Bibliografías temáticas / Radio

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Literatura académica sobre el tema "Radio"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 8 de febrero de 2025

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Artículos de revistas sobre el tema "Radio"

1

Uimonen, Heikki. "Radio Suomen ja Radio Novan ohjelmasisällöt taustamusiikki­teollisuutena". Media & viestintä 45, n.º 1 (31 de marzo de 2022): 1–22. http://dx.doi.org/10.23983/mv.115655.

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Julkisrahoitteiset ja kaupalliset radiokanavat soittavat valtaosan Suomen medioi- tuneesta taustamusiikista. Julkisessa tilassa niiden ohjelmasisällöt kilpailevat taustamusiikkiyritysten tarjonnan kanssa. Kaikki mainitut musiikkisisällöt ovat luokiteltavissa jokapaikkaiseksi musiikiksi, joka suunnitellusti tai tarkoittamattaan palauttaa kuulijalleen menneisyydessä koetut affektit osaksi nykyhetkeä. Lisäksi radioiden ohjelmasisältöä rakentavat näennäisen huolettomasti valitsemistaan aiheistaan puhuvat juontajat. Artikkelissa tarkastellaan Radio Suomen ja Radio Novan ohjelmasisältöjä äänellisenä kulttuurina ja osana taustamusiikkiteollisuuden jatkumoa. Empiirisenä aineistona ovat radioiden päivälähetykset ja henkilökunnan haastattelut. Teoreettisena lähtökohtana on ymmärrys ohjelmasisältöjen rakentumisesta kulttuurisissa toimintaympäristöissään, jota muokkaavat tiettynä aikana ja tietyssä paikassa teknologiaan, lainsäädäntöön ja talouteen liittyvät tekijät. Radioiden omistussuhteet ja musiikkitarjonnan muutokset kontekstoidaan mediakentän sääntelyyn. Analyysin perusteella musiikkisisällöt rakentuvat tuttuuden tuotannolle ja noudattavat kuulijansa päivärytmiä painottuen Radio Suomessa kotimaisiin ja Radio Novalla ulkomaisiin musiikkiesityksiin. Henkilökohtaiselta etäisyydeltä viestivät juontajat asettuvat diskursiivisesti kuulijansa rinnalle, mikä korostuu mainosrahoitteisen radion tarjonnassa myös aiheiden valinnassa. Ohjelmasisällöt kytkeytyvät mediakonvergenssin mukaisesti mediatalojen muihin musiikkisisältöihin samalla, kun radiot painottavat puhesisällön merkitystä kilpaillessaan suoratoistopalvelujen musiikkitarjonnan kanssa.
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2

Havisa, Jihan, Taris Anggraeni, Ilham Baihaqi y Indra Naufal. "Upaya Radio Elbayu Mempertahankan Pendengar". COMMUSTY Journal of Communication Studies and Society 1, n.º 2 (27 de marzo de 2024): 48–56. http://dx.doi.org/10.38043/commusty.v1i2.3881.

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Radio El Bayu is one of the AM radios that still exist today. This radio is also the only active radio station in Gresik. This radio, established in 1994, has a target audience of 40 years and over. In its time, this radio often held an event for the local community to build its image among the public. When many radios broadcast with FM, El Bayu remains consistent with the AM transmitter used. In fact, in Indonesia itself, it is very rare to find radio stations that still use this AM transmitter. Although the number of radio listeners has decreased, some people still choose to listen to radio channels. In this journal, we will discuss the efforts made by El Bayu Radio to retain radio listeners, considering that El Bayu still uses AM transmitters and has to compete with current digital media.
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3

Molnar, Helen y Helen Wilson. "Introduction: Radio — New Technologies, New Networks". Media International Australia 91, n.º 1 (mayo de 1999): 5–9. http://dx.doi.org/10.1177/1329878x9909100103.

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Radio is an under-researched medium, yet it is present in an increasing range of forms and roles in our everyday lives. For the last two decades, Australians over 18 years have listened to an average of 20 hours of radio a week. Owning multiple receivers is very much the norm and it is not unusual to hear of households with five or more radios. We wake to radio, listen to radio in our showers, go to work with radio in our cars, listen to radio while we are on telephone-hold during the day, and take radios to the beach or to sporting events to follow the commentary. Radio at home can be aural wallpaper, a source of information and entertainment and a companion, as the talkback shows demonstrate. Most of all, radio is local — or at least, it has been.
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4

Krupar, Vratislav, Oksana Kruparova, Adam Szabo, Lynn B. Wilson, Frantisek Nemec, Ondrej Santolik, Marc Pulupa, Karine Issautier, Stuart D. Bale y Milan Maksimovic. "Radial Variations in Solar Type III Radio Bursts". Astrophysical Journal Letters 967, n.º 2 (28 de mayo de 2024): L32. http://dx.doi.org/10.3847/2041-8213/ad4be7.

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Abstract Type III radio bursts are generated by electron beams accelerated at reconnection sites in the corona. This study, utilizing data from the Parker Solar Probe’s first 17 encounters, closely examines these bursts down to 13 solar radii. A focal point of our analysis is the near-radial alignment (within 5°) of the Parker Solar Probe, STEREO-A, and Wind spacecraft relative to the Sun. This alignment, facilitating simultaneous observations of 52 and 27 bursts by STEREO-A and Wind respectively, allows for a detailed differentiation of radial and longitudinal burst variations. Our observations reveal no significant radial variations in electron beam speeds, radio fluxes, or exponential decay times for events below 50 solar radii. In contrast, closer to the Sun we noted a decrease in beam speeds and radio fluxes. This suggests potential effects of radio beaming or alterations in radio source sizes in this region. Importantly, our results underscore the necessity of considering spacecraft distance in multispacecraft observations for accurate radio burst analysis. A critical threshold of 50 solar radii emerges, beyond which beaming effects and changes in beam speeds and radio fluxes become significant. Furthermore, the consistent decay times across varying radial distances point toward a stable trend extending from 13 solar radii into the inner heliosphere. Our statistical results provide valuable insights into the propagation mechanisms of type III radio bursts, particularly highlighting the role of scattering near the radio source when the frequency aligns with the local electron plasma frequency.
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5

Mpehongwa, Gasper. "Assessment of Community Radio Social Impact in Tanzania". International Journal of Communication and Public Relation 9, n.º 3 (15 de abril de 2024): 34–47. http://dx.doi.org/10.47604/ijcpr.2496.

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Purpose: This paper assessed social impacts of three community radio stations located in three different social-economic zones in Tanzania namely, Kilosa in the Eastern Zone, Karagwe in the Lake Victoria Zone and Orkonerei Community Radio (ORS) in the Northern Zone. Methodology: The study used cross sectional design whereby data were collected at one point in time. Purposive sampling methods were used to obtain 585 (48% female) respondents based on whether the area was well covered by community radio broadcasts or otherwise. Data were collected interview schedule, in-depth interview of key informants, systematic observations and focus group discussions. Key informants included community radio management and journalists working in the community radios. As for focus group discussions, four discussions were held (two in each community radio) with a total of 40 respondents. Findings: The study found that 51% of the respondents viewed community radio stations as enhanced access to information (news, current affairs and educational informational). On popularity, the study found that on average, community radios were more popular with local audience than other radio stations. This was due to broadcasting local contents. An analysis of sex and education levels of people who preferred community radio showed that 53.4% were men and 46.5% were women. As for education levels, 57% of those who preferred community radio broadcast had primary education followed by those without formal education at 24%. However, contrary to the theory of community radio which asserts that community radios focus on local social economic development, the study found that the most dominant theme was music and general entertainment. Unique Contribution to Theory, Practice and Policy: The study found that community radio stations have enhanced information flow (news, current affairs and education). They are also most popular with local audience compared to other radios. This indicates that if tailored to address contemporary local development issues, community radio can have huge impact. However, the study found that, the most dominant themes in studied stations was music and general entertainment. This is contrary to the theory asserting that community radio should focus on local social development issues. This calls for further investigation on circumstances leading community radios deviation from the popular theory.
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6

Zhang, Feng Shan y Cai Feng Liang. "Cognitive Impulse Ultra Wide Band Spectrum Sharing Radio and Pulse Shaping". Applied Mechanics and Materials 385-386 (agosto de 2013): 1610–13. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1610.

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Both underlay spectrum sharing radios and overlay spectrum sharing radios have their advantages and disadvantages. Ultra wide band (UWB) and cognitive radio (CR) are important underlay and overlay technology respectively used as secondary radio systems. In this paper, a cognitive impulse ultra wide band (CIUWB) spectrum sharing radio technology is presented based on impulse UWB and CR.
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7

Wójciszyn-Wasil, Aneta. "Obrazy – nie tylko w wyobraźni. Wizualna ewolucja radia". Zeszyty Naukowe KUL 61, n.º 1 (19 de octubre de 2020): 373–85. http://dx.doi.org/10.31743/zn.2018.61.1.373-385.

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Przez lata immanentną cechą radia była awizualność. Obrazy funkcjonowały jedynie w kontekście rozważań o wrażeniach percepcyjnych wywołanych w wyobraźni słuchacza. Ekspansja Internetu sprawiła, że obrazy w radiu stały się rzeczywistością. Współczesne radio, zachowując sygnał analogowy, jest również producentem multimedialnych treści publikowanych na wielu platformach dystrybucji. Posługuje się fotografią, wideo, współpracuje z telewizją, jest widoczne w mediach społecznościowych. Artykuł omawia wybrane aspekty wizualnej ewolucji radia: udostępnianie obrazu ze studia, projekt radia z wizją, wspólne programy stacji radiowej i telewizyjnej. Wskazuje również, jak zdjęcia i materiały wideo służą do budowania relacji z odbiorcą.
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8

Lilis Ch, Dede, Mochamad Rochim y Nova Yuliati. "Voluntarism as Social Capital of Community Radio Management: a Case Study in Jarik III Cirebon". KOMUNITAS: International Journal of Indonesian Society and Culture 8, n.º 1 (18 de febrero de 2016): 73–84. http://dx.doi.org/10.15294/komunitas.v8i1.4516.

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Community radio networking (Jarik) III Cirebon is the affiliation of community radio in Cirebon, Kuningan, Majalengka and Indramayu regencies. Jarik III consists of 11 community radios. Besides broadcasting, Jarik is active in social action. They have been defending people especially in human trafficking and domestic violence cases. Based on voluntarism perspective, this article elaborates how those radios mitigate the societys issue. This article was based on research through qualitative method using case study. The data was obtained through interview, observation, and documentation with three community radio FM administrators, namely Baina FM, Bhuana FM, and Caraka FM. The finding of the study shows that the background of the establishment, purpose and community radio operations are based on socio-demographic condition of their own community; society-based service becomes an administrator community radios spirit; and voluntarism underlying administrator performance of community radio helps overcoming peoples problem.
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9

Merz, Redaktion. "Interview mit Jürgen Linke, Geschäftsführer des Bundesverbands Offene Kanäle". merz | medien + erziehung 55, n.º 2 (6 de abril de 2011): 32–33. http://dx.doi.org/10.21240/merz/2011.2.10.

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Jürgen Linke, Geschäftsführer des Bundesverbands Offene Kanäle spricht über die veränderte Verbreitung von Radio durch die Etablierung des Internets, die Funktion von Radio heute sowie über die jugendlichen Radio-Nutzer und die Zukunft des Radios.
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10

Ortíz Sobrino, Miguel Ángel, Dolores Rodríguez Barba y Jean Jacques Cheval. "La radio universitaria en el siglo XXI: perspectiva hispano-francesa". EDMETIC 3, n.º 1 (1 de enero de 2014): 61. http://dx.doi.org/10.21071/edmetic.v3i1.2881.

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<p>La radio universitaria de tipo “radios libres, radios asociativas” en Francia se remonta a la década de los 60. La experiencia pionera dentro de este marco en territorio francés puede considerarse la aparición, en 1969, de <em>Radio Campus Lille</em>. En el caso español, fue la Universidad de la Laguna, en 1987, la primera institución universitaria que promovió las primeras emisiones universitarias realizadas por los estudiantes del Colegio Mayor San Fernando, aunque los primeros referentes pueden situarse en las emisiones de la UNED a través de Radio 3, a partir de 1979. En la actualidad, las radios universitarias francesas están agrupadas en la Red <em>Radio Campus France</em>. Por su parte, las radios universitarias españolas se agrupan en la <em>Asociación de Radios Universitarias</em> (ARU), creada en 2011. Aunque el número de estaciones radiofónicas universitarias es más o menos similar en ambos países, la realidad y desarrollo es bastante diferente. En este artículo se analiza y se hace una revisión crítica de la situación actual de la radio universitaria en Francia y España.</p>
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Tesis sobre el tema "Radio"

1

Zhao, Youping. "Enabling Cognitive Radios through Radio Environment Maps". Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/27826.

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In recent years, cognitive radios and cognitive wireless networks have been introduced as a new paradigm for enabling much higher spectrum utilization, providing more reliable and personal radio services, reducing harmful interference, and facilitating the interoperability or convergence of different wireless communication networks. Cognitive radios are goal-oriented, autonomously learn from experience and adapt to changing operating conditions. Cognitive radios have the potential to drive the next generation of radio devices and wireless communication system design and to enable a variety of niche applications in demanding environments, such as spectrum-sharing networks, public safety, natural disasters, civil emergencies, and military operations. This research first introduces an innovative approach to developing cognitive radios based on the Radio Environment Map (REM). The REM can be viewed as an integrated database that provides multi-domain environmental information and prior knowledge for cognitive radios, such as the geographical features, available services and networks, spectral regulations, locations and activities of neighboring radios, policies of the users and/or service providers, and past experience. The REM, serving as a vehicle of network support to cognitive radios, can be exploited by the cognitive engine for most cognitive functionalities, such as situation awareness, reasoning, learning, planning, and decision support. This research examines the role of the REM in cognitive radio development from a network point of view, and focuses on addressing three specific issues about the REM: how to design and populate the REM; how to exploit the REM with the cognitive engine algorithms; and how to evaluate the performance of the cognitive radios. Applications of the REM to wireless local area networks (WLAN) and wireless regional area networks (WRAN) are investigated, especially from the perspectives of interference management and radio resource management, which illustrate the significance of cognitive radios to the evolution of wireless communications and the revolution in spectral regulation. Network architecture for REM-enabled cognitive radios and framework for REM-enabled situation-aware cognitive engine learning algorithms have been proposed and formalized. As an example, the REM, including the data model and basic application programmer interfaces (API) to the cognitive engine, has been developed for cognitive WRAN systems. Furthermore, REM-enabled cognitive cooperative learning (REM-CCL) and REM-enabled case- and knowledge-based learning algorithms (REM-CKL) have been proposed and validated with link-level or network-level simulations and a WRAN base station cognitive engine testbed. Simulation results demonstrate that the WRAN CE can adapt orders of magnitude faster when using the REM-CKL than when using the genetic algorithms and achieve near-optimal global utility by leveraging the REM-CKL and a local search. Simulation results also suggest that exploiting the Global REM information can considerably improve the performance of both primary and secondary users and mitigate the hidden node (or hidden receiver) problem. REM dissemination schemes and the resulting overhead have been investigated and analyzed under various network scenarios. By extending the optimized link state routing protocol, the overhead of REM dissemination in wireless ad hoc networks via multipoint relays can be significantly reduced by orders of magnitude as compared to plain flooding. Performance metrics for various cognitive radio applications are also proposed. REM-based scenario-driven testing (REM-SDT) has been proposed and employed to evaluate the performances of the cognitive engine and cognitive wireless networks. This research shows that REM is a viable, cost-efficient approach to developing cognitive radios and cognitive wireless networks with significant potential in various applications. Future research recommendations are provided in the conclusion.
Ph. D.
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2

Navalekar, Abhijit C. "Distributed Digital Radios for Land Mobile Radio Applications". Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-dissertations/4.

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The main objective of this dissertation is to develop the second generation of Distributed Digital Radio (DDR) technology. A DDR II modem provides an integrated voice/data service platform, higher data rates and better throughput performance as compared to a DDR I modem. In order to improve the physical layer performance of DDR modems an analytical framework is first developed to model the Bit Error Rate (BER) performance of Orthogonal Frequency Division Multiplexing over Frequency Modulation (OFDM/FM) systems. The use of OFDM provides a spectrally efficient method of transmitting data over LMR channels. However, the high Peak-to-Average (PAR) of OFDM signals results in either a low Signal-to-Noise Ratio (SNR) at FM receiver or a high non-linear distortion of baseband signal in the FM transmitter. This dissertation presents an analytical framework to highlight the impact of high PAR of OFDM signal on OFDM/FM systems. A novel technique for reduction of PAR of OFDM called Linear Scaling Technique (LST) is developed. The use of LST mitigates the signal distortion occurring in OFDM over FM systems. Another important factor which affects the throughput of LMR networks is the Push-to-Talk (PTT) delay. A PTT delay refers to the delay between the instant when a PTT switch on a conventional LMR radio is keyed/unkeyed and a response is observed at the radio output. It can be separated into a Receive-To-Transmit Switch Interval (RTSI) or a Transmit-To-Receive Switch Interval (TRSI). This dissertation presents the typical RTSI delay values, distributions and their impact on throughput performance of LMR networks. An analytical model is developed to highlight the asymmetric throughput problem and the unintentional denial of service (UDOS) occurring in heterogeneous LMR networks consisting of radios with different PTT delay profiles. This information will be useful in performance and capacity planning of LMR networks in future.
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3

Ballena, Castillo Maria de Jesus. "Análisis de las temáticas desarrolladas por las radios comunitarias y educativas: Radio Cutivalú y Radio Vino". Bachelor's thesis, Universidad Católica Santo Toribio de Mogrovejo, 2019. http://hdl.handle.net/20.500.12423/2786.

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El presente trabajo de investigación tuvo como objetivo principal analizar las temáticas desarrolladas por las radios comunitarias y educativas: radio Cutivalú y radio Vino; y como objetivos específicos los siguientes: describir las características de las radios comunitarias y educativas: radio Cutivalú y radio Vino, identificar las temáticas que se desarrollan en radio Cutivalú y radio Vino, y señalar los aportes de las temáticas en el desarrollo de las comunidades en las que están establecidas radio Cutivalú y radio Vino. La metodología que se utilizó en la investigación fue cualitativa, con un enfoque hermenéutico, y los instrumentos aplicados fueron entrevistas a los habitantes de Piura y Jayanca, lugares donde se ubican las radios materia de estudio, para conocer los aportes que estas generan en ellos. El trabajo concluyó que, el aporte principal de radio Cutivalú y radio Vino, con la información que transmiten a la población, es la transmisión de valores y la concientización de los ciudadanos en temas de política, salud y educación, principalmente, y una reflexión dirigida a que estos se conviertan en agentes activos de la transformación de su entorno social.
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4

Miller, Philip Geoffrey. "Radio-loud and radio-quiet quasars". Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260417.

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5

Kim, Kyou Woong. "Exploiting Cyclostationarity for Radio Environmental Awareness in Cognitive Radios". Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27928.

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The tremendous ongoing growth of wireless digital communications has raised spectrum shortage and security issues. In particular, the need for new spectrum is the main obstacle in continuing this growth. Recent studies on radio spectrum usage have shown that pre-allocation of spectrum bands to specific wireless communication applications leads to poor utilization of those allocated bands. Therefore, research into new techniques for efficient spectrum utilization is being aggressively pursued by academia, industry, and government. Such research efforts have given birth to two concepts: Cognitive Radio (CR) and Dynamic Spectrum Access (DSA) network. CR is believed to be the key enabling technology for DSA network implementation. CR based DSA (cDSA) networks utilizes white spectrum for its operational frequency bands. White spectrum is the set of frequency bands which are unoccupied temporarily by the users having first rights to the spectrum (called primary users). The main goal of cDSA networks is to access of white spectrum. For proper access, CR nodes must identify the right cDSA network and the absence of primary users before initiating radio transmission. To solve the cDSA network access problem, methods are proposed to design unique second-order cyclic features using Orthogonal Frequency Division Multiplexing (OFDM) pilots. By generating distinct OFDM pilot patterns and measuring spectral correlation characteristics of the cyclostationary OFDM signal, CR nodes can detect and uniquely identify cDSA networks. For this purpose, the second-order cyclic features of OFDM pilots are investigated analytically and through computer simulation. Based on analysis results, a general formula for estimating the dominant cycle frequencies is developed. This general formula is used extensively in cDSA network identification and OFDM signal detection, as well as pilot pattern estimation. CR spectrum awareness capability can be enhanced when it can classify the modulation type of incoming signals at low and varying signal-to-noise ratio. Signal classification allows CR to select a suitable demodulation process at the receiver and to establish a communication link. For this purpose, a threshold-based technique is proposed which utilizes cycle-frequency domain profile for signal detection and feature extraction. Hidden Markov Models (HMMs) are proposed for the signal classifier. The spectrum awareness capability of CR can be undermined by spoofing radio nodes. Automatic identification of malicious or malfunctioning radio signal transmitters is a major concern for CR information assurance. To minimize the threat from spoofing radio devices, radio signal fingerprinting using second-order cyclic features is proposed as an approach for Specific Emitter Identification (SEI). The feasibility of this approach is demonstrated through the identification of IEEE 802.11a/g OFDM signals from different Wireless Local Area Network (WLAN) card manufactures using HMMs.
Ph. D.
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6

Poulain, Sebastien. "Les radios alternatives : l'exemple de Radio Ici et Maintenant". Thesis, Bordeaux 3, 2015. http://www.theses.fr/2015BOR30020/document.

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Dans cette thèse, nous nous demandons comment les mouvements contreculturels ont trouvé de nouveaux lieux d’expression grâce à la plus grande accessibilité de l’audiovisuel, grâce aussi au combat des « radios libres ». Plus précisément, nous cherchons à savoir pourquoi et comment la société et l’audiovisuel français ont permis la constitution d’un média alternatif radiophonique comme Radio Ici et Maintenant (RIM) et comment cette radio a trouvé un modèle économique viable pour diffuser son idéologie. Nous verrons que l’existence et la persistance de RIM est due à la conjonction de deux phénomènes : d’une part la diminution du coût d’entrée dans la radiophonie grâce au développement et au combat des « radios libres » qui ont donné naissance aux radios associatives (avec leur modèle juridico-économique spécifique), et d’autre part la diminution du coût d’entrée dans le marché religieux avec le développement de la contreculture New Age française issue de la contreculture américaine, elle-même issue des pensées religieuses alternatives occidentales (liées à l’ésotérisme, au médiumnisme) et des religions orientales (l’hindouisme et le bouddhisme). Ainsi, le modèle juridico-économique spécifique des radios associatives a permis de faire vivre puis persister l’idéologie « radiolibriste » et New Age au sein de RIM. Mais ajoutons que ce modèle n’aurait pas été possible s’il n’avait pas été porté par des animateurs bénévoles, des invités militants et des auditeurs actifs dont nous analysons ici le profil sociologique. L’intérêt scientifique de ce sujet provient du fait qu’il s’agit principalement d’étudier RIM qui est une ancienne « radio libre ». Elle a été l’une des radios les plus importantes au sein du mouvement. C’est la plus ancienne des radios locales privées parisiennes. C’est aujourd’hui une radio associative de catégorie A. Cette catégorie correspond à un grand nombre de radios (environ 600), mais celles-ci sont peu étudiées. Enfin, c’est une radio New Age et l’un des seuls médias audiovisuels français New Age. Croisant histoire et sociologie du religieux, des médias, de la communication, de la politique, des sciences, cette thèse repose sur une écoute assidue, sur de nombreux entretiens et discussions informelles, sur l’étude de différents fonds d’archives (papier, audio, numérique) et sur de nombreuses observations de type ethnographique. Nous donnons dans une première partie les outils scientifiques pour pouvoir analyser ce phénomène. Nous verrons ensuite dans quel contexte historique, radiophonique, économique, social, juridique et politique RIM fait son apparition et continue d’exister aujourd’hui. Enfin, nous nous focalisons sur le modèle radiophonique proposé, et sur les acteurs de cette radio
In this thesis, we wonder how countercultural movement found new places of expression through the increased accessibility of audiovisual, thanks to "free radio" fight. Specifically, we want to know why and how society and the French media have enabled the establishment of an alternative media like Radio Ici et Maintenant (RIM) and how this radio has found a viable business model to spread its ideology. We shall see that the existence and persistence of RIM is due to the combination of two factors: firstly the reduction in the cost of entry into the radio broadcasting through the development and struggle of "free radio" that gave birth to associative radios (with their specific legal and economic model) and also the decrease in the cost of entering the religious market with the development of the French New Age counterculture issue of the American counterculture, itself the result of religious thoughts Western alternatives (related to the esoteric, the mediumship) and Eastern religions (Hinduism and Buddhism). Thus, the specific legal and economic model of associative radios allowed to live and persist "radiolibriste" and New Age ideology within RIM. But add that this model would not have been possible if it had not been worn by volunteer facilitators, invited activists and active listeners which we analyze the sociological profile. The scientific interest of this subject is the fact that it is mainly to study RIM which is an old "free radio". She was one of the most important radio stations in the movement. It is the oldest Parisian private local radio station. Today, it is a community radio (category A). This category corresponds to a large number of radio stations (about 600), but these are little studied. Finally, this is a New Age radio and one of the only French audiovisual media New Age. Crossing history and sociology of religion, media, communication, politics, science, this thesis is based on a constant listening, on numerous interviews and informal discussions on the study of different archives (paper, audio, digital) and numerous ethnographic observations. We give in the first part scientific tools to analyze this phenomenon. We will then see in which historical, radio, economic, social, legal and political context RIM appeared and continues to exist today. Finally, we focus on the proposed radio model and the actors of this radio
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7

Pirmoradian, Mahdi. "Radio resource management for cognitive radio networks". Thesis, Kingston University, 2012. http://eprints.kingston.ac.uk/23723/.

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Cognitive radio concept is a promising technology to cope with the spectrum scarcity issue in the emerging wireless technology. Practical cognitive radio as an intelligent radio is on the horizon, in which the system is able to observe radio environment, understanding its situation, and adapt its transceiver parameters without disruption to the licensed service. The main given functionality of the cognitive radio is dynamic spectrum management using underlay or overlay spectrum-sharing mechanisms. This thesis studies several objectives in cognitive radio networks namely; cumulative interference in multi-user overlay networks, effective capacity optimisation in time varying imperfect fading channels, and diverse spectrum decision schemes (i.e. Maximum Entropy Channel Access, MECA, and Adaptive Spectrum Opportunity Access, ASOA, schemes) in overlay networks. Also Green Cognitive Radio concept is introduced for enhancing energy efficiency in overlay networks. The cumulative interference at a cell-edge active primary receiver is estimated based on the two scenarios, the broadcast of receiver beacon signal and the broadcast of licensed transmitter beacon signal. In the proposed system topology, the cognitive users are distributed within and outside of the licensed coverage area with constant density. The results indicate that cumulative interference significantly gets low level through the broadcast of receiver beacon signal scenario in comparison with the licensed transmitter scenario. Additionally, optimising effective capacity of a secondary user subject to the interference constraint and transmission power constraint factors, in imperfect fading channels is studied. In this case, cross channel state information is a key factor in adapting transmission power and channel capacity accordingly. The numerical results show that effective capacity is influenced upon increasing cross channel error (secondary transmitter-primary receiver link), and QoS delay items. Moreover, the study is completed by proposing power control policy upon minimising interference level at the licensed receiver subject to the desired effective capacity level and transmission power constraint. Hence, performance of the proposed spectrum decision schemes (MECA, ASOA) is examined and explained by comparison with Random Channel Access (RCA), Minimum Channel Rate (MCR), and First Opportunity Channel Access (FOCA) schemes in the period of simulation time. MECA scheme uses weighted entropy function to assess usefulness of the remaining available idle channels, and so selects appropriate spectrum opportunity for secondary data delivery. The performance reveals that MECA and ASOA can potentially be considered as viable approaches in spectrum selection schemes. Additionally, in the case of GCR aspect an opportunistic power control policy using the remaining idle channel lifetime is proposed to mitigate interference power at the primary receiver. Overall, we develop and propose a unique technique in decreasing total interference in overlay networks; effective capacity optimisation in underlay networks, feasible spectrum selection schemes, and also green cognitive radio concept in the field of dynamic spectrum access networks.
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Moy, Christophe. "Evolution de la conception radio : de la radio logicielle à la radio intelligente". Habilitation à diriger des recherches, Université Rennes 1, 2008. http://tel.archives-ouvertes.fr/tel-00354493.

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Le manuscrit de cette Habilitation à Diriger des Recherches reprend quelques thèmes de mon parcours de recherche depuis 10 ans, et que l'on peut résumer ainsi. De la conception radio classique pendant ma thèse (à base d'ASIC) j'ai vécu la transition vers la conception radio logicielle (dans un laboratoire de recherche d'un grand groupe industriel) et enfin j'étends désormais en parallèle mes travaux vers la conception radio intelligente (dans un laboratoire de recherche académique). Cinq travaux sont repris dans ce mémoire, portant sur la radio logicielle et la radio intelligente. Ils correspondent à cinq des thèses que j'ai encadrées. Ils portent tout d'abord sur la contribution à une approche de conception pragmatique pour la radio logicielle orientée composants. La radio logicielle en effet implique l'utilisation de ressources de traitements multiples et hétérogènes, générant ainsi des difficultés de conception non encore résolues dans leur ensemble par la communauté de l'architecture. L'un des principes repose sur l'indifférence qu'il doit y avoir entre traitements logiciels et matériels, quel que soit leur niveau de reconfigurabilité. Un effort de formalisation de la conception radio logicielle est proposé dans un deuxième temps, dans une approche orientée opérateurs communs. L'idée repose sur la description à différents niveaux de granularité des opérateurs de traitement du signal afin de bénéficier de la réutilisation de motifs de calcul. Le travail d'optimisation consiste à sélectionner le niveau de granularité adéquate suivant les besoins du concepteur. La gestion de reconfiguration, qui est un point central si ce n'est le point distinctif de la radio logicielle est le cœur du troisième travail présenté. Sa généralisation à la radio intelligente permet d'aboutir dans un quatrième cas d'étude à la proposition d'une architecture de gestion radio intelligente : HDCRAM. Une modélisation de cette architecture est proposée sous la forme d'un méta-modèle exécutable. Cela permet notamment de disposer d'un simulateur de scénarios du comportement de l'architecture de gestion d'une radio intelligente et de pouvoir la dimensionner pour chaque scénario. Enfin la dernière étude porte sur la définition du concept de bulle sensorielle radio intelligente qui porte particulièrement sur l'ensemble des capteurs d'un équipement de radio intelligente. Les perspectives de ces travaux sont notamment d'étudier le troisième et dernier élément du cercle cognitif simplifié (après la reconfiguration et les capteurs) qu'est la prise de décision.
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Marlow, Ryan Lane. "Making Radios with GReasy: GNU Radio With FPGAs Made Easy". Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50432.

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Radio technology is rapidly evolving and as processing capabilities and algorithms become more complex, the need for alternative compilation and user interface abstraction increases. Field Programmable Gate Array (FPGA) technology introduces unique reconfigurable hardware architectures that can aid in software defined radio (SDR) design. FPGAs have greater processing capability than traditional general purpose processors (GPP) found in desktop workstations. This work builds on an ongoing project, GReasy, that augments a Linux based open source SDR development platform, GNU Radio, with FPGA processing capabilities. By delegating processing intensive portions of a radio design to the Xilinx Zynq FPGA architecture, the domain of deployable radios by GNU Radio can be broadened. Xilinx Zynq, integrates the FPGA fabric and CPU onto a single chip, which eliminates the need for a controlling host computer; thus, providing a single, portable, low-power, embedded platform. This thesis presents a Zynq capable version of GNU Radio -- an open-source rapid radio deployment tool -- with an enhanced flow that utilizes the processing capability of FPGAs. This work features TFlow -- an FPGA back-end compilation accelerator for instant FPGA assembly. GReasy generates a description of the hardware components that are used by TFlow for the instant FPGA assembly. Once the FPGA is programmed with a design based on the description generated by GReasy, modules and the target hardware can be parameterized to realize an even larger class of applications and further solidify the concept of rapid assembly of software defined radios.
Master of Science
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Ker, Louise Moira. "Radio AGN evolution with low frequency radio surveys". Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7616.

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Supermassive black holes are leading candidates for the regulation of galaxy growth and evolution over cosmic time, via ‘feedback’ processes, whereby outflows from the Active Galactic Nuclei (AGN) halt star formation within the galaxy. AGN feedback is generally thought to occur in two modes, high-excitation (HERG, or ‘quasar-mode’) and low-excitation (LERG or ’radio-mode’) each having a different effect on the host galaxy. LERGs curtail the growth of the most massive galaxies, whereas HERGs are thought to be activated by mergers/interactions, switching off star formation at high redshift. A critical problem in current extragalactic astrophysics lies in understanding the precise physical mechanisms by which these feedback processes operate, and how they evolve over cosmic time. Radio-loud AGN are an essential tool for studying major feedback mechanisms, as they are found within the largest ellipticals, and hence are beacons for the most massive black holes across the bulk of cosmic time. In this thesis I develop and study existing complete radio samples with extensive new multi-wavelength data in the radio, optical and infrared, aiming to investigate the evolution of AGN feedback modes, and methods to locate and study such systems at the very highest redshifts. This will serve to inform further studies of radio-AGN planned with next generation radio instruments such as the LOw Frequency ARray (LOFAR). Very few radio-loud AGN systems are currently known at high redshifts, and the effectiveness of traditional high redshift selection techniques, such as selection based on steep spectral index, have not been well quantified. A purely evidence-based approach to determining the efficiency of various high redshift selection techniques is presented, using nine highly spectroscopically complete radio samples; although weak correlations are confirmed between spectral index and linear size and redshift, selection first of infrared-faint radio sources remains by far the most efficient method of selecting high-z radio galaxies from complete samples. Radio spectral curvature in four of the complete samples is analysed and the effect of radio spectral shape on the measurement of the radio luminosity function (RLF) of steep-spectrum radio sources is investigated. Below z=1, curvature has negligible effect on the measurement of the RLF, however at higher redshifts, where source numbers are low, the shape of the radio spectrum should be taken into account, as individual source luminosities can change up to 0.1-0.2 dex, and this can in some cases introduce errors in space density measurements of up to a factor of 2-3 where source numbers are low. Building upon these samples, the very first independent determinations of the separate RLFs for high and low excitation radio sources across the bulk of cosmic time are made, out to z=1. Here it is shown that HERGs show very clear signs of strong evolution, in line with theoretical predictions. LERGs also show some very weak evolution with redshift, showing increases in space density of typically around a factor of 2. These measurements are also used to estimate the contribution of LERGs, which typically show weak or no emission lines to the ‘missing redshift’ population, which are sources within the complete samples not identifiable spectroscopically. Complementary to this, a pilot study is presented in selecting ‘missing redshift’ sources which are classed as infra-red faint (IFRS), which show no optical or near-IR identification, and are compact in the radio. Follow up spectroscopy on these candidate high z sources detected no line emission. Finally, work carried out towards the testing and commissioning of the new LOFAR telescope is presented. The findings from this thesis will serve to both streamline and inform high redshift radio-AGN searches and studies planned to be carried out with LOFAR and other multi-wavelength complementary surveys in the near future, and help to open up an as yet unexplored epoch in radio-AGN formation and evolution.
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Libros sobre el tema "Radio"

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Rosing, Peter Frederik. Radiormiut: Kalaallit Nunaata Radioa = Grønlands Radio = Radio Greenland. [Nuuk, Greenland]: KNR/Atuakkiorfik, 1998.

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Hill, Jonathan. Radio! Radio! 2a ed. Bampton: Sunrise Press, 1993.

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Riot, Kim. Radio, radio. San Diego, CA: The author, 2006.

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Mulryan, Peter. Radio radio. Dublin: Borderline Publications, 1988.

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Sheridan, Peter. Radio days: Australian bakelite radios. Sydney: Bakelite, 2008.

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Kleinsteuber, Hans J. Radio. Wiesbaden: VS Verlag für Sozialwissenschaften, 2012. http://dx.doi.org/10.1007/978-3-531-93100-5.

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Eason, Andrew. Radio. Bristol: Andrew Eason, 2003.

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Crisfield, Deborah. Radio. New York: Crestwood House, 1994.

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America, Boy Scouts of. Radio. 2a ed. Irving, Tex: Boy Scouts of America, 2001.

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Andrew, Crisell, ed. Radio. New York, NY: Routledge, 2008.

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Capítulos de libros sobre el tema "Radio"

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McNally, Derek. "Radio Astronomy (Radio Astronomie)". En Reports on Astronomy, 449–75. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3364-7_28.

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Wagner, Hans-Ulrich. "Radio". En Faust-Handbuch, 488–92. Stuttgart: J.B. Metzler, 2018. http://dx.doi.org/10.1007/978-3-476-05363-3_56.

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Birdsall, Carolyn. "Radio". En Handbuch Sound, 353–59. Stuttgart: J.B. Metzler, 2018. http://dx.doi.org/10.1007/978-3-476-05421-0_65.

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Cooper, Quentin. "Radio". En Encyclopedia of Science Education, 1–2. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6165-0_210-3.

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Hickethier, Knut. "Radio". En Einführung in die Medienwissenschaft, 288–308. Stuttgart: J.B. Metzler, 2003. http://dx.doi.org/10.1007/978-3-476-05034-2_16.

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Watson, John. "Radio". En Mastering Electronics, 187–206. London: Macmillan Education UK, 1996. http://dx.doi.org/10.1007/978-1-349-14210-1_19.

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Hasebrink, Uwe. "Radio". En Handbuch Populäre Kultur, 359–65. Stuttgart: J.B. Metzler, 2003. http://dx.doi.org/10.1007/978-3-476-05001-4_78.

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Cooper, Quentin. "Radio". En Encyclopedia of Science Education, 819–21. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-2150-0_210.

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Lax, Stephen. "Radio". En Media and Communications Technologies, 30–59. London: Macmillan Education UK, 2009. http://dx.doi.org/10.1007/978-1-137-07644-1_3.

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Schill, Wolfgang. "Radio". En Handbuch Medienpädagogik, 395–401. Wiesbaden: VS Verlag für Sozialwissenschaften, 2008. http://dx.doi.org/10.1007/978-3-531-91158-8_59.

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Actas de conferencias sobre el tema "Radio"

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Palicot, Jacques. "COGNITIVE RADIO FOR GREEN RADIO COMMUNICATIONSGREEN COGNITIVE RADIO". En First International Conference on Telecommunications and Remote Sensing. SCITEPRESS - Science and Technology Publications, 2012. http://dx.doi.org/10.5220/0005413300170017.

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Stephens, Donald R., Cinly Magsombol y Norman Browne. "Network programming of Joint Tactical Radio System radios". En MILCOM 2008 - 2008 IEEE Military Communications Conference (MILCOM). IEEE, 2008. http://dx.doi.org/10.1109/milcom.2008.4753427.

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Trump, Tonu. "A robust eigenvalue ratio detector for cognitive radio". En 2014 International Conference on Digital Signal Processing (DSP). IEEE, 2014. http://dx.doi.org/10.1109/icdsp.2014.6900668.

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Liu, Chang, Yonghong Zeng y Samir Attallah. "Max-To-Mean Ratio Detection for Cognitive Radio". En 2008 IEEE Vehicular Technology Conference (VTC 2008-Spring). IEEE, 2008. http://dx.doi.org/10.1109/vetecs.2008.443.

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Wysocki, Tadeusz y Abbas Jamalipour. "Sharpe ratio based pricing of Cognitive Radio access". En 2011 IEEE Wireless Communications and Networking Conference (WCNC). IEEE, 2011. http://dx.doi.org/10.1109/wcnc.2011.5779148.

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Matei, Dragos y Alina Badescu. "Simulations of a radio interferometer". En 2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO). IEEE, 2017. http://dx.doi.org/10.23919/radio.2017.8242216.

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Manoharan, P. K., Arun Naidu, B. C. Joshi, Jayashree Roy, G. Kate, Kaiwalya Pethe, Shridhar Galande, Sachin Jamadar, S. P. Mahajan y R. A. Patil. "Low Frequency Radio Experiment (LORE)". En 2015 IEEE Radio and Antenna Days of the Indian Ocean (RADIO). IEEE, 2015. http://dx.doi.org/10.1109/radio.2015.7323422.

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"Copyright page". En 2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO). IEEE, 2017. http://dx.doi.org/10.23919/radio.2017.8242203.

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"Title page". En 2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO). IEEE, 2017. http://dx.doi.org/10.23919/radio.2017.8242264.

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Uslenghi, Piergiorgio L. E. "Exact scattering by an elliptical ribbon inside a dihedral reflector". En 2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO). IEEE, 2017. http://dx.doi.org/10.23919/radio.2017.8242248.

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Informes sobre el tema "Radio"

1

Schoening, James R. y J. R. Christian. Soldier's Radio. Fort Belvoir, VA: Defense Technical Information Center, febrero de 1992. http://dx.doi.org/10.21236/ada262474.

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García-González, IM, C. Robles-Andreu y B. Correyero-Ruiz. Management of work teams and radio products in university radios. Revista Latina de Comunicación Social, julio de 2016. http://dx.doi.org/10.4185/rlcs-2016-1116en.

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Carter, M. D. Radio Frequency Current Drive Considerations for Small Aspect Ratio Tori. Office of Scientific and Technical Information (OSTI), enero de 1998. http://dx.doi.org/10.2172/814823.

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Carter, M. D., E. F. Jaeger, D. J. Strickler, P. M. Ryan, D. W. Swain y D. B. Batchelor. Radio frequency current drive considerations for small aspect ratio tori. Office of Scientific and Technical Information (OSTI), julio de 1998. http://dx.doi.org/10.2172/677115.

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Pérez-Alaejos, MPM, M. Martín-Valiente y M. Hernández-Prieto. La programación de contenidos propios en las radios universitarias españolas: Ondacampus, UPV Radio, Unirradio Jaén, Radio Universidad y RUAH. Revista Latina de Comunicación Social, marzo de 2016. http://dx.doi.org/10.4185/rlcs-2016-1096.

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Pérez-Alaejos, MPM, M. Martín-Valiente y M. Hernández-Prieto. Spanish University Radio Stations’ Own Content Programming: Ondacampus, UPV Radio, Uniradio Jaén, Radio Universidad and RUAH. Revista Latina de Comunicación Social, marzo de 2016. http://dx.doi.org/10.4185/rlcs-2016-1096en.

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Shneyderman, YA A. Radio-Absorbing Materials. Fort Belvoir, VA: Defense Technical Information Center, julio de 1985. http://dx.doi.org/10.21236/ada157496.

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Snyder, Wilbert F. y Charles L. Bragaw. Achievement in radio. Gaithersburg, MD: National Bureau of Standards, 1986. http://dx.doi.org/10.6028/nbs.sp.555.

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Jacobson, Joseph. Radio Frequency (RF) Biomolecules. Fort Belvoir, VA: Defense Technical Information Center, noviembre de 2005. http://dx.doi.org/10.21236/ada441170.

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Bose, Vanu G. ITSY Handheld Software Radio. Fort Belvoir, VA: Defense Technical Information Center, octubre de 2001. http://dx.doi.org/10.21236/ada397932.

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