A multi-hop, amplify-and-forward (AF), cooperative diversity system with K relays is studied. An accurate approximate expression for the symbol-error-rate (SER) is derived for the multi-hop system. Also, a lower bound for the outage probability of the system, that is tight throughout nearly the entire signal-to-noise ratio (SNR) range, is presented. Neither an SER expression nor an outage probability expression had previously been reported in the literature for the multi-hop system. To assist in the derivation of the SER expression, the cumulative density function (CDF), probability density function (PDF), and moment generating function (MGF) are found for the random variable (RV), Z = X Y / (X + Y + c), where X and Y are RVs which have PDFs that are sums of terms of the form x^n exp(-b x). It is shown that with the CDF, PDF, and MGF of this type of RV, it is possible to derive an expression for the SER of the multi-hop system for several important scenarios with respect to what type of fading is present in the channels of the system. To assist in the derivation of the lower bound of the outage probability, the CDF is found for an interesting new RV, presented in a recursive formula, that is used to represent the upper bound of the instantaneous end-to-end SNR of the multi-hop system. These mathematical results are useful beyond the scope of the multi-hop system researched in this thesis. Also, many of the results found in this thesis for the previously-scarcely-studied multi- hop sytem are shown to be generalizations of results that had been found for the previously-often-studied two-hop, AF, cooperative diversity system with K relays. / Thesis (Master, Electrical & Computer Engineering) -- Queen's University, 2009-08-04 12:02:41.495

No description available.

This dissertation considers the evolution of Rap music and Hip Hop culture from the perspective of two spatial modalities. It first introduces theoretical concepts of geographic scale and the inscription of socio-spatial values in order to examine Rap and Hip Hop's geo-cultural expansions from their primary enclaves of urban black America. The dynamics between race, social space, and youth are assessed both individually and in tandem as crucial elements in the expression and practices of Hip Hop. The dissertation challenges and extends research in the prevailing Rap "canon" by analysing the processes and structuring logics through which Rap has been integrated into the commercial system of localized music scenes and transnational music and media industries. It identifies the myriad forces that have either facilitated or constrained Rap's expansion at various moments in its history. The dissertation also focuses on the emergence of a pronounced spatial discourse in Rap music and Hip Hop. It isolates the articulation of spatial issues and an increasingly urgent emphasis on sites of significance and the homeplace of "the 'hood" as a significant but characteristic element of the genre. The ancillary Hip Hop media, including radio, music videos, Rap press, and the cinematic "'Hood" genre, are examined as important factors in the reproduction of spatial sensibilities in Hip Hop culture.

Anthropologists have frequently used music in general and popular music in particular as a means to gain a perspective into everyday realities of young Africans lives. Attempting to place myself amongst this range of researchers, I use the position of Rwandan hip-hop as a point of departure to examine how young men in Kigali relate to and shape their realities in terms of politics, freedom of expression, and the creation of space and opportunities in the Rwandan society. My study is based on two and a half months of fieldwork in Kigali during the period between August and October of 2013. The empirical material upon which my arguments rely consists of interviews with young hip-hop Rwandans located in Kigali, who were almost exclusively male. It is also drawn from classical anthropological methods of participant observations and daily partaking in the lives of my informants. My analytical understanding of this material is mainly based upon notions of agency and structure, and contextualized within contemporary Africanist scholars’ research on modern music and youth. By looking at the historical context of Rwanda, the current state of youth in Kigali, and the contemporary atmosphere of politics and hip-hop music, I seek to understand the contradictive role of music as an arena for youth to express themselves. Through the stories of young hip-hop men, I describe and communicate their perceptions of constrains related to historical and socio-political sensitivities, feelings of fear connected to outspokenness, and alternative means to voice their opinions. I illustrate how these young men use innovative strategies and metaphorical language as a way to negotiate with some of these constrains as well as to influence each other and embody senses of oppositional opinions and collective empowerment. I also examine how national politics and governmental initiatives have increasingly become intertwined with the music and how it is trying to take advantage of its attractiveness as a youth medium. Ultimately, I discuss how the impact of Rwandan hip-hop can be seen as double-ended, serving the interests of both governmental policies and the youth who in different ways are trying to liberate themselves from political constrains, and how this affect the empowering potential of the music.

The development of Wireless Sensor Networks (WSNs) is enabled by the recent advances in wireless communication and sensing technologies. WSN have a wide range of scientific and commercial applications. In many applications the sensed data is useless if the location of the event is not associated with the data. Thus localization plays a substantial role in WSNs. Increased dependence on devices and sensed data presses for more efficient and accurate localization schemes. In many Internet of Things (IoT) deployments the area covered is large making it impossible to localize all devices and Sensor Networks (SNs) using single-hop localization techniques. A solution to this problem is to use a multi-hop localization technique to estimate devices' positions. In small areas SNs require at least three anchor nodes within their transmission range to estimate their location. Despite numerous existing localization techniques, the fundamental behavior of multi-hop localization is, as yet, not fully examined. Thus, we study the main characteristics of multi-hop localization and propose new solutions to enhance the performance of multi-hop localization techniques. We examine the assumptions in existing simulation models to build a more realistic simulation model, while studying and investigating the behavior of multi-hop localization techniques in large scale deployments before the actual deployment. We find that the introduced error follows the Gaussian distribution, but the estimated distance follows the Rayleigh distribution. We use the new simulation model to characterize the effect of hops on localization in both dense and sparse multi-hop deployments. We show that, contrary to common beliefs, in sparse deployments it is better to use long hops, while in dense deployments it is better to use short hops. Using short hops in dense deployments generates a large amount of traffic. Thus we propose a new solution which decreases and manages the overhead generated during the localization process. The proposed solution decreased the number of messages exchanged by almost 70% for DV-Distance and 55% for DV-Hop. Finally, we utilize mobile anchors instead of fixed anchors and propose a solution for the collinearity problem associated with the mobile anchor and use Kalman Filter (KF) to enhance the overall localization accuracy. Through simulation studies, we show that the scheme using a Kalman Filter decreases the estimation errors than using single direction by 31% and better than using weighted averages by 16% . As well, our new scheme overcomes the collinearity problem that appears from using mobile anchor nodes. / Thesis (Ph.D, Computing) -- Queen's University, 2014-04-30 01:53:55.817

In this study we will explore impact exposure to brands references in music videos may have on the development of consumers’ brand knowledge. We assert that an understanding of this relationship is a function of both executional elements of the message and the intervening effects of select individual-difference factors. This dissertation applies social cognitive theories, the cultivation hypothesis, attribution theory and the elaboration likelihood model to develop the set of hypotheses. This dissertation seeks to provide initial evidence regarding the key factors brand managers and music executives must be aware of when implementing music video brand placements. A conceptual model of music video brand placement is presented and evaluated utilizing qualitative and quantitative techniques. The qualitative methodology employs real music fans as informants and music videos as stimuli in developing an understanding of the relationship consumers have with music as well as their reactions to music videos. The quantitative methodology uses an original music video as the stimulus, real music fans as respondents and a real-time on-line survey to measure the relationship among the variables. Study findings support the ability of music videos to impact extra-musical consumption and provide early evidence regarding factors important to understanding consumers’ responses to music video brand placements.

The concept of style fusion for visual storytelling is introduced and applied in this research. Style fusion is the process of identifying two distinct styles as sources, which are from different artists or culture backgrounds, and applying features and visual symbols from both to develop a new style. As a proof of concept, the source performance styles selected for fusion are traditional Chinese Beijing opera and hip hop. A set of guidelines for this style fusion are developed after an analysis of the visual symbols of each source style. A character and an environment design fusion are done based on these guidelines. Finally, the style fusion is visualized using 3D models.

No description available.

Thesis (Ed. D.)--University of Missouri-Columbia, 2007. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on month day year) Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Austin, 2008. / Vita. Includes bibliographical references.