2,095 research outputs found

    Connected Lie Groupoids are Internally Connected and Integral Complete in Synthetic Differential Geometry

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    We extend some fundamental definitions and constructions in the established generalisation of Lie theory involving Lie groupoids by reformulating them in terms of groupoids internal to a well-adapted model of synthetic differential geometry. In particular we define internal counterparts of the definitions of source path and source simply connected groupoid and the integration of AA-paths. The main results of this paper show that if a classical Hausdorff Lie groupoid satisfies one of the classical connectedness conditions it also satisfies its internal counterpart.Comment: Statement of Theorem 4.7 and notation in Section 4.3 correcte

    Early rebellion and its links to later success and conquest: Why was it that some Norman rulers profited from rebellions early in their reigns, whilst others did not?

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    The subject of this dissertation is the Normans. Its objective is to analyse the development of their civilisation, and to give reasons for their numerous accomplishments, both in Northern Europe and in the Mediterranean. Yet, unlike the many scholars who have studied the Normans before, the main focus here will be on rebellion, and in particular those rebellions which followed the succession of each Norman ruler (either a king or a duke/count), as it will be argued that when dealt with correctly these revolts did not hinder, but instead created the seeds of power and progress; since they gave the new ruler an opportunity to establish a lasting precedent early on, that insolence to their authority would not be tolerated; which if accomplished, then led to harmony (internal peace), development and conquest for the rest of the ruler’s reign

    GPR investigations of the sedimentary architecture of jökulhlaup eskers : Skeidarájökull, Iceland and Bering glacier, Alaska

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    Abstract Eskers are ridges of stratified glaciofluvial material deposited in englacial, subglacial or supraglacial channels and ice-walled canyons. Eskers have been used to infer the dynamics and palaeo-hydrology of large ice sheets, despite observations of palaeo-esker sedimentary architecture lacking rigorous constraints on depositional timescale. This research aims to identify the hydrological, glaciological and sedimentary controls on the sedimentary architecture of single event outburst flood (jokulhlaup) eskers at SkeiOarârjOkull and Bering Glacier. These eskers formed during monitored outbursts, providing time constraints on the depositional events, thereby making the eskers ideal analogues for palaeo-eskers. GPR data was collected using a pulseEKKO Pro 1100 system at SkeiOarârjOkull and Bering Glacier during field seasons in 2006 and 2007. At SkeiOarãrjOkull grids of 100 MHz GPR lines were collected on the glacier surface and 200 MHz GPR grids were collected on all workable sections of an esker and ice-walled canyon fill generated by a jokulhlaup in November 1996. At Bering Glacier 200 MHz GPR grids were collected on workable sections of an ice-walled canyon fill and esker generated during outbursts in July-August and October 1994, respectively. Examination of the GPR data has allowed development of site-specific models for esker and ice-walled canyon fill deposition, providing the first detailed insight into the sedimentary architecture of single event jokulhlaup eskers. These models show that single high-magnitude jOkulhlaups can generate eskers with complexities previously unexpected for single events. The englacial position of an esker is controlled by the presence of structural weaknesses within the ice and the jokulhlaup release mechanism. Esker sedimentary architecture, on the other hand, is controlled by a complex interaction between hydrological, glaciological and sedimentary factors. The most fundamental control on jokulhlaup esker sedimentary architecture is conduit geometry, which determines the type of macroform from which the esker is composed. Thus, eskers deposited during jOkulhlaups should be made up of both wide ridges as composite macroforms in areas of conduit expansion and narrow ridges composed of upper-stage plane beds in constricted conduits. The smaller scale sedimentary features, which include antidunes and boulder clusters, as well as the frequency of erosional structures, are controlled by interactions between the flow conditions and sediment supply. The eskers generated during the 1996 SkeiOarãrhlaup and 1994 Bering Glacier outburst flood demonstrate sedimentary architectures that are similar to those identified in many palaeo-eskers described from previous studies. The research suggests that jOkulhlaups may have had a greater role in palaeo-esker sedimentary architecture than previously hypothesised

    The principles of public transport network planning: a review of the emerging literature with select examples

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    This paper highlights for urban planners the key strategies and tactics that can be deployed to improve suburban public transport networks. Introduction The governance and management of public transport systems is an essential component of metropolitan planning and urban management. Most metropolitan strategies in Australia and in other jurisdictions presuppose the provision of public transport. Yet there is often a disconnection between transport plans and land-use schemes. Similarly, metropolitan land-use plans that do integrate with transport plans tend to focus on infrastructure rather than service quality and connectivity. A failure to adequately consider the quality of public transport networks in land-use planning analysis has the potential to produce poor planning outcomes in two key ways. First new land-uses may be inadequately served with public transport services, leading to dependence on alternative travel modes, such as cars. Second, the failure to recognise the significance of well-planned local public transport networks may result in the preclusion of some land-use options. This preclusion may relate to the location of land-uses or their design, such as over-provision of carparking. The continuing debate over whether to address suburban cardependence via land-use change or via transport planning is a case in point. And while the arguments in favour of and against land-use change as a means to overcome car dependence are well known in the planning literature. There is a growing if not yet widely appreciated literature that advocates improvements to public transport network planning and coordination as a means of reducing car dependence. The recognition of improved public transport network planning as a means of reducing car dependence is immensely significant because it offers planners an additional or alternative tool for managing urban transport patterns beyond land-use variation or investment in heavy infrastructure. Urban planning practitioners are not yet well served and informed by the broader public transport planning literature on the advantages of public transport network planning. While there is an extensive literature focusing on the economics and engineering of urban public transport systems the planning literature on the practices that contribute to success in public transport network design and operations is relatively poorly documented. There is also very little literature dedicated to public transport network design within Australian cities which are distinguished by highly centralised radial heavy rail networks with bus or tram networks that are well developed in inner urban zones but less so in the outer suburbs. The remainder of this paper has four objectives for transport planning theory and practice. First the paper reviews the literature on public transport network planning principles; next the paper attempts to formulate these principles in practical terms such that they can be applied to line and network design; third the paper considers further dimensions of network planning, including institutional arrangements and transition points in network design. The paper is intended for three audiences. The first is planning scholars who are involved in debates about public transport. The second is strategic policy officials in planning agencies who are involved in the planning and design of public transport networks. The third audience comprises those involved in development processes and who seek insights into the technical components of public transport network planning. Some caveats are appropriate however. The paper is not seeking to justify public transport network planning. The authors consider that the case for dedicated planning is implicit in the assumption that cities should provide good quality public transport to their residents. The wider case in favour of network planning has been successfully advanced elsewhere. Conversely, the paper is not intended as a directly applicable manual of detailed transport planning practice. While it does offer some insights into the practical public transport network planning task such guidance is better provided by Nielsen et al and Vuchic. Instead the paper highlights for urban planners the key strategies and tactics for that can be deployed to improve suburban public transport networks. Understanding these principles should thus assist urban planners – and urban scholars – to better shape and evaluate urban development processes and patterns

    Understanding the Skills Necessary for Advanced Practice Nurses in Oncology to Deliver Bad News to Patients with Cancer: The Results of a Delphi Analysis

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    Overcoming the dichotomy of providing bad news in a compassionate, empathetic manner that strengthens dialogue and enhances a caring environment is the ultimate challenge advanced practice nurses (APN) face in oncology. This study aims to understand the skills necessary for APNs in oncology to deliver bad news to patients with cancer. Using a Delphi analysis, an established method of developing a consensus, a novel, patient-centered survey tool has been developed designed to extract as much information as possible about the present issue from an expert panel. Oncology APNs were recruited via Facebook. The survey tool was administered using a web-based survey tool. Content analysis was applied to the stories and responses to open-ended questions that panelists submitted. Results were collected and then presented back to the panel for ranking. Twelve expert panelists reached a consensus on a practice-based method focused on teaching empathy and self-awareness. The results of this pilot project serve as the foundation for future research and for the development of a curriculum to educate new APNs or those new to the field of oncology

    The Movement: A Performance Venue

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    The aim for the thesis project is to design a concert venue for the City of Saint Albans, Vermont. The venue will serve as an entertainment hotspot, an educational tool, a set of rehearsal spaces, and performance halls with recording capabilities. The goal is to create a welcoming entertainment and educational environment, open to use by all, to show that music is more than entertainment, but also a hobby, an educational medium, a skill-set, and a tool. The driving theme behind the project is the concept of movement. Its first representation is in music. Sound itself is movement; it is pressure; it is the air moving around you, translated to the audible spectrum by your ears and brain. It is impossible to perform music without moving in some way. Second, water will be moving through the building (as in all buildings), but in this special case through an in-pipe microhydropower system. Lastly, the idea of a landmark, contemporary concert hall in Saint Albans constitutes progress and forward movement in the City’s development
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