| |
|
|
|
|
|
|
|
|
1. |
Record Nr. |
UNINA9910678262203321 |
|
|
Titolo |
Converged Radio, Youth and Urbanity in Africa : Emerging trends and perspectives / / edited by Stanley Tsarwe, Sarah Chiumbu |
|
|
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Cham : , : Springer International Publishing : , : Imprint : Palgrave Macmillan, , 2023 |
|
|
|
|
|
|
|
|
|
ISBN |
|
|
|
|
|
|
|
|
Edizione |
[1st ed. 2023.] |
|
|
|
|
|
Descrizione fisica |
|
1 online resource (261 pages) |
|
|
|
|
|
|
Disciplina |
|
|
|
|
|
|
|
|
Soggetti |
|
Radio broadcasting |
Internet - Social aspects |
Digital media |
Ethnology - Africa |
Culture |
Radio |
Internet Studies |
Digital and New Media |
African Culture |
|
|
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
Nota di bibliografia |
|
Includes bibliographical references and index. |
|
|
|
|
|
|
Nota di contenuto |
|
Chapter 1. Introduction: Converged radio in Africa -- Chapter 2. New wine in old wineskins? Podcasting and elite youthful voices in Southern Africa -- Chapter 3. Converged Youth Radio as a Social Mission: The role of radio among marginalised youth communities in Zimbabwe. Chapter 4. Campus Radio in the Digital Era: The case of UNESWA FM -- Chapter 5. Social Media Integration in South Africa's Western Cape Community Radio Stations: A case study of Zibonele FM, Bush Radio and Radio Tygerberg -- Chapter 6. Misunderstanding Youth Engagement: The role of commercial youth radio in promoting democracy -- Chapter 7. Radio as Self-Expression and the Limits of Public Debate -- Chapter 8. Between Social Media Virality and Radio Virality: Nigerian youth's preferred medium of participation in national |
|
|
|
|
|
|
|
|
|
|
|
discource. Chapter 9. An Alternative Arena for 'Communities of Resistance'? Podcasting, democratic spaces and counterpublics in Zimbabwe -- Chapter 10. The Influence of Radio Programmes on Youth Empowerment in Abeokuta Metropolis: A case study of Ogbc 2 90.5 FM's Asiko Awon youth -- Chapter 11. Youth, Converged Radio and Participatory Politics in Zimbabwe: The case of young adults in Harare. Lazarus Sauti and Tendai Makaripe -- Chapter 12. Radio on Web and Mobile Platforms: Increased youth participation and practices?. Chapter 13. 'Mobile Radio' and Youth Identity Formation in Harare -- Chapter 14. The Language of Audience Engagement in Converged Radio through Facebook and Twitter: A case of NRG Radio and Ghetto Radio in Nairobi, Kenya -- Chapter 15. Strategic Diversion and Commercial Exploitation: The dumbing down of youth radio programming in Zimbabwe -- Chapter 16. Urban Community Radio and the Making of Apolitical Youth: Ethiopia in Focus. |
|
|
|
|
|
|
Sommario/riassunto |
|
This book explores the convergence of urban radio with digital media technologies in Africa, focusing on how youth are riding on the rapid (though uneven) internet rollout on the continent to participate and drive the production and consumption of urban radio. With thirteen original chapters, the book sheds new light on the changing landscape of radio in a diverse set of African countries, illustrated with rich case studies from Zimbabwe, South Africa, Eswatini, Nigeria and Kenya. This book covers the following themes: youth agency and cultural power; civic engagement and political participation; youth, identity and belonging; youth cultural expressions as well as the impact of capitalist imperatives on commercial radio programing in Africa. Vibrant and innovative, Converged Radio, Youth and Urbanity in Africa reveals the creation of a new public sphere, through which African youth project their voices and identities, participating in and shaping national discourse. Stanley Tsarwe (PhD Rhodes University) lectures Journalism at the University of Zimbabwe. He is a Senior Research Associate in the Faculty of Humanities with University of Johannesburg. His research interests are at the intersection between smart phones, the internet and talk radio. Prof Sarah Chiumbu is Associate Professor in the Department of Communication and Media in the School of Communication, University of Johannesburg, South Africa. Her research interests are in media, democracy, citizenship and representation. . |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2. |
Record Nr. |
UNINA9911004815203321 |
|
|
Autore |
Wolfe William L |
|
|
Titolo |
Introduction to infrared system design / / William L. Wolfe |
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Bellingham, Wash., : SPIE Optical Engineering Press, c1996 |
|
|
|
|
|
|
|
ISBN |
|
1-61583-740-X |
0-8194-7853-9 |
|
|
|
|
|
|
|
|
Descrizione fisica |
|
1 online resource (146 p.) |
|
|
|
|
|
|
Collana |
|
Tutorial texts in optical engineering ; ; v. TT 24 |
|
|
|
|
|
|
Disciplina |
|
|
|
|
|
|
Soggetti |
|
Infrared equipment - Design and construction |
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
Note generali |
|
Description based upon print version of record. |
|
|
|
|
|
|
Nota di bibliografia |
|
Includes bibliographical references (p. 126-129) and index. |
|
|
|
|
|
|
Nota di contenuto |
|
1. Introduction -- 2. Applications overview -- 3. Review of geometric optics -- Rays, beams, and pencils -- The laws of reflection and refraction -- Gaussian optics -- Paraxial optics -- Stops and pupils -- Optical speed -- Aberrations -- Combinations of aberrations -- 4. Review of radiometry -- Angle and solid angle -- Spectral terms -- Radiometric terms -- Radiometric transfer -- 5. Detector parameters -- Detector descriptions -- Detector noises -- Detector types -- Detector arrays -- 6. The infrared system -- Description of the infrared system -- Sensitivity equations -- The emitted and reflected scene -- 7. Atmospheric transmission and Radiation -- Overview -- High-resolution spectra -- Calculational methods -- Procedures -- MODTRAN. |
8. Evaluation of the infrared scene -- Evaluation of the scene SNR -- The nature of the infrared scene -- 9. Bandwidth and scan strategies -- Information bandwidth -- Time delay and integration -- Optimizing scan patterns -- The bow-tie effect -- The Palmer scan -- Effective noise bandwidth -- 10. Optical materials -- Types of materials -- Selection criteria -- Reflection and transmission -- Absorption -- Refractive materials -- Mirrors -- Glass vs. metals and composites -- 11. Some optical systems -- Single-mirror systems -- Two-mirror systems -- Three-mirror systems -- Schmidt systems -- Bouwers-Maksutov systems -- Reflecting relays -- 12. Scanning systems -- The plane parallel plate -- Refracting polygon scanners -- Risley prism scanners -- Rotating flats and axe-blade reflecting scanners -- The |
|
|
|
|
|
|
|
|
|
|
|
reflecting polygon scanner (carousel) -- The Kennedy split-aperture scanner -- Image-space scanners -- Narcissus -- 13. Real-time imager descriptions -- Contrast and modulation -- Spatial frequency -- Modulation transfer functions -- Minimum resolvable temperature difference -- Limitations and other figures of merit -- MTFs for diffraction-limited systems -- 14. Design examples -- The design process -- A night-driving imager -- ICBM interceptors -- A Peacekeeper detector -- Summary. |
|
|
|
|
|
|
Sommario/riassunto |
|
This Tutorial Text focuses on the optics and detector aspects of infrared system design. It introduces the terminology, processes, and instrument design techniques available to engineers today. Design examples are based on real problems investigated by the author during his 30 years of experience as an industrialist, teacher, and consultant. |
|
|
|
|
|
|
|
| |