Ingeniero Civil en Computación / Los avances en computación móvil y redes inalámbricas están posibilitando grandes oportunidades de desarrollar sistemas colaborativos. La concepción y diseño de estos sistemas representa un desafío para los diseñadores de software debido a la heterogeneidad y dinamismo de las interacciones que deben ser soportadas. El poder modelar y evaluar el sistema en fase de diseño permite detectar errores y sugerir mejoras que ayuden al desarrollo dirigido a un producto final que realmente soporte el trabajo colaborativo. En este contexto, investigadores del Departamento de Ciencias de la Computación de la Universidad de Chile propusieron un lenguaje visual de modelamiento de sistemas colaborativos. El lenguaje asume que el sistema puede ser estructurado como una Human-centric Wireless Sensor Network. Éste es un tipo de red que permite modelar y entender los flujos de información de un sistema colaborativo que tiene como protagonistas a las personas. El lenguaje de modelamiento permite representar un sistema colaborativo como un grafo, en el que se encuentran caracterizados sus participantes y la forma en que estos interactúan. En este trabajo de memoria se diseñó e implementó una herramienta gráfica destinada a diseñadores de software que permite el modelamiento de sistemas colaborativos usando el lenguaje propuesto por los investigadores. La herramienta fue desarrollada como una aplicación web en la que interactivamente se pueden definir los participantes del sistema colaborativo y sus interacciones. La representación de los escenarios en forma de grafo permite aplicar metodologías de análisis en forma automática. En esta memoria se adaptaron e implementaron dos análisis que fueron desarrollados para un lenguaje similar. El primero es un análisis que permite evaluar la coherencia en las interacciones entre los participantes. Para este análisis se desarrolló un algoritmo eficiente que permitió la evaluación automática a medida que el diseñador va realizando cambios en el modelo. El segundo análisis permite generar requerimientos generales de software que deben estar presentes en la aplicación colaborativa para soportar apropiadamente las interacciones modeladas. La lista de requerimientos se genera para cada participante de la red, basado en como estos interactúan con los demás. La lista generada puede ser refinada por el diseñador del sistema, de acuerdo con las necesidades particulares de cada aplicación. Se espera que la herramienta contribuya a fomentar el uso del lenguaje y de esta forma facilitar el desarrollo de sistemas colaborativos que aprovechen los nuevos e interesantes escenarios de colaboración que está permitiendo el auge de los dispositivos móviles.

This thesis explores the possible gains and discusses the constraints of a communications system that uses a ship to unmanned aerial vehicle (UAV) radio frequency (RF) link paired with a UAV to satellite free space optic (FSO) link to accomplish satellite communications. Analysis shows that a data rate of 2 gigabits per second (Gbps) with a 1 . 10 probability of bit error can be attained by a shipboard system with a relatively small antenna and power supply if an FSO-enabled UAV is used. An experiment demonstrated that the addition of an FSO link and additional routing does not reduce the performance of a slower data rate RF link. The findings indicate that a composite RF and FSO ship-UAV-satellite system can be used within the Transformational Communications Architecture (TCA) and with the Navy's FORCEnet to enable network-centric operations (NCO).

This thesis will examine the potential of the two competing designs for the Littoral Combat Ship (LCS), with regard to potential deployment of this vessel type by the Turkish Navy. The first design is by Lockheed Martin and has been designated the USS Freedom as the U.S. Navyâ s first LCS. The second design is by General Dynamics. This thesis will focus on the LCS usage concepts in Naval Capability Pillars and Information Operations. As a transformation platform, the LCS will be critical in implementing new operational concepts and in providing a focused, littoral mission platform for joint forces. Its superior speed and maneuverability; low radar, infrared, and acoustic signatures; and ability to lay distributed sensor fields are all fundamental to mission success. It will also carry a â squadronâ of unmanned vehicles (air, surface, and undersea) that will considerably extend its sensor and weapon coverage and provide substantial Anti-Submarine Warfare (ASW) capabilities. This thesis will also discuss present and future platforms and their concepts of operation in Turkish littoral waters (Aegean Sea, Black Sea, and Mediterranean Sea).

Approved for public release, distribution is unlimited / The concepts of DoD information operations and network centric warfare are still in their infancy. In order to develop concepts, the right conceptual models need to be developed from which to design and implement these concepts. Information operations and network centric warfare are fundamentally based on trust decisions. However, the key to developing these concepts is for DoD to develop the organizational framework from which trust, inside and outside, of an organization may be achieved and used to its advantage. In this thesis, an organizational model is submitted for review to be applied to DoD information systems and operational organizations. / Outstanding Thesis / Lieutenant, United States Navy

Approved for public release, distribution unlimited / Network-centric warfare (NCW) has changed the way the Department of Defense addresses technological improvements for its military forces. No longer is the emphasis on enhancing the capabilities of a single platform, but the focus is now on networking people, processes and technology to enable knowledge sharing and rapid decision-making. The capabilities required to support network-centric operations (NCO) in the NCW environment must be supported by new, innovative networked communication technologies. There are many sources of requirements for these software systems supporting NCO, which may increase in number as the Services continue to develop the capabilities necessary for the transformation to a fully networked military force. Requirements may also emerge and continue to evolve following the fielding of a NCO capability because new technology has the potential to change how warfighters work. Requirements evolution results in requirements engineering challenges associated with the acquisition and development of network-centric software systems. As such, an approach is needed to provide for consistency in elicitation, management and documentation of evolving requirements for technological capabilities supporting NCO. The purpose of this research is to address the problem of evolving requirements. The requirements engineering framework proposed by this thesis incorporates classification theory and requirements modeling principles, and is supported by the Extensible Markup Language (XML) family of technologies. Particular attention has been paid to the selection of non-proprietary, platform independent technology to ensure data can be exchanged between organizations. The framework demonstrates a means by which requirements can be classified and structured in a standardized format. The result is a set of requirements that is consistent in structure and content, and that can be easily shared among all stakeholders because it utilizes one standard, non-proprietary format. This approach captures evolving software requirements of fielded network-centric software systems for use in the development of future systems. / US Navy (USN) author.

Approved for public release, distribution is unlimited / The United States Navy and its joint partners continually seek to maintain a responsive, agile, and effective fighting force well suited to combat present-day threats to national security. As a result, U.S. forces are currently undergoing force transformation to adopt an organizational structure capable of supporting this mission. This new organizational structure is known as Network-Centric Warfare. The purpose of this research is to analyze any performance metrics, measures of effectiveness, or analytical methods used by existing organizations engaged in network-centric operations that would assist the Navy and joint forces along with its transformation process. This research will be done in the form of a literature review, examining existing material written on communication, economic/business, and social/organizational networks. In addition to identifying quantitative and qualitative metrics, an emphasis will be placed on the methodologies used for network assessment. Final sections relate findings from each resource to Network-Centric Warfare and address matters relevant to the future of force transformation. / Ensign, United States Navy

We  are increasingly turn to social media for our news consumption two related media phenomenon that influence media consumption are the “Echo chamber” and “Filter Bubble”. Echo chamber this the phenomenon that we tend to have conversation only with those that has the same likeminded as we do while Filter bubble is created by Social media and information retrieval technology that tends to priorities showing us things it already know we like. The aim of this thesis is to suggest design solution for social media that may counter the effect of “Echo chamber” and “Filter Bubble”. The precise method used on this thesis is play centric design method and both intermediate and final evaluations were done through qualitative evaluation. At the end a design solution of Viewlette game were presented. It can be concluded that the suggested design solution may have the tendency to counter the effect of Filter bubble and Echo chamber on social networking site by enabling people that has conflicting points of view to still listen to each other and understand an argument from different perspective. / Som vi i allt högre grad vänder  oss till sociala medier för vår nyhetskonsumtion, två besläktade medier fenomen som påverkar mediekonsumtion är "Ekokammare" och "Filter Bubble". Ekokammare är fenomen där vi tenderar att ha samtal endast med dem som har samma intresse som vi själva, medan Filter bubbla skapas av sociala medier och informationssöknings teknik som tenderar att prioriteringar och visar oss saker man redan vet att vi gillar. Syftet med denna avhandling är att föreslå konstruktionslösningen för sociala medier som kan motverka effekten av "Echo kammare" och "Filter Bubble". Den exakta metod som används på denna avhandling är att spela centrerade designmetod och både den mellanliggande och slutliga utvärderingen som görs genom kvalitativ bedömning. I slutet presenterades en designlösning av ”Viewlette”- spelet. Man kan dra slutsatsen att den föreslagna designlösningen kan ha en tendens att motverka effekten av “Filter bubble” och “Echo chamber” på nätgemenskap, genom att människor som har motstridiga synpunkter fortfarande lyssna på varandra och förstå ett argument från olika perspektiv.

Magister Artium - MA / The departing point of the thesis is that the neglect of African's intellectual heritage within the South African Universities and in public discourse undermines the ability of the post-apartheid government to set its developmental agenda and maximize its democratic potential. The thesis highlights the neglect of Professor Mafeje's scholarly contribution as an example of this neglect and argues that an engagement with his scholarly output might have differently shaped the debate on the thematic issues that are covered in this study. Against this backdrop, this study explores Mafeje's scholarly works in the areas of state, development and democracy, specifically focusing on the insight that we can garner from his scholarly works that will allow us to re-examine the challenges of development. In this context Mafeje's work is examined and situated within the social history of his milieus. The study employs social constructionism to explore the scholarship of Professor Mafeje. An important aspect of this theoretical framework is social embeddedness. Brunner (1990:30) has argued that it is culture, not biology that shapes human life and mind. The important aspect of this approach is that it acknowledges that the way we commonly understand the world, the categories and concepts we use, are historically and cultural specific. Mafeje's ideas make sense when located within complex social contexts in which they were produced. Because he was not producing knowledge in a vacuum, an understanding and appreciation of his ideas must be located within the social history that produced them.

No description available.

Thesis (M.S.)--University of Michigan, 1983.