Thesis (M.A.)--Trinity Evangelical Divinity School, 2005. / Abstract. Includes bibliographical references (leaves 131-144).

Thesis (M.S.)--Edinboro University of Pennsylvania, 2007. / "Technical report 06-03." Typescript, photocopy. Includes bibliographical references. Also available online: http://cslab103.cs.edinboro.edu/~WEBEBOOK/

Thesis (J.C.L.)--Catholic University of America, 1985. / Typescript. Includes bibliographical references (leaves 49-50).

Last year at the ECDL 2004 conference, we reported some initial progress and experiences developing DSpace as an open source community-driven project [8], particularly as seen from an institutional manager’s viewpoint. We also described some challenges and issues. This paper describes the progress in addressing some of those issues, and developments in the DSpace open source community. We go into detail about the processes and infrastructure we have developed around the DSpace code base, in the hope that this will be useful to other projects and organisations exploring the possibilities of becoming involved in or transitioning to open source development of digital library software. Some new challenges the DSpace community faces, particularly in the area of addressing required system architecture changes, are introduced. We also describe some exciting new possibilities that open source development brings to our community.

As more and more output from research institutions is born digital, a means for capturing and preserving the results of this investment is required. To begin to understand and address the problems surrounding this task, Hewlett-Packard Laboratories collaborated with MIT Libraries over two years to develop DSpace, an open source institutional repository software system. This paper describes DSpace in the context of the Open Archival Information System (OAIS) reference model. Particular attention is given to the preservation aspects of DSpace, and the current status of the DSpace system with respect to addressing these aspects. The reasons for various design decisions and trade-offs that were necessary to develop the system in a timely manner are given, and directions for future development are explored. While DSpace is not yet a complete solution to the problem of preserving digital research output, it is a production-capable system, represents a significant step forward, and is an excellent platform for future research and development.

The high flow-performance sensitivity in open-end municipal bond funds motivates fund managers to actively manage funding liquidity risk and reduce the costs of flow-driven transactions. Funds with volatile past flows build up liquidity buffers by holding more cash and liquid municipal bonds in their portfolios. Funds rely on cash and liquid securities in flow management. Unconventional liquidity management tools, such as cross-trading between funds in the same family, are used by municipal bond funds in extreme situations. Fund families coordinate cross-trades between open- and low-value closed-end funds only when open-end funds are in distress.

No description available.

Large-scale networked environments, such as the Internet, possess the characteristics of distributed data, distributed access and distributed control; this gives the user a powerful mechanism for building and integrating large repositories of distributed information from diverse resource sets. However, few support tools have been developed to allow the user to take advantage of the distributed nature of their information. Distributed information management is the process by which users can create, disseminate, discover and manage information that is spread across distributed resources. Distributed open hypermedia systems have shown how distributed information, such as documents and hypermedia links, can be managed and handled within an environment that integrates smoothly between the user's desktop and the network. However, such systems are now looking at addressing the problem of interoperability across hypermedia systems, so that documents and links can be shared between users on heterogeneous integrating technologies. This thesis proposes that the distributed information management provided by open hypermedia systems needs to be extended so that it is more interoperable, extensible and pervasive and that this can be achieved by integrating the principles of open hypermedia with the technology of mobile agents. Mobile agents present a new development mechanism for designing and building distributed applications which are well suited to the dynamic environment of large-scale networks. This thesis describes the development of a mobile agent architecture within which distributed information management tasks can be built and executed. Mobile agents present an important abstraction mechanism when designing distributed environments and also allow the user to manage distributed information indirectly through their mobile agents. A number of prototype agents are described that have been developed to illustrate distributed information management tasks within the architecture and to show how abstractionism and indirect management can be achieved.

The title may be a bit misleading. Perhaps, "On the Complete Positivity of Reduced Quantum Dynamics," would be a more fitting title. Determining whether or not completely positive (CP) maps are required to describe open system quantum dynamics is an extremely important issue concerning the fundamental mathematical foundations of QM, as well as many other areas of physics. it had been typically believed that only CP maps actually describe the dynamical evolution of open quantum systems, however there has been speculation as to whether this is a strict constraint on the mathematical and physical structure of stochastic quantum dynamical maps. The objective of this thesis is to demonstrate that given a particular unitary operator, an initial system state, a final system state, and the dimension of the environment state, there exists no CP map with a composite system-environment, product initial state that is compatible with the given constraints on the reduced quantum dynamics of the system under investigation.

Magíster en Minería. Ingeniero Civil de Minas / Hoy en día, las minas a cielo abierto están siendo cada vez más profundas, lo que hace cada vez más atractivo el recuperar las reservas restantes mediante métodos subterráneos, tanto en las partes más profundas del pit como en sus zonas circundantes. Por lo tanto, estas operaciones han empezado a desarrollar nuevas estrategias para extraer el mineral mediante operaciones subterráneas. Para cuerpos masivos, los métodos más rentables son los que consideran el hundimiento de la roca, en particular, los métodos de block/panel caving, debido a sus bajos costos operacionales y alta productividad con respecto a otros métodos subterráneos de extracción. Las metodologías aplicadas para definir el periodo óptimo de transición desde la mina a cielo abierto a la subterránea son casi siempre limitados o sesgados, debido a que tienden a darle prioridad a la primera, que no necesariamente resulta en el VAN óptimo. En este trabajo, se propone una nueva metodología para maximizar el VAN basado en la secuencia de agendamiento para el caso conjunto cielo abierto a panel caving. Primero, se calculan las envolventes económicas para la mina a cielo abierto y la mina de panel caving, considerando potenciales pilares coronas entre ellos a modo de estabilidad. Después, se realiza el secuenciamiento de bloques y la maximización del VAN, considerando restricciones operacionales y geomecánicas para estudiar su influencia en el agendamiento. Este modelo de optimización ha sido aplicada tanto a modelos de bloques sintéticos y aquellos de escala minera. Los planes de producción, cambios en el periodo óptimo de transición, el secuenciamiento de los bloques, la alimentación a planta y las variaciones del VAN se analizan basados en los diferentes grupos de parámetros y variantes de extracción para suplir el ramp-up de la mina subterránea. Dichas variaciones en el caso de estudio tienen un impacto importante en el periodo óptimo de transición (pasando desde el año 31 hasta el año 50), enfrentando bajas importantes en la alimentación a planta en los planes de carácter secuencial durante la transición. El VAN, por su parte, no difiere de manera importante al analizar el proyecto desde su inicio (variación cercana al 1.2\% entre el peor y el mejor caso). Sin embargo, si se toma el año inicial para el análisis del VAN en un periodo posterior, como lo es el año 30 de la extracción, las diferencias son de mayor importancia (cercano al 93\% entre el peor y el mejor caso). Esta metodología es una herramienta que puede ayudar al planificador a observar diferentes casos durante la transición. Sin embargo, se recomienda incluir más componentes al modelo, como es la incorporación de un modelo geomecánico extenso tanto para la mina a cielo abierto como la subterránea, además de la integración de fases e interacción entre ellas en este primer método, y la integración de sectores o paneles en el segundo. / Este trabajo ha sido parcialmente financiado por CSIRO y AMTC