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Taylor, Randy Lyle. "Radio networks and the redefinition of local private radio." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0001/MQ37643.pdf.
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Saffran, Michael J. "Effects of local-market radio ownership concentration on radio localism, the public interest, and listener opinions and use of local radio /." Online version of thesis, 2008. http://hdl.handle.net/1850/7105.
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Mauch, Thomas. "Radio Sources in the Local Universe." University of Sydney, 2006. http://hdl.handle.net/2123/928.
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Doctor of Philosophy<br>This thesis presents a census of radio sources selected from the NRAO (National Radio Astronomy Observatory) VLA (Very Large Array) Sky Survey (NVSS) and Sydney University Molonglo Sky Survey (SUMSS) catalogues which have also been observed in the first data release of the 6 degree Field Galaxy Survey (6dFGS), a galaxy redshift survey of the local universe. Radio detections were found for 4,506 galaxies in the 6dFGS near-infrared-selected primary sample, a radio detection rate of 16%. A further 1,196 radio sources were observed by 6dF which were missing from the 6dFGS primary sample either because their host galaxies were too blue in colour or they appeared stellar on optical plates. The full sample comprises the largest and most homogeneous set of spectra and redshifts of radio sources in the local universe ever obtained. Results from the study of these objects form an accurate benchmark from which their cosmic evolution may be understood. 6dF spectra of galaxies have been used to determine the physical cause of radio emission from each object as either star formation or an active galactic nucleus powered by a super-massive black hole. These two classes of radio source have been characterised via a determination of the local radio luminosity function at 1.4 GHz; plotting the variation in their space density with luminosity. The star-formation density of the universe at the present epoch has been determined, the value of which which turns out to be in excellent agreement with previously published values. Fractional luminosity functions have also been determined showing that more massive galaxies have higher star-formation rates and are more likely to host a radio-loud AGN. The large-scale structure of star-forming galaxies and radio-loud AGN in the local universe has been studied by determining their clustering properties via the two-point correlation function. Radio-loud AGN are found to cluster more strongly than star-forming galaxies confirming that these objects are biased tracers of the underlying matter distribution. Both star-forming galaxies and AGNs cluster similarly to the underlying host galaxy population in which they reside. This thesis also describes the 843 MHz SUMSS catalogue, made by fitting elliptical Gaussians to sources in images. The catalogue contains radio sources to a limiting peak brightness of 6 mJy/beam at declination less than -50 degrees and 10 mJy/beam at declination greater than -50 degrees. Image artefacts have been classified using a novel technique involving a decision tree, which correctly identifies and rejects spurious sources in over 96% of cases and has ensured the catalogue is more than 95% complete and 90% reliable over most of its flux density range.
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Doerr, C. "Local control of cognitive radio networks." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337087.
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Sanders, Tyrone. "American local radio journalism : a public interest channel in crisis /." Connect to title online (Scholars' Bank) Connect to title online (ProQuest), 2008. http://hdl.handle.net/1794/7507.
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Thesis (Ph. D.)--University of Oregon, 2008.<br>Typescript. Includes vita and abstract. "The study documents the news operations of four different types of ownership structures within a single radio market, Salt Lake City, Utah"--P. v. Includes bibliographical references (leaves 218-229). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.
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Pobst, James Herbert Hayes Joy Elizabeth. "Celebrating the chaos a local re-examining of early U.S. radio regulation /." Iowa City : University of Iowa, 2009. http://ir.uiowa.edu/etd/422.
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Silva, Guzmán Claudia Magdalena. "Radio comunitaria e identidad local: el caso de radio konciencia en Rosario, Comuna de Rengo." Tesis, Universidad de Chile, 2013. http://www.repositorio.uchile.cl/handle/2250/130184.
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Antropóloga Social<br>En la presente investigación exploratoria descriptiva, se plantea la importancia de estudiar la relación radio comunitaria – identidad, desde la perspectiva de las mediaciones sociales y culturales, utilizando principalmente el aparataje teórico de Jesús Martín-Barbero. Este paradigma de comprensión actual, nos permitirá conocer las relaciones que se entretejen entre las “lógicas productivas” de los radialistas y las “lógicas de los usos” de sus radioescuchas, las cuales nos llevarán a analizar el tipo de identidades que la radio comunitaria pone en escena y activa, así como la importancia de la dimensión local en el estudio de estas.
El caso de estudio seleccionado corresponde a la radio comunitaria Konciencia, ubicada en la localidad de Rosario, comuna de Rengo, la cual posee un discurso crítico y propositivo sobre los temas que aquejan a su territorio, y cuenta con una alta participación ciudadana. Se utilizó un enfoque cualitativo etnográfico y contextual, haciendo uso de observación participante y de entrevistas semiestructuradas, también se recurrió a información municipal y fuentes históricas. A partir de estas estrategias, se realizó la caracterización de la localidad, de la práctica de los radialistas y de las prácticas de los radioescuchas, lo cual nos llevó a identificar un discurso aglutinador de identidades que dentro de la diversidad de gustos e intereses, recurre a lo local como referente de identificación
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Allen, D. P. "Independent Local Radio (ILR) in the West Midlands, 1972-1984 : a comparative study of BRMB Radio and Beacon Radio." Thesis, University of Worcester, 2011. http://eprints.worc.ac.uk/1430/.
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Informed by theory and debate associated with the field of media studies, this thesis presents a comparative analysis of two Independent Local Radio (ILR) stations in the West Midlands between 1972 and the mid 1980s: BRMB Radio in Birmingham and Beacon Radio, which served Wolverhampton and the Black Country. It locates the two stations in the context of the development of British broadcasting policy, which had been shaped from the start by the British model of public service broadcasting. ILR was a public radio service which was funded by the sale of advertising time. Similar to commercial radio elsewhere, the survival of BRMB and Beacon Radio depended on the income they could generate, but the commercial imperative was constrained by the legislative and regulatory framework of British public service broadcasting. The thesis argues that the fortunes of the two stations depended largely on the approaches taken by their respective management teams to these conflicting influences. The success or failure of an ILR station, in terms of profit or programming, was shaped by its management team. BRMB Radio was an example of a station with an appropriate balance of experience and expertise. From the beginning it was headed by a managing director with a commercial background and a programme controller who was experienced in regulated public service broadcasting. In contrast, Beacon Radio was a station with the wrong people in charge. Both the managing director and the programme controller were from a commercial broadcasting background, and their approach brought the station into conflict with the Independent Broadcasting Authority, ILR‟s regulator. Almost every aspect of the Beacon operation was designed to make money. The profit motive took precedence over the fulfilment of its public service obligations. Beacon‟s deficiencies in terms of local coverage and its aggressive sales tactics caused some parts of the local community to reject the station, with some calling on the IBA to remove the Beacon licence. Formulating the correct type of programmes and working with the regulator was a necessity. To generate revenue a station needed to sell an audience to advertisers. To build an audience it had to create programming to which listeners could relate. Music policy, the personality of presenters, and predictability of output were specifically relevant to BRMB and Beacon. Above all, each station had to have access to the airwaves, and with the IBA as gatekeeper to the airwaves it had to abide by its rules and regulations, especially those relating to programming and content. This was exemplified by the case of Beacon Radio: it was only after the IBA had refused to renew its licence that Beacon recognised the importance of having programmes which met the prescribed standard of quality and public service, and working with the regulator and not against it.
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Muriithi, Ndiritu. "Radio local area networks : protocol design and performance analysis." Thesis, University of York, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296384.
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Sanders, Tyrone 1951. "American local radio journalism: A public interest channel in crisis." Thesis, University of Oregon, 2008. http://hdl.handle.net/1794/7507.
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xiii, 229 p. : ill. A print copy of this title is available from the UO Libraries, under the call number: KNIGHT PN4888.R33 S26 2008<br>This study looks at the status of local radio news in the United States in light of changes in policy, economics, production and distribution technology and the dynamic media environment. It examines how differences in ownership relate to the amount of news programming offered on local stations, how those stations are staffed and the working conditions for today's radio journalists. Two areas of communication theory provide the basis for the study, Political Economy of Communication and Localism. Both offer excellent perspectives for studying the radio broadcasting industry and the people who work in it. Political economy allows the study to look closely at the impact of ownership in our capitalist society, how government regulates ownership and programming, how those factors affect the working conditions for journalists and how they ultimately impact the public interest. Political economy is a holistic approach that also calls upon us to consider a moral philosophy and make recommendations for the good of society. Localism is a long-held policy objective of the Federal Communications Commission that has been a part of the regulatory process relating to ownership and programming of news and public affairs throughout the existence of radio in the United States.
Using a triangulation of both quantitative and qualitative methods, the study documents the news operations of four different types of ownership structures within a single radio market, Salt Lake City, Utah. The primary quantitative method used content analysis to examine a sample of 255 hours of radio programming across the ownership groups. Qualitative methods of in-depth interviews and observation were used to examine how the stations were staffed, the working conditions for local journalists and how the news programming is produced.
The study found the overall amount of local radio news programming to be low, with locally owned stations generally producing more news then those with large, outside corporate ownership. It also found working conditions to vary greatly among ownership groups. Local owners tended to be much more supportive of local journalists and provide better conditions for the production and programming of local radio news.<br>Adviser: Alan G. Stavitsky
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Linfoot, Matthew. "A history of BBC local radio in England, c1960-1980." Thesis, University of Westminster, 2011. https://westminsterresearch.westminster.ac.uk/item/8zz18/a-history-of-bbc-local-radio-in-england-c1960-1980.
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The story of BBC Local Radio in England, from the days of its conception around 1960, through to the launch of the first stations in 1967 and the finalisation of how to complete the chain in 1980 is a neglected area of research in media history. This thesis tells this story, using previously undocumented research from the BBC Written Archive Centre, and supplemented by oral history interviews with key participants. The approach is multi-faceted. Part of the investigation lies in gaining a greater understanding of how the BBC operated as an institution during these years. The internal culture of the BBC presents a series of complex issues, and the evolution of local radio illustrates this in many ways, in matters concerning management, autonomy, technology, the audience and finance. Linked to this are the differing notions and definitions of what „local‟ meant, in terms of the original concept and the output in practice. For local radio, this had a crucial impact on station location, the size of the transmission area and the degree to which the stations were able to represent and embody their communities. This history also assesses the impact the stations made, often in contrast to the popular image and perception of local broadcasting. The original contribution to knowledge that this thesis makes is in narrating this history for the first time, and in doing so, challenging previous assumptions about the nature of local broadcasting as part of the BBC and as part of the wider community.
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Harrison, S. M. "Radio frequency design issues for a broadband local area network." Thesis, University of Sussex, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375840.
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Feuerstein, Martin Jay. "Performance evaluation of a spread spectrum local area position location system /." This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08082007-105749/.
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Sabés, Turmo Fernando. "La radio y la televisión local en el marco del sistema audiovisual aragonés." Doctoral thesis, Universitat Autònoma de Barcelona, 2002. http://hdl.handle.net/10803/4102.
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La radio y la televisión local en el marco del sistema audiovisual aragonés es una tesis que se centra en el análisis pormenorizado de la situación actual de estos dos medios en Aragón desde un punto de vista científico. El estudio de la programación de los diferentes operadores locales es el principal objetivo establecido.<br/>El trabajo se basa en el análisis de la comunicación local audiovisual en esta región por lo que el primer aspecto que abordamos fue la definición de lo que se entiende por comunicación local. Sobre este término muchos son los autores que están aportando ideas en la actualidad, sobre todo, poniéndolo en relación a la globalización que se está produciendo en todos los ámbitos y también en el de la comunicación. Finalmente, incorporamos una definición de comunicación local que se centraba en la combinación de dos variables: el ámbito de cobertura y la aportación de contenidos de proximidad.<br/>Una vez delimitado qué entendemos como medios de comunicación local, describimos la evolución de la radio y la televisión en Aragón en función de dos aspectos: el histórico y el legislativo. Este capítulo permite conocer el porqué de la conformación de un sistema radio-televisivo tan peculiar como es el aragonés. Uno de los aspectos que se abordan con mayor detenimiento es el fracaso de la puesta en marcha de la Radio Televisión Autonómica Pública.<br/>En el marco teórico que desarrollamos, diseñamos una metodología de análisis de contenidos con el fin de estudiar, de forma pormenorizada, la programación ofrecida por los medios locales audiovisuales. Este método consiste en la combinación de cinco variables: macrocontenidos (grandes bloques temáticos), géneros (forma de transmisión de los macrocontenidos), contenidos (materias abordadas), temas (delimitación de los contenidos) y ámbito espacial (área geográfica en la que se circunscriben los contenidos).<br/>En el experimento práctico dividimos la radio y la televisión en diversos tipos. En cuanto al primer medio observamos tres grupos diferenciados en función de su programación (las generalistas con desconexión, las especializadas y las mixtas) y uno en relación a su propiedad (emisoras de los ayuntamientos). Por lo que respecta a la televisión, solamente observamos dos modelos de redes: las generalistas con desconexión y las locales con programación de proximidad.<br/>En las conclusiones, una vez validadas las tres hipótesis que formulamos al comienzo de la tesis, esbozamos una propuesta que tiene como objetivo mejorar la situación de la comunicación local en Aragón y que consiste en crear un medio público de radio y televisión dependiente del Gobierno Autonómico, aunque basado en la alianza entre las radios y las televisiones locales públicas ya existentes. Tampoco renunciamos a la implicación de empresas privadas.<br>The local radio and the television in the mark of the Aragonese audiovisual system is a thesis that is centered on the itemized analysis of the current situation of these two media in Aragon from a scientific point of view. The study of the programming of the different local operators is the main objective established. <br/>The work is based on the analysis of the audiovisual local communication in this region. Then, the first aspect that we approach was the definition of what we understand as local communication. About this term there are many authors who are contributing ideas at the present time, putting them in relation with the globalization that is suffering in all the environment and also in the communication. Finally, we have incorporated a definition of local communication that was centered in the combination of two variables: the covering environment and the contribution of contents of vicinity. <br/>Once we defined what understand as local media, we can now describe the evolution of the radio and the television in Aragon in function of two aspects: the historical and the legislative. This chapter allows to know the reason for the conformation of such a peculiar radio-television system as the aragonese. One of the aspects that is approached with more thoroughness is the failure of the setting up in march of the Public and Autonomous Radio and Television. <br/>In the theoretical mark that we have developed, we have designed an analysis methodology of contents with the purpose of studying, in an itemized way, the programming offered by the audiovisual local channels means. This method consists of the combination of five variables: large-contents (large thematic blocks), genre (form of transmission of the big-contents), contents (approached issues), issues (delimitation of the contents) and space environment (geographical area in which the contents are bound). <br/>In the practical experiment we divide the radio and the television into different types. As for the first one, we can see three different groups in function of their programming (the conventional with disconnection, the specialized, and the mixed one) and one in relation to their property (radio stations from the city councils). As to television, we only observe two models of networks: the conventional with disconnection and the local with programming of vicinity. <br/>In the conclusions, once validated the three hypotheses that we formulated at the beginning of the thesis, I would like to put forward with the sole purpose of improving the situation of the local communication in Aragon and it consists of creating a public media of radio and television dependent on the Autonomous Government, but it should be based on the alliance between public radio stations and the existing television networks. We should look for the implication of private companies.
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Pobst, James Herbert. "Celebrating the chaos: a local re-examining of early U.S. radio regulation." Diss., University of Iowa, 2009. https://ir.uiowa.edu/etd/422.
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This dissertation re-examines a particular period of American broadcasting regulation in the 1920s, namely the "chaos" period traditionally labeled as the brief time in between the breakdown of federal radio regulation in early 1926 and the passage of the Radio Act of 1927. Using the ideas of heteroglossia and vernacular discourse drawn respectively from Mikhail Bakhtin and Gerard Hauser, I argue that the media scholarship understanding of chaos needs to be expanded beyond the conventional interpretation of a fatalistic moment which inevitably resulted in the support for broadcast commercialization on a national scale. This theoretical expansion reflects three trends that can be studied in this period: several years of uncertainty in regulatory decision-making, the attempted emergence of a greater variety of stations, and a substantive public debate about the direction of regulation towards commercialization. Chaos can ultimately be looked at as a positive term with ties to the traditional ideal of public interest in broadcasting.
I explore three levels and local examples of public discourse to make this argument about chaos, in the process concentrating on Chicago area stations, in particular WCFL and WJAZ, and their experiences during this period. First of all, congressional records of debate over radio regulation as well as the early actions of the Federal Radio Commission establish a level of governmental discourse that struggled to rationalize the elimination of stations towards network commercialization. Second, trade journals such as Radio Broadcast reflect a level of public discourse in close collaboration with regulators, but also reflective of listener voices resistant to the predominance of big commercial stations. Thirdly, WCFL programming, as characterized differently by both Chicago newspaper accounts and station literature, is regarded as contemporary evidence of the heteroglossic and vernacular quality of local broadcasting in urban environments, to be affected negatively by the regulatory turn towards the networks. Re-exploring this period with a more positive evaluation of "chaos," however, can aid scholars in drawing on historical support for media reform movements in an ever-changing communication environment.
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Maqina, Bandile Chumani. "Impact of an increase of the local content quota on radio broadcasters." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020594.
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With the ever growing disenfranchisement of musicians and artist in the in ability of government entities to enforce stricter and favourable music quota which aim to increase the consumption of local music by increasing the current music quota as it stands from 25 percent to at least 60 percent for commercial radio, with more and more musicians calling for an increase in the current quota. In an open letter to the then Minister of Arts and Culture, Mr Pallo Jordan from the South African Music Quota Committee (SAMQC) (Oct 2007) they voiced their concerns: “The SA content quota of 25 percent for commercial radio is not only too low, it is also often meaningless, because The Independent Communications Authority of South Africa (ICASA) allows stations to include gig guides, interviews and promotions as part of their local quota. You state, and we agree, that “cultural industries are serious business”. The structures protecting the national interest in iron, minerals, fishing, sport and many other areas are strongly enforced and defended here in South Africa. Why not our music?” More initiatives such as the “Play Local of Die” campaign whose aim is to urge commercial broadcasters to increase their local content with regards to commercial radios stations playlist was launched by South African Hip Hop artist commonly known as JR (Real Name: JR Bogopa) to further exhibit the South African musicians plight in how pivotal it is to their careers and overall financial well-being that the current quota be raised significantly. The aim of this study was to investigate the impact of local content quota on domestic radio broadcasters in South Africa. The population for this study included 100 radio station which broadcast in the republic of South Africa. The response rate for the e-mail questionnaire was 100 percent of the 100 respondents. A Likert-type scale instrument consisted of 39 questions divided into two sections: Section one looked at the demographic profile of the respondents and section two focused on getting responses on the factors impacting local content quotaand domestic broadcasters, namely local content quota, implications for domestic broadcasters, revenue streams, impact on local musicians, governments role in local content quota, success factors, globalisation and piracy. In order to realise the purpose of this study, the following research design was used: Step 1 A literature review was conducted to determine the various factors impacting local artists, local broadcasters and local content quota. Step 2 A questionnaire was composed according to the principles and guidelines in steps 1. Step 3 Empirical data was obtained with the aid of an e-mail survey. Step 4 The results of the data were analysed and interpreted. Step 5 The empirical results were integrated with Step 3. Step 6 Conclusions and recommendations were completed. The main findings from the study were: The study revealed that the radio industry is not unanimous in the call from artists for government to increase the local content quota and thus prefer that the current status quo continue. That local content quota are not the only way to curb the South African music industry‟s woes, artists should seek to maximise their revenue by exploiting the infinite avenues for revenue that globalisation avails.
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Mjeku, Majlinda. "Protocol performance of radio-over-fibre based wireless local area networks." Thesis, University of Kent, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500664.
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Radio over Fibre (RoF) is being considered for indoor and outdoor distributed antenna systems for the support of IEEE 802.11 wireless networks. The 802.11 Medium Access Control (MAC) protocol, however, has not been designed to account for the optical distribution network. The research work presented in this thesis has focused on the analysis of protocol effects in 802.11 over fibre networks and the application of new features in order to improve the protocol's performance. This study is based on numerical analysis, supported in part by analytical approximations, and experimental measurements.
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Cassano, Giuliana. "Otras voces, otras imágenes: radio y televisión local en el Perú." La Mirada de Telemo, 2011. http://repositorio.pucp.edu.pe/index//handle/123456789/20370.
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Lima parece ser la gran productora de programas de radio y de televisión para el Perú. Desde la capital se genera y se emite para todo el país, y en ella se observa y escucha la producción que ella misma realiza. Esta afirmación que subraya la mirada absolutamente centralista y centralizada de nuestra capital, esconde y se vuelve ciega a toda la producción que se hace y emite más allá de los canales más grandes de difusión.
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Siamarou, Andreas G. "Wireless local area radio networks : wideband characterisation and measurements at 62.4GHz." Thesis, University of South Wales, 2001. https://pure.southwales.ac.uk/en/studentthesis/wireless-local-area-radio-networks-wideband-characterisation-and-measurements-at-624ghz(025994b7-9a26-4ad2-9137-7946069d6900).html.
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The presence of multipath propagation in indoor environments limits the performance of wideband radio communication systems and also the maximum data rate that can be feasible. This thesis addresses the dynamics of propagation mechanisms needed to design and exploit future broadband wireless local area networks in the 60GHz millimetre-wave band. The frequency band between 62-63GHz with data rates up to 155Mb/s, has been provisionally assigned for Mobile Broadband Systems. The main emphasis of this study was to provide an original contribution to the development, design and planning of future broadband communication systems using new high-resolution wideband channel measurement data. Based on this data, spatial and temporal statistics of several line-of-sight radio paths in a University campus are presented and analysed. In order to enable measurement of the wideband propagation characteristics a high-resolution (Ins) wideband Frequency-swept channel sounder was designed and implemented at 62.4GHz. The channel sounder has been built around a Vector Network Analyser to measure the complex transfer function of the channel. The instantaneous coherence bandwidth is found to be highly variable with the location of the receiver with respect to the base station. With delay spread values ranging from 20 to 70ns the coherence bandwidth remains most of the times below 10MHz. Based on the maximum delay spread of 68ns obtained in a 41m long narrow corridor, a BER of 10" 3 and normalised delay spread of 0.1, the minimum data transmission rate is estimated at 1.47 Mb/s. For a 12.80m room environment with maximum delay spread of 20ns the minimum data transmission rate is 5Mb/s. To achieve higher data transmission rates channel protection countermeasures appears to be necessary. However limiting the extent of a picocell size and utilising the potential capability of frequency re-use at 62.4GHz can result in radio network implementation without the complexity of countermeasures. Results relating to coherence bandwidth variability in multipath conditions confirm that higher user mobility envisaged for MBS would present a real challenge to the achievement of data transmission rates of the order of 155Mb/s. The research work reported in the thesis has been able to identify and extract from extensive high resolution wideband propagation the necessary design characteristics for the development of realistic radio planning models. Using measured results obtained in a number of radio paths geometries, the objectives of the project have been largely achieved and further work is recommended.
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Zakariah, Adam Tanko. "Assessing the potential of local radio for agricultural communication in Ghana." Thesis, University of Leicester, 2008. http://hdl.handle.net/2381/30574.
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This study investigated the potential of local radio as a source of agricultural communication in Ghana. The main thrust of the research was to investigate the levels of unaided recall and comprehension of agricultural radio messages among rural farmers. Eight experiments were conducted in eight rural communities. In all, 252 farmers were used as subjects for the experiments. The experiments investigated the effects of specific production and audience factors on unaided recall and message understanding. The survey involved the use of questionnaires to gather data through interviews with 365 farmers. Survey methodology was used to profile rural radio listeners in Ghana; and to glean insights into the sources of general and agricultural news for rural farmers, the farmers' radio listening behaviours, radio programme format preferences, and their levels of adoption of radio agricultural messages. Unaided recall and comprehension of broadcast news were found to be generally low. Two programming variables --- recaps of news items and repeat broadcasts --- demonstrated significant impact on farmers' recall and comprehension of radio agricultural messages. Item duration was found to be very potent in influencing memory recall. Younger farmers recorded significantly higher unaided recall and comprehension scores than older farmers; and farmers with higher education performed better in free recall and comprehension of broadcast messages than those with lower levels of education. The study found that radio is the most popular source of general and agricultural news to farmers. The farmers relied mostly on radio, extension agents and interpersonal communication for agricultural information. While the farmers reported that the extension agent was the most credible among all the sources of agricultural communication, they rated radio as the most reliable.
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Barboutis, Christos. "The meaning of the 'local' : a study of production and audiences in local radio broadcasting in Crete." Thesis, University of Westminster, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434265.
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Wong, Oiwei Ivy. "Star formation and galaxy evolution of the local universe based on HIPASS /." Connect to thesis, 2007. http://eprints.unimelb.edu.au/archive/00004069.
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Grierson, John Robert. "Local and community radio in Cornwall : testing achievements against obligations and objectives." Thesis, University of the Arts London, 2016. http://ualresearchonline.arts.ac.uk/13331/.
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In a time of shifting technological, regulatory and economic regimes, and debate as to the present and potential uses of media, this thesis offers radio practitioners and students a pragmatic, rather than a highly theorised, enquiry into the notion and value of local radio. In a detailed case study, it uses the chosen stations as the basis for an empirical examination of actual output, and demonstrates comparisons between objectives and achievement against the background of regulatory and self-reflective constraints, and within geographical and technological contexts. This thesis also challenges some common assumptions about localness in quasi-local radio and provides a detailed insight into the perceptions of a number of managers about local and community radio stations. This is a qualitative study, focusing on broadcaster-output rather than on listener perception. The enquiry takes the form of a case study of “local” radio in the south-west of Cornwall, UK, by examining examples of the three tiers of radio: BBC Public Service, Commercial and Community Radio respectively. Methodologically, background factors are first assessed by interrogating literature covering local radio in the digital age; the nature of locality and localness; the notion of community; and the role of commercialism in local radio. The research, centered in particular upon notions of localness and community, interrogates those terms for meaning and relevance. A detailed review follows, looking at the formal obligations imposed on each tier and each station (a) by broadcast licences and (b) by self-reflective aims and objectives. Field research then employs observation and full-day, annotated audio monitoring, leading to detailed analytical comparisons of the extent to which the stations rise to the challenges posed. Aspects of typicality and representative sampling are addressed, to ensure that the results obtained through field-research methodology are reliable and repeatable. Conclusions on the specific issue of compliance produce a mixed picture, with all stations complying to a greater or lesser extent with regulatory licence conditions while some appear to fall short of fulfilling their own objectives. Other conclusions on comparative operational and management issues are equally varied but equally worth perusal.
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Durgin, Gregory David. "Theory of Stochastic Local Area Channel Modeling for Wireless Communications." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29843.
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This dissertation outlines work accomplished in the pursuit of this degree. This report is also designed to be a general introduction to the concepts and techniques of small-scale radio channel modeling. At the present time, there does not exist a comprehensive introduction and overview of basic concepts in this field. Furthermore, as the wireless industry continues to mature and develop technology, the need is now greater than ever for more sophisticated channel modeling research.
Each chapter of this preliminary report is, in itself, a stand-alone topic in channel modeling theory. Culled from original reports and journal papers, each chapter makes a unique contribution to the field of channel modeling. Original contributions in this report include:
1. joint characterization of time-varying, space-varying, and frequency-varying channels under the rubric of duality
2. rules and definitions for constructing channel models that solve Maxwell's equations
3. overview of probability density functions that describe random small-scale fading
4. techniques for modeling a small-scale radio channel using an angle spectrum
5. overview of techniques for describing fading statistics in wireless channels
6. results from a wideband spatio-temporal measurement campaign
Together, the chapters provide a cohesive overview of basic principles. The discussion of the wideband spatio-temporal measurement campaign at 1920 MHz makes an excellent case study in applied channel modeling and ties together much of the theory developed in this dissertation.<br>Ph. D.
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Mohamed, Yazan Adnan Ahmad. "A novel resource allocation scheme for ad hoc radio local area networks." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267608.
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Tran, Kim J. "A ring model for local/mobile radio communications with correct packet capture." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/27243.
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Approved for public release; distribution is unlimited<br>Researchers and scientists have been studying Aloha networks for many years hoping to improve the channel throughput and overcome the inherent instability. In this study, we are going to describe some of the Aloha network features. An application of the slotted Aloha network is considered for local/mobile radio communications. The near/far effect, Rayleigh fading, and shadow fading arise in local/mobile radio communications due to differences in distances and topography between each of the users and the base station. These various effects cause a packet capture effect which improves overall channel throughput but leads to different packet delay times for the various users. An analysis of a ring model for local/mobile radio communications with correct packet capture is considered in this paper. The correct packet capture effect of one-ring and three-ring networks are studied. A Markov model is developed for a slotted Aloha network with capture. It is shown that the throughput in such a network is markedly greater than the standard 1/e. Perhaps even more important is the result that such networks are more stable under overload. .
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Banh, Dennis V. "A ring model for local mobile radio communications with variable packet length." Thesis, Monterey, California: Naval Postgraduate School, 1990. http://hdl.handle.net/10945/27549.
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Approved for public release; distribution unlimited.<br>This thesis presents an analysis of the performance of a local mobile radio communications system utilizing the Aloha random access protocol with variable length packets. The capture phenomenon due to the nearfar effect that enhances the performance of the system is investigated. A tagged packet will capture the base station if its signal-to-interference ratio exceeds a threshold gamma sub zero. Because of the nearfar effect, users near the base station typically have a stronger signal than those farther away. A multiple ring model is used to alleviate this problem. Users in one ring employ different retransmission strategy from those in other rings. A shorter retransmission delay is allocated to users in rings farther from the base station than those closer to the base station in order to achieve approximately the same average delay throughout the network regardless of location.
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Molina, Víctor Manuel. "Radio Nacional Mendoza como medio estatal y difusor de la cultura local." Bachelor's thesis, Universidad Nacional de Cuyo. Facultad de Ciencias Políticas y Sociales, 2014. http://bdigital.uncu.edu.ar/6497.
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El desarrollo de este trabajo se plantea con cinco capítulos, en los cuales se abordan aspectos de Radio Nacional Mendoza en relación con la cultura local.
El capítulo 1 tratará a Radio Nacional Mendoza en sus aspectos superficiales, aquellos que
permiten el primer contacto con el medio, por lo tanto, qué información es más accesible y cómo
influye esto en la relación con la comunidad cercana a la radio.
En el segundo capítulo el aspecto elegido es el discurso y la construcción simbólica, que se difunde y propone el medio, cómo se entiende la comunicación, a quién se dirige el mensaje y de qué manera.
El capitulo 3 se enfoca en la nueva ley de medios audiovisuales y su influencia en Radio Nacional
Mendoza, la evaluación de los conceptos de público y estatal, una definición de estado y
diferencias entre el funcionamiento de los medios de comunicación privados y sin fines de lucro.
En cuarto lugar se analiza a Radio Nacional Mendoza como un espacio de poder en disputa, ¿Cómo es la relación del público con lo público? ¿Los medios del estado son medios del gobierno?
¿Tienen poder los medios de comunicación, cómo lo ejercen? Son algunas de las preguntas
disparadoras, en relación con el poder y la disputa por él.
En el último capítulo se ofrece lo relevado (entrevistas, bibliografía, recorrido del espacio físico del
medio, etc.) y los aportes que se proponen, en pos de un medio público mucho más
comprometido, con la comunidad que la contiene, y en este sentido con la difusión de la cultura
local.<br>Fil: Molina, Víctor Manuel. Universidad Nacional de Cuyo. Facultad de Ciencias Políticas y Sociales.
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Jones, Richard Earl. "Keep it Local: Music Streaming & Local Music Communities." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami1512137210213619.
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Chavannes, Nicolas Pierre. "Local mesh refinement algorithms for enhanced modeling capabilities in the FDTD method /." Konstanz : Hartung-Gorre, 2002. http://www.loc.gov/catdir/toc/fy0801/2006483066.html.
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Matusse, Renato. "Language policies and practices in Mozambique : the case of the Changana/Ronga radio journalists." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285797.
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Avrella, Bárbara. "O radiojornalismo local em pequenas emissoras." reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/129118.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Jornalismo<br>Made available in DSpace on 2015-02-05T20:43:04Z (GMT). No. of bitstreams: 1
328999.pdf: 3290199 bytes, checksum: 2279a0072073ccef612d67705d61b1e2 (MD5)
Previous issue date: 2014<br>O rádio é considerado um meio de veiculação de informação especialmente local, sobretudo, nas pequenas e médias emissoras. Isso por conta, basicamente, de algumas de suas características e potencialidades de atendimento às necessidades informativas da sua audiência - aquela situada na área onde a estação de rádio está instalada e de onde transmite -, como a prestação de serviços, a utilidade pública e a facilidade de produção local e regional. Entretanto, o cenário atual da comunicação nos remete à expansão do rádio global, com o desenvolvimento e fortalecimento das redes radiofônicas e o uso da internet como fonte de pauta e captação jornalística. Hoje, o local e global dividem espaço nas ondas do rádio, trazendo reflexos na produção e programação radiojornalística das pequenas emissoras, voltadas à cobertura de fatos de âmbito local e regional. Focado nesta questão, este estudo tem como objeto de pesquisa o radiojornalismo local em pequenas emissoras, com ênfase na análise da produção e programação radiojornalísticas de duas estações do noroeste do Rio Grande do Sul: Luz e Alegria AM, de Frederico Westphalen, e Seberi AM, de Seberi. Inicialmente, trazemos reflexões acerca da trajetória histórica do radiojornalismo, com o intuito de melhor compreendermos o desenvolvimento das práticas produtivas e suas consequências para a programação radiojornalística. Prosseguimos com uma discussão a respeito do radiojornalismo local na atualidade, evidenciando a internet e as redes radiofônicas como as principais fontes de captação de informações globalizadas. Como metodologia, utilizamos a abordagem do newsmaking, que foca na rotina produtiva do jornalismo. Para tanto, analisamos uma semana de produção e programação radiojornalísticas para cada emissora, entre novembro de 2013 e janeiro de 2014. Os resultados obtidos indicam que as emissoras têm a produção e programação voltadas para o âmbito local e regional, no entanto, com conteúdos originários de diversas fontes de captação.<br><br>Abstract: Radio is considered a media of broadcast, especially of local information, principally in the small and medium radios. By this account, basically, some of its features and capabilities of meeting the information needs of its audience - that located in the area where the radio station is installed and which transmits - such as the provision of services, the public utility and ease local and regional production. However, the current scenario of communication lead us to the expansion of global radio, with the development and strengthening of radio networks and the use of the internet as a source of journalistic guidelines and captation. Today, the local and global share space on the airwaves, bringing radiojournalism reflexes in the production and programming of small stations, aimed at the coverage of local events and regional levels. Focused on this issue, this paper has local radio journalism in small stations as object of research, with emphasis on the analysis of production and programming journalistic of two stations of northwestern Rio Grande do Sul: Luz e Alegria AM, of Frederico Westphalen, and Seberi AM, of Seberi. Initially, we bring reflections about historical trajectory of radio journalism, in order to better understand the development of productive practices and their consequences for programming journalistic. We continue with a discussion concerning the local radio journalism today, highlighting the internet and radio networks as the main sources of globalized information. The methodology used was newsmaking's approach, which focuses on the production routines of journalism. To this end, we analyze a week of production and programming journalistics for each station, between November 2013 and January 2014. Results indicate that broadcasters have the production and programming aimed at local and regional level, however, with content originating various sources of funding.
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Lorite, Nicolàs. "Dinamización Social y Radio Municipal." Doctoral thesis, Universitat Autònoma de Barcelona, 1992. http://hdl.handle.net/10803/4139.
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Feuerstein, Martin J. "Performance evaluation of a spread spectrum local area position location system." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/39073.
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The primary objective of this research was the investigation of position location technologies suitable for use in construction automation applications. Ground based radio frequency spread spectrum techniques were chosen due to their relatively low cost, ease of implementation, and all weather capability. Two types of spectral spreading were examined: frequency hopping and direct sequence. The error performance capabilities of spread spectrum position location systems were studied systematically through theoretical analysis, a series of experimental tests, and by the development of a computer simulation package. A small scale experimental test was conducted as a proof of concept and a test of the prototype hardware. The small scale test was also used to estimate parameters of the computer simulation program. Later, a full scale test was conducted at a site approximately the size of a typical construction project. Computer simulations of the system performance were found to be in good agreement with the experimental results.
The position error performance of a frequency hopping phase Ineasurenlent type position location system was determined using theoretical, simulation, and experimental means. The primary limitation to position accuracy was found to be propagation channel induced errors. By employing nonlinear filtering methods combined with robust estimation techniques, position error distributions which exceed the performance of classic least squared error methods have been achieved. The relationship between vertical and horizontal errors for practical systems has been determined. Computer simulations have provided estimates of the position accuracy of a direct sequence system which combines time domain techniques for ambiguity resolution determination and phase measurement for fine position. For the first time, phase error distributions of hyperbolic multilateration systems in multipath environments have been studied. The computer simulation tools which have been developed and verified experimentally can be used to analyze the performance of future radio position location systems.<br>Ph. D.
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Bowers, Diane Lesley. "Grammatical constraints and motivations for English/Afrikaans codeswitching: evidence from a local radio talk show." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7082_1190370125.
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<p>The study investigated the practice of codeswitching within the Cape Flats speech community of Cape Town. Members of this speech community have always been exposed to both English and Afrikaans in formal as well as informal contexts. Due to constant exposure to both languages, as well as historical and political experiences, members of the speech community have come to utilize both languages within a single conversation and even within a single utterance. Codeswitching is an integral part of the community's speech behaviour. The main purpose of this research was to uncover and analyze the motivations behind codeswitching in the bilingual communities of Cape Town, while also providing a strong argument that codeswitching patterns evident in their speech do not always correspond completely with linguistic constraints that are regarded as 'universal'.</p>
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Kafiris, Krini. "The rise to dominance of commercial radio broadcasting in Athens, Greece : a global local perspective." Thesis, University of Sussex, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270729.
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Dupuy, Alexandra. "Du HI radio à la mesure de la croissance des bassins gravitationnels." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1201/document.
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Les mouvements des galaxies dans l'Univers sont causés par le tir à la corde qui a lieu entre l'expansion de l'univers et la gravitation. Cette rivalité a un impact sur la formation et la croissance des grandes structures de l'univers. Par conséquent, l'univers est plus ou moins compact selon le gagnant de ce duel. Dans ce contexte, cette thèse est divisée en trois parties, allant des observations à 21 cm à la mesure du taux de croissance actuel des grandes structures de l'univers et de la compacité de l'univers local.La collaboration Cosmicflows prépare des catalogues de distances de galaxies. Jusqu'à présent, trois catalogues ont été publiés, le dernier étant Cosmicflows-3. Cette thèse présente et analyse les données obtenues à partir d'observations à 21 cm. Ces nouvelles données seront utilisées pour former le prochain catalogue de distances Cosmicflows-4 à l'aide de la relation de Tully-Fisher, afin de corriger le manque de données dans l'hémisphère céleste Nord dans le catalogue actuel.À partir de la distance d'une galaxie, il est possible d'en déduire la partie radial de sa vitesse particulière, correspondant à la composante de sa vitesse totale causée par la gravitation. Les vitesses particulières des galaxies sont des sondes non-baisées de la matière et permettent d'extraire des informations sur les grandes structures de l'univers. Deux méthodologies utilisant les vitesses particulières ont été développées durant cette thèse pour caractériser les grandes structures de l'univers local.D'une part, les catalogues de vitesses particulières peuvent être utilisés pour reconstruire des champs de vitesse tridimensionnels. De tels champs de vitesse permettent de cartographier la structure de l'univers local et sont exploités dans cette thèse, à l'aide des lignes de flux, pour identifier des bassins et vallées gravitationnels dans l'univers local.D'autre part, une méthode basée sur l'analyse des corrélations à deux points des vitesses particulières des galaxies a été développée afin d'exhiber le taux de croissance actuel des grandes structures de l'univers local à partir de données observationnelles. Cette méthodologie est appliquée au catalogue observationnel de vitesses particulières Cosmicflows-3<br>Motions of galaxies in the universe are due to the rivalry between the expansion of the universe and gravitation. This tug-of-war impacts the formation and the growth of large scale structures of the universe. Thus, depending on the identity of the winner of this duel, the universe is more or less compact. Within this context, this PhD thesis is divided into three parts, spanning from HI observations to the estimate of the growth of rate of large scale structures of the universe and the compactness of the local universe.The Cosmicflows collaboration assembles catalogues of galaxy distances. Up to now, three catalogues have been published, the last one being Cosmicflows-3. This thesis presents and analyses observational data obtained from HI observations. These new data will be used to construct the new compilation of distances Cosmicflows-4 by the use of the Tully-Fisher relation, in order to correct the lack of data in the Northern celestial hemisphere in the current catalog.From the distance of a galaxy, one can derive the radial part of its peculiar velocity corresponding to the component of its total velocity caused by gravitation. Peculiar velocities allow to probe the matter content of the universe and to extract information on large scale structures of the universe. Two methodologies using peculiar velocities have been developed during this thesis to characterize large scale structures of the local universe.On the one hand, peculiar velocity catalogues can be used to reconstruct tri-dimensional velocity fields. These velocity field allow one to map the structure of the local universe and are used in this thesis to identify gravitational basins and valleys within the local universe by computing streamlines.On the other hand, a method based on the analysis of two-point galaxy peculiar velocity correlations has been developed in order to constrain the growth rate of large scale structures of the local universe from observational data. This method is applied to the Cosmicflows-3 catalogue of observed peculiar velocities
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Liu, Xiaoshan. "Mobility and radio resource management in heterogeneous wireless networks." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38233873.
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Gelincik, Samet. "Interference management in sectored cellular networks with local multi-cell processing." Electronic Thesis or Diss., Institut polytechnique de Paris, 2019. http://www.theses.fr/2019IPPAT010.
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L’exigence de débit de données dans les communications sans fil due à l’emploi de smartphones, d’ordinateurs portables, de tablettes et de capteurs augmente considérablement. Cela pose directement des demandes extraordinaires sur de précieuses ressources spectrales. Pour satisfaire la saturation attendue sur les bandes actuellement utilisées, les systèmes de communication modernes permettent une réutilisation très fréquente des fréquences spatiales et évoluent vers des réseaux hétérogènes de stations de base (BS) couvrant des zones plus petites (petites cellules). De toute évidence, un tel système souffre des conditions d’interférence intercellulaires préjudiciables, en particulier aux bords des cellules. Par conséquent, il est clairement convaincant que la gestion des interférences est un goulot d’étranglement pour les réseaux sans fil actuels et futurs. Les schémas de traitement multicellulaire (MCP) ont été principalement utilisés pour fournir aux BS des versions quantifiées des signaux d’émission / réception d’autres BS via des liaisons de liaison (permettant le décodage en cluster. Il est alors possible que les données utilisateur soient traitées conjointement par plusieurs BS) à la fois en liaison montante et en liaison descendante, imitant ainsi les avantages du MIMO virtuel. Cependant, la mise en oeuvre de MCP pour toutes les BS du réseau est assez difficile en pratique en raison de la grande complexité de calcul et des retards excessifs, même pour les grands réseaux modérés. Cependant, diviser le réseau en plusieurs clusters et les laisser coopérer au sein de chaque cluster plutôt que sur l’ensemble du réseau apporte également certains avantages du MCP en ne nécessitant que les signaux reçus locaux et le CSI local. Nous appelons ce cadre MCP local, ce qui améliore également la robustesse du réseau aux échecs de connexion et l’évolutivité. Dans cette thèse, nous avons étudié les avantages de MCP local dans la gestion des interférences pour modèle de réseau hexagonal sectorisé sous trois scénarios différents. Dans le premier, nous avons supposé que le BS peut coopérer par le biais de liaisons à capacité limitée pour un nombre donné de cycles de coopération. Nous avons proposé un nouveau schéma de regroupement pratique qui adapte la façon dont les BS coopèrent à la sectorisation des cellules. Plus haut et plus bas et limites supérieures des degrés de liberté par utilisateur (DoF) en fonction de la coopération de nombres et la capacité de raccordement a été dérivée et une analyse SNR finie a ét é effectuée. Dans le deuxième scénario, nous supposé un système cellulaire multi-cloud, o`u chaque processeur central (CP) a une puissance de traitement limitée. UNE un schéma de clustering a été proposé qui adapte l’association entre BS et CP à la sectorisation. Limite inférieure du DoF par utilisateur en fonction de la capacité de liaison, de la capacité de CP et du rapport du nombre de Le CP en nombre de BS a ét é dérivé. Dans le dernier scénario, nous avons supposé à nouveau un cellulaire basé sur plusieurs nuages et appliqué des systèmes de calcul et de transfert (CoF) et de CoF quantifiés au clustering proposé. Pour CoF quantifié, nous avons proposé une méthode pour réduire le nombre de codes de réseau imbriqués pour réduire la mise en oeuvre complexité tout en conservant une dégradation raisonnable des performances<br>The data rate requirement in wireless communication due to employment of smartphones, laptops, tablets and sensors is increasing drastically. This directly poses extra-ordinary demands on precious spectral resources. To satisfy with the expected saturation on the currently used bands, modern communication systems are allowing very aggressive spatial frequency reuse and moving towards heterogenous networks of base stations (BS) covering smaller areas (small cells). Evidently, such system suffer from the detrimental inter-cell interference conditions, particularly at cell edges. Therefore, it is clearly convincing that interference management is a bottleneck for current and future wireless networks. Multi-cell processing (MCP) schemes has mostly been used to provide BSs with quantized versions of the transmit/receive signals of other BSs via backhaul/fronthaul links (allowing for clustered decoding). It is then possible for user data to be jointly processed by several BSs at both uplink and downlink, hence imitating the benefits of virtual MIMO. However, the implementation of MCP for all the BSs of the network is quite challenging in practice due to large computational complexity and excessive delays even for moderately large networks. However, dividing the network into several clusters and letting them to cooperate within each cluster rather than the entire network also brings some benefit of MCP by requiring only local received signals and local CSI. We name this framework as local MCP, which also improves the robustness of the network to connection failures and scalability. In this thesis, we have investigated the benefits of local MCP in interference management for sectored hexagonal network model under three different scenarios. In the first one, we assumed that the BS can cooperate through limited capacity links for a given number of cooperation rounds. We proposed a new practical clustering scheme that adapts the way BSs cooperate to cells sectorization. Upper and lower bounds on the peruser degrees-of-freedom (DoF) as a function of number cooperation round and backhaul capacity have been derived, and finite SNR analysis has been done. In the second scenario, we assumed a multi-cloud cellular system, where each central processor (CP) has a limited processing power. A clustering scheme has been proposed that adapts the association between BSs and CPs to the sectorization. Lower bound on the per-user DoF as a function of fronthaul capacity, CP capacity and the ratio of number of CP to number of BS has been derived. In the last scenario, we assumed again a multi-cloud based cellular system, and applied compute-and-forward (CoF) and Quantized CoF schemes to the proposed clustering. For Quantized CoF, we proposed a method for reducing the number of nested lattice codes to lower the implementation complexity while keeping reasonable performance degradation
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Liu, Xiaoshan, and 劉曉杉. "Mobility and radio resource management in heterogeneous wireless networks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38233873.
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Mihoubi, Selma. "La stratégie d’implantation de Radio Chine Internationale en Afrique de l’Ouest : un ancrage local aux visées globales." Thesis, Sorbonne université, 2020. http://www.theses.fr/2020SORUL049.
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Depuis le début des années 2010, les relais FM de Radio Chine Internationale s’installent dans les grandes villes des pays d’Afrique de l’Ouest. Largement investie économiquement dans la région, la Chine veut également contrôler son image par le biais de l’influence médiatique. Mais difficile pour Radio Chine Internationale de s’imposer dans une zone où les radios internationales des anciennes puissances coloniales comme Radio France Internationale et British Broadcasting Corporation dominent encore aujourd’hui le paysage médiatique. La régionalisation des radios publiques internationales est utilisée par les États pour leur propre rayonnement au-delà des frontières politiques. Grâce à une diplomatie offensive et un ancrage territorial stratégique, RCI a réussi progressivement son implantation, pour participer aux ambitions globales du pouvoir communiste chinois : l'objectif étant le contrôle des opinions publiques africaines, pour faire entendre sa voix sur la scène internationale, au même titre que les partenaires traditionnels des pays ouest-africains<br>Since 2010, China Radio International’s FM relays stations were set up in big West African cities. China invested heavily in Sahelian countries development, and therefore needs to control its image using media influence. At first, China International Radio had a very hard time penetrating this region where international radios from former colonial powers as Radio France Internationale and British Broadcasting Corporation still pervade. Nations use international broadcasters’ regionalization beyond their political borders to work on their own global power of influence. CRI managed its implementation using a vibrant diplomacy and a strategic regional anchoring in order to serve the Communist Party of China. The main goal stands in the supervision of public opinion, to make its voice heard on the international stage the same way as West African countries’ traditional partners
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Hämäläinen, M. (Matti). "Singleband UWB systems:analysis and measurements of coexistence with selected existing radio systems." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514280644.
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Abstract
An inevitable trend in wireless communications is the requirement for higher and higher data rates. At the same time, location awareness requires high accuracy for positioning ability. One option fulfilling both of these challenges is the use of an ultra wideband (UWB) physical layer technology due to its extremely large inherent bandwidth. From the two possible solutions to generate UWB signals, this thesis is focused on the singleband approach. This technique is closer to the original idea of impulse radio transmission than the other recently proposed multiband UWB approach.
This thesis focuses on UWB coexistence with several selected radio systems; global positioning and cellular systems, and wireless local area networks. The topic was studied analytically and with experimental tests. The analytical part is divided into simulations and theoretical calculations. In the study, two different physical layer concepts, several modulation schemes and pulse waveforms have been used to find the best system performance under interference. From time hopping and direct sequence based approaches (TH and DS, respectively), the latter with binary pulse amplitude modulation was seen to outperform the former one in an interfered multipath channel if compared with bit error rate performance. Therefore, the theoretical calculations are addressed to the DS-UWB approach. The formulation defined makes it possible to rather easily calculate the upper bound for DS-UWB system performance in an AWGN channel and the results can be used to calculate reference bounds, for example, in receiver algorithm studies.
The experimental part of the work focused on link level coexistence measurements between UWB and either IEEE802.11b or 3G networks. UWB can cause harmful performance degradation on the victim system if there are unrealistic numbers of active interferers in close vicinity of the victim receiver. However, increasing the separation between the UWB interferer and victim to 40 cm, or 70 cm, in the case of WLAN and 3G, respectively, the impact is insignificant. It was also shown that the activity factor of the UWB transmitter has a great impact on the victim system's performance degradation. UWB activity factors of less than about 5% can be tolerated by the studied victim systems.
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Balcon, Nicolas, and nicolas balcon@gmail com. "Atmospheric pressure Radio Frequency discharges, diagnostic and numerical modeling." The Australian National University. Research School of Physical Sciences and Engineering, 2008. http://thesis.anu.edu.au./public/adt-ANU20080318.234936.
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The aim of this thesis is to investigate the properties of a Radio Frequency capacitive discharge at atmospheric pressure in argon. In these conditions where the pressure x distance product is around 150 Torr.cm, the discharge usually consists of several locally hot filaments. By pulsing the RF generator with an appropriate width and period, it was found possible to control the filament to glow transition in order to obtain a diffused and stable plasma.¶
The 2 mm gap between the electrodes is open to the ambient air and fed with argon via one hundred submillimetric holes regularly spread on the surface of the top electrode. This configuration allows on-line surface treatment of polymer films without having to turn the discharge off between successive samples. An important and lasting improvement of the polymer wettability is quickly obtained without risk of damage.
The plasma diagnostic methods are emission spectroscopy and electric measurements. The Stark broadening of the Balmer β transition line of atomic hydrogen is measured to determine a plasma density of 10^15/cm3 in the filamentary mode. The glow mode density estimation was based on power balance yielding a density of 5×10^11/cm3. Emission line ratios between neutrals and Ar+ ions are used in the Saha equation to calculate the electron temperature. It results in an approximation of 1.3 eV for the glow mode and 1.7 eV for the filaments.¶
A unidimensional self-consistent fluid model is developed to gain insight into the homogeneous discharge behaviour. Poissons equation for the electric field is coupled to the first moments of the Boltzmann equation (continuity equation, drift-diffusion equation and energy equation). Transport and reaction coefficients are obtained from the mean energy of the electrons.¶
The model is applied to a reduced argon kinetic with the main ionization and excitation processes. Simulation results are in agreement with experimental measurements. The atmospheric pressure RF discharge is similar to a lower pressure RF discharge for which the ionization occurs mainly inside the oscillating sheaths where electrons are the most energetic
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Manning, Edward Patrick. "An Introduction to Local Multipoint Distribution Services with an Investigation of the Effects of Vegetation on the Radio Channel." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/9792.
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This thesis takes the reader through an overview of issues pertinent to Local Multi-point Distribution Services (LMDS). The reader will first learn what LMDS is and then review the system architectures that are made available for LMDS technologies. After summarizing the basics of LMDS, we will compare it with some competing technologies.
The reader will then be guided through the aspects of millimeter (mm) wave radio link design. This should be a good lead into the experiment section, since it is suspected that the reader would want to be aware of what design techniques are involved in mm-wave radio link design and what issues may pose potential problems and how they may be mitigated.
Of the potential problems posed in the mm-wave radio link design section, one will be further investigated experimentally. This is the investigation of the effect of vegetation on the magnitude, phase and error vector magnitude (EVM) performance of an LMDS channel. The motivation for this experiment came from the review earlier work, which showed an unexpected relationship between carrier to noise ratio (C/N) and bit error rate BER.<br>Master of Science
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Nascimento, Claudia. "Lokal journalistik i det nya medielandskapet : En kvalitativ onlinestudie av radiokanalen P4 Västmanland." Thesis, Södertörns högskola, Institutionen för kommunikation, medier och it, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-16692.
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Huvudsyftet med denna uppsats är att undersöka varför människor i ålderskategorin 35-49 år inte lyssnar på radiokanalen P4 Västmaland, en av Sveriges Radios 26 st P4 kanaler. Den andra punkten som analyserats är, varför P4 Västmanlands publik lyssnar på kanalen. Med hjälp av fokusgruppsintervjuer via sociala media Facebook undersöks 15 personer uppdelade i två fokusgrupper: P4s lyssnare och icke lyssnare. Det gemensamma för båda grupperna är radiolyssnande som intresse och ålderskategorin. Tillsammans har grupperna genererat ca 234 facebook-inlägg, som utgör grundmaterialet till denna studie. En kompletterande enkät finns med som stöd inför analysdelen samt en intervju med P4 Västmanlands programledare, Annika Nordin. Denna studie använder sig främst av medieteoretikern, Barbara Thomass (2003) teoretiska perspektiv om public sphere (Habermas, 1989) och knowledge society sammankopplat till Public Service. Studiens resultat visar att majoriteten i målgruppen icke-lyssnare uppfattar kanalen som omodern. Denna uppfattning delas även av P4s egna lyssnare. Studien visar att Icke-lyssnarna inte tycker att lokala nyheter är viktiga. När det gäller hur man tar reda på nationella och internationella nyheter är det framförallt webben, inte radio, som är det prioriterade alternativet för den sistnämnda gruppen. Studien visar även att för båda grupperna är datavana avgörande för hur man interagerar med medier och konsumerar nyheter. Slutsatsen av studien är att om P4 Västmanland upplevs som omodern, så kan detta vara ett hinder för radiokanalen att rekrytera nya lyssnare. Kanalen måste hitta en balans för att främja både sin egen publik, som efterfrågar variation i lokala nyheter, och samtidigt nå flera lyssnare i åldersgruppen mellan 35 och 49 år. Båda grupperna signalerar att möjligheten till interaktion via nya medier bör tas tillvara i dessa nya tider.<br>The main purpose of this thesis is to examine why people aged between 35-49 years are not listening to the Public Service radio channel P4 Västmanland, one of Swedish Radio´s 26 local channels. The second point has been analyzed is why P4 Västmanland audience listens to the channel. With the help of focus group interviews via social media site Facebook we examined 15 individuals divided into two focus groups: P4 listeners and non-listeners. Listening to the radio for pleasure is common to both groups, who are in the same age category. Together the groups are generated from about 234 Facebook posts, which are the basic material for this study. A supplemental questionnaire is included as a pre-analysis portion as well as an interview with P4 Västmanland journalist, Annika Nordin. This study mostly uses Barbara Thomass' (2003) theoretical perspectives on the public sphere (Habermas, 1989) and knowledge society linked to the Public Service. Our results demonstrate that the majority of the target non-listeners perceive the channel as outdated; this view is also shared with the P4's listeners. The study shows that non-listeners do not think local news is important. When it comes to how to get in contact with national and international news, it is primarily the Web, not the radio, which is the priority choice for the latter group. The study also shows that for both groups, computer access is crucial to how people interact with media and consume news. The conclusion of this study is that if the P4 Västmanland channel is perceived as outdated, so this may be an obstacle to the radio channel to recruit new listeners. The channel must find a balance in order to promote it´s own audience, which require the variation in local news, while reaching more listeners in the 35 and 49 age group. Both groups indicate that the potential for interaction through new media should be utilized in these new times.<br>A função principal deste estudo é analisar a razão pela qual pessoas na faixa etária de 35 a 49 anos não têm interesse na programação da emissora pública de rádio, P4 Västmanland, um dos 26 canais locais da Suécia. Em contrapartida, a outra questão a ser analisada refere-se à razão pela qual os ouvintes do canal citado, têm interesse na programação. Este estudo utiliza-se do método de entrevista de foco realizado através da mídia social Facebook e tem como participantes 15 pessoas divididas em dois grupos: ouvintes da P4 Västmanland e ouvintes de outras emissoras de rádio suecas. O fator comum entre os grupos é o interesse por programas de rádio e o fato de serem da mesma faixa etária. A base do material de estudo é composta por aproximadamente 234 comentários realizados através da mídia social Facebook. O estudo dispõe também de uma enquete feita com os participantes e uma entrevista com a jornalista Annika Nordin, locutora de um dos programas da rádio P4 Västmanland. O estudo se utiliza, em primeiro plano, das perspectivas teóricas de Barbara Thomass (2003) a respeito de public sphere ( Habermas, 1989) e knowledge society acopladas ao ideal de emissoras púbicas de rádio e TV. O resultado do estudo mostra que a maioria dos não - ouvintes da P4 Västmanlands consideram o canal como antiquado, fator que também foi verificado entre os próprios ouvintes da rádio. Além disso, os não-ouvintes relatam não considerarem importante o noticiário local. A respeito do consumo de notícias nacionais e internacionais, o estudo mostra que a internet, para o último grupo citado, é o meio de comunicação priorizado para se ter acesso à informação. O estudo mostra ainda que o acesso à internet define o modo de interação com os meios de comunicação e consumo de notícias, de modo geral. O estudo chega à conlusão de que se a emissora de rádio P4 Västmanland é vista como antiquada, torna-se, assim, difícil o recrutamento de novos ouvintes. A emissora em questão necessita de um equilíbrio para agradar seus próprios ouvintes , que estão em busca de um conteúdo variado no que diz respeito à abordagem de notícias locais e, ao mesmo tempo, adquirir novos ouvintes na faixa etária de 35 a 49 anos. Os dois grupos de participantes mostram também que as novas possibilidades de interação mediática precisam ser utilizadas em maior escala na atualidade.
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Joram, Niko. "Design of a Dual Band Local Positioning System." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-186495.
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This work presents a robust dual band local positioning system (LPS) working in the 2.4GHz and 5.8GHz industrial science medical (ISM) bands. Position measurement is based on the frequency-modulated continuous wave (FMCW) radar approach, which uses radio frequency (RF) chirp signals for propagation time and therefore distance measurements. Contrary to state of the art LPS, the presented system uses data from both bands to improve accuracy, precision and robustness. A complete system prototype is designed consisting of base stations and tags encapsulating most of the RF and analogue signal processing in custom integrated circuits. This design approach allows to reduce size and power consumption compared to a hybrid system using off-the-shelf components. Key components are implemented using concepts, which support operation in multiple frequency bands, namely, the receiver consisting of a low noise amplifier (LNA), mixer, frequency synthesizer with a wide band voltage-controlled oscillator (VCO) having broadband chirp generation capabilities and a dual band power amplifier. System imperfections occurring in FMCW radar systems are modelled. Effects neglected in literature such as compression, intermodulation, the influence of automatic gain control, blockers and spurious emissions are modeled. The results are used to derive a specification set for the circuit design. Position estimation from measured distances is done using an enhanced version of the grid search algorithm, which makes use of data from multiple frequency bands. The algorithm is designed to be easily and efficiently implemented in embedded systems. Measurements show a coverage range of the system of at least 245m. Ranging accuracy in an outdoor scenario can be as low as 8.2cm. Comparative dual band position measurements prove an effective outlier filtering in indoor and outdoor scenarios compared to single band results, yielding in a large gain of accuracy. Positioning accuracy in an indoor scenario with an area of 276m² can be improved from 1.27m at 2.4GHz and 1.86m at 5.8GHz to only 0.38m in the dual band case, corresponding to an improvement by at least a factor of 3.3. In a large outdoor scenario of 4.8 km², accuracy improves from 1.88m at 2.4GHz and 5.93m at 5.8GHz to 0.68m with dual band processing, which is a factor of at least 2.8<br>Die vorliegende Arbeit befasst sich mit dem Entwurf eines robusten lokalen Positionierungssystems (LPS), welches in den lizenzfreien Frequenzbereichen für industrielle, wissenschaftliche und medizinische Zwecke (industrial, scientific, medical, ISM) bei 2,4GHz und 5,8GHz arbeitet. Die Positionsbestimmung beruht auf dem Prinzip des frequenzmodulierten Dauerstrichradars (frequency modulated continuous wave, FMCW-Radar), welches hochfrequente Rampensignale für Laufzeitmessungen und damit Abstandsmessungen benutzt. Im Gegensatz zu aktuellen Arbeiten auf diesem Gebiet benutzt das vorgestellte System Daten aus beiden Frequenzbändern zur Erhöhung der Genauigkeit und Präzision sowie Verbesserung der Robustheit. Ein Prototyp des kompletten Systems bestehend aus Basisstationen und mobilen Stationen wurde entworfen. Fast die gesamte analoge hochfrequente Signalverarbeitungskette wurde als anwendungsspezifische integrierte Schaltung realisiert. Verglichen mit Systemen aus Standardkomponenten erlaubt dieser Ansatz die Miniaturisierung der Systemkomponenten und die Einsparung von Leistung. Schlüsselkomponenten wurden mit Konzepten für mehrbandige oder breitbandige Schaltungen entworfen. Dabei wurden Sender und Empfänger bestehend aus rauscharmem Verstärker, Mischer und Frequenzsynthesizer mit breitbandiger Frequenzrampenfunktion implementiert. Außerdem wurde ein Leistungsverstärker für die gleichzeitige Nutzung der beiden definierten Frequenzbänder entworfen. Um Spezifikationen für den Schaltungsentwurf zu erhalten, wurden in der Fachliteratur vernachlässigte Nichtidealitäten von FMCW-Radarsystemen modelliert. Dazu gehören Signalverzerrungen durch Kompression oder Intermodulation, der Einfluss der automatischen Verstärkungseinstellung sowie schmalbandige Störer und Nebenschwingungen. Die Ergebnisse der Modellierung wurden benutzt, um eine Spezifikation für den Schaltungsentwurf zu erhalten. Die Schätzung der Position aus gemessenen Abständen wurde über eine erweiterte Version des Gittersuchalgorithmus erreicht. Dieser nutzt die Abstandsmessdaten aus beiden Frequenzbändern. Der Algorithmus ist so entworfen, dass er effizient in einem eingebetteten System implementiert werden kann. Messungen zeigen eine maximale Reichweite des Systems von mindestens 245m. Die Genauigkeit von Abstandsmessungen im Freiland beträgt 8,2cm. Positionsmessungen wurden unter Verwendung beider Einzelbänder durchgeführt und mit den Ergebnissen des Zweiband-Gittersuchalgorithmus verglichen. Damit konnte eine starke Verbesserung der Positionsgenauigkeit erreicht werden. Die Genauigkeit in einem Innenraum mit einer Grundfläche von 276m² kann verbessert werden von 1,27m bei 2,4GHz und 1,86m bei 5,8GHz zu nur 0,38m im Zweibandverfahren. Das entspricht einer Verbesserung um einen Faktor von mindestens 3,3. In einem größeren Außenszenario mit einer Fläche von 4,8 km² verbessert sich die Genauigkeit um einen Faktor von mindestens 2,8 von 1,88m bei 2,4GHz und 5,93m bei 5,8GHz auf 0,68m bei Nutzung von Daten aus beiden Frequenzbändern
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Leclercq, Indy. "The local radio sky : high frequency-resolution single-dish studies of polarised Galactic synchrotron emission around 1.4 GHz." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/the-local-radio-sky-high-frequencyresolution-singledish-studies-of-polarised-galactic-synchrotron-emission-around-14-ghz(ea6e9f26-1a23-42c7-8d90-1d47b0297ad4).html.
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Polarised synchrotron emission from the Milky Way is of interest for its role as a foreground to the polarised CMB and as a probe of the interstellar medium. The Galactic ALFA Continuum Transit Survey (GALFACTS) and the Global Magneto-Ionic Medium Survey (GMIMS) are two ongoing surveys of the diffuse polarised emission around 1.4 GHz, with wide bandwidths and high frequency-resolution. In this thesis, I use early data from GALFACTS to investigate the behaviour of polarised, diffuse Galactic synchrotron emission. I also analyse GMIMS total intensity data. I derive a rotation measure (RM) map of the GALFACTS sky using a combination of RM-synthesis and linear angle fitting, commenting on the structure of the maps in general and on specific regions in particular. Overall I find that the maps are rich in features, and probe the RM structure of the extended Galactic emission with reasonable accuracy. I also derive the Angular Power Spectrum (APS) of the polarised emission for thirty-one 15 by 15 degree subregions across the GALFACTS data. I compute the E- and B-modes (E+B) and the scalar APS of the polarised emission (PI). I parametrise the APS by fitting a power law to the data. Comparing the E+B APS to the PI APS shows that E+B is consistently steeper across the sky. The APS data is also used to estimate the level of foreground contamination of the CMB B-mode by the synchrotron emission. I find that the slope of the APS averaged over high-latitude, low-emission subregions agrees exactly with that of the Planck 30 GHz polarised emission, thus setting an upper limit to the synchrotron contamination of CMB B-modes. Finally, I evaluate the spurious, systematic, temperature zero-level offset and associated uncertainty in preliminary GMIMS total intensity maps, finding a lower limit of ±0.26 K. I also make spectral index maps made using the GMIMS data and the Haslam et al. (1982) 408 MHz map, improving upon previous spectral index maps in the literature.
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Cardoso, Guilherme Schiess [UNESP]. "Avaliação do bloqueio paravertebral cervical com ropivacaína em cães anestesiados pelo isofluorano e submetidos à osteossíntese radio-ulnar." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/95061.
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cardoso_gs_me_botfm.pdf: 985084 bytes, checksum: 646b38379c09aefed563ffcbee2f4812 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Os animais são capazes de sentir dor e esta influencia a qualidade da recuperação anestésica e o resultado pós-cirúrgico. Os bloqueios anestésicos de nervos periféricos são cada vez mais utilizados para prevenir e aliviar a dor, sendo a abordagem paravertebral cervical do plexo braquial (raízes C6, C7, C8 e T1) uma alternativa para a anestesia do membro torácico de caninos. A ropivacaína é um anestésico local altamente lipossolúvel, de longa ação e que produz analgesia confiável com bloqueio motor mínimo. Objetivou-se com esse estudo avaliar o bloqueio paravertebral cervical do plexo braquial em cães com ropivacaína 1% comparando-se duas técnicas de localização das raízes nervosas: a palpação de referências anatômicas específicas e a utilização de estimulador de nervos periféricos. Foram empregados 24 cães submetidos à osteossíntese radio-ulnar sob anestesia geral inalatória com isofluorano, divididos aleatoriamente em quatro grupos distintos de acordo com os tratamentos: TI - SP: solução salina 0,9% perineural utilizando as referências anatômicas para localização das raízes nervosas cervicais; TII - SN: solução salina 0,9% utilizando as referências anatômicas e estimulador de nervos periféricos; TIII - RP: ropivacaína 1% perineural utilizando apenas referências anatômicas para localização das raízes nervosas cervicais; e TIV - RN: ropivacaína 1% utilizando as referências anatômicas e estimulador de nervos periféricos dessas raízes. Foram monitoradas as frequências cardíaca (FC) e respiratória (f), as pressões arteriais sistólica (PAS), média (PAM) e diastólica (PAD), a temperatura esofágica (Tº), a pressão parcial de dióxido de carbono (ETCO2) e a concentração de isofluorano (ETISO) ao final da expiração...<br>Animals are capable of feeling pain and this influences the quality of anesthesia recovery and outcome following surgery. The peripheral nerve blocks are increasingly used to prevent and relieve pain, and cervical paravertebral approach to the brachial plexus (roots C6 , C7, C8 and T1) is an alternative to anesthesia of the canine forelimb. The local anesthesics ropivacaine is highly soluble, long-acting and produces reliable analgesia with minimal motor block. The objectvice of this study was to evaluate the cervical paravertebral block of the brachial plexus with ropivacaine 1% and compare two techniques for localization of the nerve roots: palpation of anatomical landmarks and use of peripheral nerve stimulator. It was use 24 animals submitted to radio-ulnar osteosynthesis, randomly divided into four distinct groups according to treatment: TI - SP: perineural administration of 0,9% saline solution using anatomical landmarks to localization of the cervical nerve roots; TII - SN: perineural administration of 0,9% saline solution using anatomical landmarks and peripheral nerve stimulator; TIII - RP: ropivacaine 1% perineural administration using only anatomical land marks; and TIV - RN: ropivacaine 1% administration using anatomical landmarks and peripheral nerve stimulator to localization of the nerve roots. It was monitored heart rate (HR), respiratory rate (FR), systolic (SAP), mean (MAP) and diastolic arterial pressure (DAP), body temperature (T) and expired CO2 (ETCO2)) and isoflurane (ETISO) concentrarion. Increase in HR and/or SAP and/or MAP in 20% of baseline were characterized as the need for “rescue” analgesia with fentanyl (5 μg/kg - IV). The analysis of variance test was used, followed by Tukey’s multiple comparison test. The null hypothesis (no differences between treatments) was reject when P < 0.05. The block with... (Complete abstract click electronic access below)
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Harwood, Victoria Marie. "Reexamining a National Disaster: The Local Charles E. Coughlin and the Community's Response." Bowling Green State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1460070904.
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Selormey, Ernestina Edem. "Citizen voice and bureaucratic responsiveness : FM radio phone-ins and the delivery of municipal and local government services in Accra, Ghana." Thesis, University of Sussex, 2013. http://sro.sussex.ac.uk/id/eprint/46446/.
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There is a large body of work in actual practice, and in academia on citizen voice and voice mechanisms. Since the introduction of the concept, and its application to various sectors, contexts and countries, there have been several arguments in support of its effectiveness as a mechanism for holding governments and public officials to account; or ensuring that the voices of the poor and marginalised are heard. Some have also argued that voice is a good measure of inclusiveness, and for improvements in service delivery at the local level. However, there have also been arguments that, in as much as voice as a mechanism is good, it has limitations. The limitations arise from the fact that voice alone, cannot produce the desired effect---response or improvements in service delivery. Thus, for voice to be effective, it must be ‘heard.' This thesis is about the extent to which public voice expressed through radio phone-in programmes can influence the responsiveness of public service delivery organisations at the local level. The study is an empirical enquiry into a new form of voice mechanism, which occurs on radio in Accra, Ghana. The study specifically looks at two unique radio phone-in programmes on two popular Accra-based private commercial FM radio stations. The two programmes provide a weekly on-air platform for residents of Accra and those within transmission range to call in live and lodge complaints about public and/or private services for follow-up and redress. The main argument of this thesis is that voice mediated through specific radio programmes, not only has the potential to go far; it also has potential to be ‘heard' due to follow-up, creative programming and some key characteristics of the programmes. The thesis utilizes the new concept of ‘mediated voice' to understand how radio complaints about waste management (a service provided by the Accra Metropolitan Authority, the local government for Accra) can elicit responses from the service providers. The main findings in this study are that radio phone-in programmes have the ability to receive individual voice and represent them as though it were a collective problem. This ability ensures that voice is heard. Second, that because of the publicness of the ‘voice' on radio, and subsequent follow-up on complaints by the radio programmes, public officials are forced to respond for fear of both administrative and electoral sanctions.