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No / This paper presents a Master/Slave redundancy mechanism for the airborne Integrated Modular Radio to improve the reliability of the joint radio resource management (JRRM) system. The proposed mechanism adopts keep-alive heart beat messages and real time information synchronization to ensure a smooth switchover in the event of a platform failure. To enhance the scalability and decoupling of the system, the proposed hot swap solution makes the JRRM switchover transparent to both the higher layers and the lower layers. The experiment results and the performance obtained from the test-bed has proved the validity of the solution.

Scholarship on slave families has focused on the nuclear family unit as the primary socializing institution among slaves. Such a paradigm ignores the extended family, which was the primary form of family organization among peoples in western and central Africa. By exploring slave trade data, I argue that 85% of slave imports to Virginia in the 18th century were from only four regions. Peoples from each region-the Igbo, the Akan, Bantu speakers from Angola and Congo, and the Mande from Senegambia-were marked by the prevalence of the extended family, the centrality of women, and flexible descent systems. I contend that these three cultural characteristics were transferred by slaves to Virginia. Runaway slave advertisements from the Virginia Gazette show the cultural makeup of slaves in eighteenth-century Virginia. I use these advertisements to illustrate the prevalence of vast inter-plantation webs of kin that pervaded plantation, county, and even state boundaries. Plantation records, on the other hand, are useful for tracking the development of extended families on a single plantation. William Massie's plantation Pharsalia, located in Nelson County, Virginia, is the focus of my study of intra-plantation webs of kin. Finally, I examine the years after the Civil War to illustrate that even under freedom, former slaves resorted to their extended families for support and survival. / Master of Arts

By tracing the history of Badagry, from its reconstruction after 1784 until its annexation in 1863, it is possible to trace a number of themes which have implications for the history of the whole 'Slave Coast' and beyond. The enormous impact of the environment in shaping this community and indeed its relations with other communities, plays a vital part in any understanding of the Badagry story. As a place of refuge, Badagry's foundation and subsequent history was shaped by a series of immigrant groups and individuals from Africa and Europe. Its position as an Atlantic and lagoonside port enabled this community to emerge as an important commercial and political force in coastal affairs. However, its very attractions also made it a desirable prize for African and European groups. Badagry's internal situation was equally paradoxical. The fragmented, competitive nature of its population resulted in a weakness of political authority, but also a remarkable flexibility which enabled the town to function politically and commercially in the face of intense internal and external pressures. It was ultimately the erosion of this tenuous balance which caused Badagry to fall into civil war. Conversely, a study of Badagry is vital for any understanding of these influential groups and states. The town's role as host to political refugees such as Adele, an exiled King of Lagos, and commercial refugees, such as the Dutch trader Hendrik Hertogh, had enormous repercussions for the whole area. Badagry's role as an initial point of contact for both the Sierra Leone community and Christianity in Nigeria has, until now, been almost wholly neglected. Furthermore, the port's relations with its latterly more famous neighbours, Lagos, Porto-Novo, Oyo, Dahomey and Abeokuta, sheds further light on the nature of these powers, notably the interdependence of these communities both politically and economically. Badagry's long-standing relationship with Europe and ultimate annexation by Britain is also an area which has been submerged within the Lagos story. But it is evident that the, annexation of Badagry in 1863 was a separate development, which provides further evidence on the nature of nineteenth century British imperialism on the West Coast of Africa.

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In this thesis we employ various mean-field approaches to study the shortrange interaction effects in topological insulators. We start with the Kane-Mele model on the decorated honeycomb lattice and study the stability of topological insulator phase against different perturbations. We establish an adiabatic connection between a noninteracting topological insulator and a strongly interacting spin liquid in its Majorana fermion representation. We use the Hartree-Fock mean-field approach, slave-rotor approach and slave-boson approach to study correlation effects related to topological insulators. With the spontaneous symmetry breaking mechanism, we can have an interaction driven topological insulator with extended Hubbard models on the kagome lattice and decorated honeycomb lattice. For the interplay among spin-orbit coupling, distortion and correlation effect in transition metal oxides, we use the slave-rotor mean-field approach to study its phase transition. We identify regimes where a strong topological Mott insulator and a weak topological insulator reside due to the strong Coulomb interaction and distortion. This is relevant to experiments with the transition metal oxides as they hold promise to realize topological insulators. To study the doping effects and a possible spin liquid in Kane-Mele-Hubbard model on the honeycomb lattice, we employ the slave-boson mean-field approach which is appropriate for the intermediate interaction strength. We compare our results with those obtained from other methods. / text

Orientador: Robert Wayne Andrew Slenes / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas / Made available in DSpace on 2018-08-24T11:29:51Z (GMT). No. of bitstreams: 1 Oliveira_JoiceFernandadeSouza_M.pdf: 2473436 bytes, checksum: 03e5d7b025649c7ca47c30e4a4507192 (MD5) Previous issue date: 2013 / Resumo: A pesquisa ora apresentada investiga a experiência de escravos comercializados para Campinas, no período de 1850-1888. Nesse estudo, as principais questões analisadas se referem às relações familiares, às relações de trabalho, à distribuição de ocupações especializadas, às incidências de fuga e às possibilidades de alforria. Para alcançar este objetivo, realizamos micro histórias de três comunidades escravas, utilizando o método de ligação nominativa de fontes para seguir pessoas no tempo e entre séries documentais diferentes. As três escravarias campineiras escolhidas se diferem a partir de seu histórico (se antigas ou de formação recente) e da "velocidade" de sua aquisição de novos cativos (lenta ou rápida) no comércio interno. Nesses cenários investigamos a comunidade escrava em sua totalidade, comparando a experiência de escravos residentes de longa com a vivência dos forasteiros. A partir desse trabalho observamos alguns traços comuns na trajetória dos forasteiros no novo cativeiro, mas principalmente, constatamos a heterogeneidade da experiência daqueles deslocados pelo comércio interno / Abstract: The research presented investigates the experience of bondspeople brought to the city of Campinas - a plantation center in the "historical West" of São Paulo - through the internal trade in slaves that grew rapidly after the end of the traffic in Africans (1850) and reached its height in the 1870s. My story finishes in 1888, the year of abolition. I focus my research on various aspects of slave experience - family relationships (especially marriage and baptism), labor relations, the distribution of specialized occupations, the incidence of flight and possibilities of manumissions - always contrasting the experiences of the descendants of the Africans "founders" of the slave quarters in the first half of the century, with the new "outsiders" post-1850. I construct "micro-histories" - of a small numbers of properties (three, ranging from old to "newly established"), using the method of nominative record-linkage to follow people over time and beteween different documentary series. From this work, I identify some common aspects in the trajectory of outsiders in the new captive, but mainly I apprehend the heterogeneity of experience of those displaced by the internal trade / Mestrado / Historia Social / Mestra em História