagement music retrieval system enabling users to casually retrieve music by tapping its rhythm as a query. The design methodology is then generalised with an engagement-dependent system, allowing users to denote their level of engagement and thus the specificity of their music queries. The engagement-dependent retrieval interaction is then explored as a component in a commercial music system. This thesis contributes the engagement-stratified profiles and metrics of listening behaviour, a corresponding design methodology for interaction, and presents a set of research and commercial applications for music retrieval.

Since the 1980s, two paradigms have dominated the representation of formatted electronic documents: flowable and fixed. Flowable formats, such as HTML, EPUB, or those used by word processors, allow documents to scale to any arbitrary page size, but typographical compromises must be made since the layout is computed in real time, and is re-computed each time the document is displayed. Conversely, fixed formats such as SVG or PDF are afforded the potential for arbitrarily complex typography, but are constrained to the fixed layout that is set at the time of creation. With the recent surge in popularity of low-powered portable reading devices -- from tablets to e-readers to mobile phones -- there is an expectation that documents should scale to any size, maintain their high-quality typography, and not provide unnecessary strain on an already overloaded battery. This thesis defines a novel paradigm for electronic document representation -- the Malleable Document -- whereby documents are partially typeset at the time of creation, leaving enough flexibility that their content can be flowed to arbitrary page sizes with minimal computation. One tradeoff encountered is that of increased file size, and this is addressed with a bespoke, computationally-light compression scheme. A sample implementation is presented that transforms documents from a source format into Malleable Document format, alongside a lightweight display engine that enables the documents to be viewed and resized on a wide range of devices, mobile and otherwise. Reviews of the technical aspects and a user study to evaluate the quality of the system's rendering and layout show that the Malleable Document paradigm is a promising alternative to both fixed and flowable formats, and builds upon the best of both approaches.

Verification of access control systems against vulnerabilities has always been a challenging problem in the world of computer security. The complication of security policies in large- scale multi-agent systems increases the possible existence of vulnerabilities as a result of mistakes in policy definition. This thesis explores automated methods in order to verify temporal and epistemic properties of access control systems. While temporal property verification can reveal a considerable number of security holes, verification of epistemic properties in multi-agent systems enable us to infer about agents' knowledge in the system and hence, to detect unauthorized information flow. This thesis first presents a framework for knowledge-based verification of dynamic access control policies. This framework models a coalition-based system, which evaluates if a property or a goal can be achieved by a coalition of agents restricted by a set of permissions defined in the policy. Knowledge is restricted to the information that agents can acquire by reading system information in order to increase time and memory efficiency. The framework has its own model-checking method and is implemented in Java and released as an open source tool named \(\char{cmmi10}{0x50}\)\(\char{cmmi10}{0x6f}\)\(\char{cmmi10}{0x6c}\)\(\char{cmmi10}{0x69}\)\(\char{cmmi10}{0x56}\)\(\char{cmmi10}{0x65}\)\(\char{cmmi10}{0x72}\). In order to detect information leakage as a result of reasoning, the second part of this thesis presents a complimentary technique that evaluates access control policies over temporal-epistemic properties where the knowledge is gained by reasoning. We will demonstrate several case studies for a subset of properties that deal with reasoning about knowledge. To increase the efficiency, we develop an automated abstraction refinement technique for evaluating temporal-epistemic properties. For the last part of the thesis, we develop a sound and complete algorithm in order to identify information leakage in Datalog-based trust management systems.

This is a case study of a federal bureaucracy and its Information Resource Management (IRM) organization. The Bonneville Power Administration (BPA), a federal power marketing agency and part of the Department of Energy, significantly impacts the western United States. BPA is responsible for developing electric power resources, transmission of electric resources. power conservation programs, and fish and wildlife programs. The focus of the study is the perception of the quality of information supplied to management, assuming that better information makes better decisions. The study uses a pre-experimental research design to evaluate the satisfaction executive and middle management with information they use to make decisions. The study uses both questionnaire and interview methodologies to examine management opinions before the establishment of IRM and two years after the establishment of IRM. Literature on bureaucracy indicates that decision making has limits and processes. Channels of communication, both formal and subformal are used by decision makers to gather information to fill information gaps. The gaps exist because formal channels of information do not supply sufficient information. Consequently, decision makers constantly search for information. There is a great deal of literature addressing IRM and other similar organizations. The technical and operational sides of information management are occasionally conflicting but, adequately addressed. Information assessment and evaluation are approached inadequately.

The household has always been a place of information consumption. While much is known about the modern household as a consumer of information and adopter of information-related technologies, virtually nothing is known about how the household -as a collectivity - processes and manages its information. This research represents the first systematic study of the household as a human information system and presents an understandingtype theory of household information practices. Using dimensional analysis (including theoretical sampling) as proposed by Schatzman (1991), the information practices of eleven households (28 householders) were explored. Each householder completed a questionnaire to identify the information and information-related devices and services used in the household. This was followed by an unstructured group interview that explored the information practices in the household. Analysis of the questionnaires and interviews revealed that within a household it is individual householders who process and manage information. They do so because information has a role in their life, that is, particular information is meaningful for them. Each householder thus devises their own individual information practices, representing the unique way in which a householder comes to live with information. Household information practices are the sum of these individual information practices. They are mediated by two enabling processes - taking charge and negotiating - and nine dimensions of action. Six of the dimensions affect the information practices of individual householders - which are themselves a dimension - while the final two represent, respectively, the consequences of living with and without information. All processes and dimensions operate against, and interact with, a changing structural context of information, technology and society. As a result, each household has a characteristic mode for dealing with information. The centrality of negotiation in developing household information practices indicates that the practices are socially constructed and represent an emergent phenomenon. This, in turn, suggests that the household as an information system is a negotiated order. Insights from the research can be applied to other types of organisations and other aspects of the Information Systems discipline. Areas of further work are identified to expand upon the exploratory nature of this research.