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Interferometry and Synthesis in Radio Astronomy

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Book Series: Astronomy and Astrophysics Library ISSN: 0941-7834 ISBN: 9783319444291 9783319444314 Year: Pages: 872 DOI: 10.1007/978-3-319-44431-4 Language: English
Publisher: Springer Nature
Subject: Electrical and Nuclear Engineering --- Astronomy (General)
Added to DOAB on : 2017-04-11 12:00:19
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The third edition of this indispensable book in radio interferometry provides extensive updates to the second edition, including results and technical advances from the past decade; discussion of arrays that now span the full range of the radio part of the electromagnetic spectrum observable from the ground, 10 MHz to 1 THz; an analysis of factors that affect array speed; and an expanded discussion of digital signal-processing techniques and of scintillation phenomena and the effects of atmospheric water vapor on image distortion, among many other topics.With its comprehensiveness and detailed exposition of all aspects of the theory and practice of radio interferometry and synthesis imaging, this book has established itself as a standard reference in the field. It begins with an overview of the basic principles of radio astronomy, a short history of the development of radio interferometry, and an elementary discussion of the operation of an interferometer. From this foundation, it delves into the underlying relationships of interferometry, sets forth the coordinate systems and parameters to describe synthesis imaging, and examines configurations of antennas for multielement synthesis arrays. Various aspects of the design and response of receiving systems are discussed, as well as the special requirements of very-long-baseline interferometry (VLBI), image reconstruction, and recent developments in image enhancement techniques and astrometric observations. Also discussed are propagation effects in the media between the source and the observer, and radio interference, factors that limit performance. Related techniques are introduced, including intensity interferometry, optical interferometry, lunar occultations, tracking of satellites in Earth orbit, interferometry for remote Earth sensing, and holographic measurements of antenna surfaces. This book will benefit anyone who is interested in radio interferometry techniques for astronomy, astrometry, geodesy, or electrical engineering.

Keywords

astronomy --- physics --- communications --- radio --- engineering

From monologue to dialogue; Radio and reform in Indonesia

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Book Series: Verhandelingen van het Koninklijk Instituut voor Taal-, Land- en Volkenkunde ISBN: 9789067183543 9789004253834 Year: Volume: 264 Pages: vi+190 DOI: 10.26530/OAPEN_377413 Language: English
Publisher: Brill
Subject: Social Sciences
Added to DOAB on : 2011-11-04 00:00:00
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From monologue to dialogue; Radio and reform in Indonesia analyses how radio journalism since the late 1990s has been shaped by and contributed to Reformasi, or the ambition of democratizing Indonesian politics, economy and society. The book examines ideas and practices such as independent journalism, peace journalism, meta-journalism, virtual interactivity, talk-back radio and community radio, which have all been designed to renew audience interest in media and societal affairs. It pays special attention to radio programmes that enable hosts, experts, listeners and other participants to discuss and negotiate the very rules and boundaries of Indonesia’s newly acquired media freedom. The author argues that these contemporary programmes provide dialogic alternatives to the official New Order discourse dominated by monologism. Edwin Jurriëns is Lecturer in Indonesian Language and Culture at the University of New South Wales, Canberra, Australia. He is author of Cultural travel and migrancy; The artistic representation of globalization in the electronic media of West Java (KITLV, 2004) and co-editor of Cosmopatriots; On distant belongings and close encounters (Rodopi, 2007

Nazi Soundscapes

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ISBN: 9789089644268 Year: Pages: 272 DOI: 10.26530/OAPEN_424532 Language: English
Publisher: Amsterdam University Press
Subject: Media and communication --- Political Science --- Social Sciences
Added to DOAB on : 2012-08-25 18:56:22
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Following the formation of the German National Socialist Party in the 1920s, various forms of sound (popular music, voice, noise and silence) and media technology (radio and loudspeaker systems) were configured as useful to the party's political programme. Focusing on the urban "soundscape" of Düsseldorf, the author makes a persuasive case for investigating such sound events and technological devices in their specific contexts of production and reception. Nazi Soundscapes identifies strategies for controlling space and reworking identity patterns, but also the ongoing difficulties in manipulating mediated sounds and the spaces of listening reception, whether in the home, workplace, the cinema, public rituals or with wartime siren systems. The study revises visualist notions of social control, and reveals the disciplinary functions of listening (as eavesdropping) as well as the sonic dimensions to exclusion and violence during Nazism. An essential title for everyone interested in the links between German political culture, audiovisual media and urban history, Nazi Soundscapes provides a fascinating analysis of the cultural significance of sound between the 1920s and early 1940s. Click "http://soundclips.humanities.uva.nl/">here for the sound clips discussed in the book.

Soundscapes of the Urban Past

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Book Series: Sound Studies ISBN: 9783837621792 9783839421796 Year: DOI: 10.26530/oapen_627788 Language: English
Publisher: transcript Verlag Grant: Knowledge Unlatched - 100511
Subject: Music
Added to DOAB on : 2017-04-21 11:01:49
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We cannot simply listen to our urban past. Yet we encounter a rich cultural heritage of city sounds presented in text, radio and film. How can such 'staged sounds' express the changing identities of cities? This volume presents a collection of studies on the staging of Amsterdam, Berlin and London soundscapes in historical documents, radio plays and films, and offers insights into themes such as film sound theory and museum audio guides. In doing so, this book puts contemporary controversies on urban sound in historical perspective, and contextualises iconic presentations of cities. It addresses academics, students, and museum workers alike. With contributions by Jasper Aalbers, Karin Bijsterveld, Carolyn Birdsall, Ross Brown, Andrew Crisell, Andreas Fickers, Annelies Jacobs, Evi Karathanasopoulou, Patricia Pisters, Holger Schulze, Mark M. Smith and Jonathan Sterne.

Keywords

Music --- Soundscape --- Media --- Culture --- Museum --- History --- Radio --- Film --- Sound --- Urbanity --- Cultural History --- Urban Studies --- Musicology

Transnationalizing Radio Research

Authors: ---
Book Series: Edition Medienwissenschaft ISBN: 9783839439135 Year: Pages: 314 DOI: 10.14361/9783839439135 Language: English
Publisher: transcript Verlag
Subject: Media and communication
Added to DOAB on : 2019-01-15 13:34:01
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Transnationalizing Radio Research presents a theoretical and methodological guide for exploring radio's multiple »global ages«, from its earliest years through its recent digital transformations. It offers radio scholars theoretical tools and concrete case studies for moving beyond national research frames. It gives radio practitioners inspiration for production and archiving, and offers scholars from many disciplines new ways to incorporate radio's vital voices into work on transnational institutions, communities, histories and identities.

Millimeter-Wave Radio-over-Fiber Links based on Mode-Locked Laser Diodes

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Book Series: Karlsruher Forschungsberichte aus dem Institut für Hochfrequenztechnik und Elektronik ISSN: 18684696 ISBN: 9783866449862 Year: Volume: 68 Pages: XXIII, 241 p. DOI: 10.5445/KSP/1000032868 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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Radio communications in the range of 60 GHz enable multi-Gigabit/s network access in indoor environments. Due to the propagation characteristics of such signals only very short range radio transmission is feasible. In order to distribute these signals across large distances, analog transmission over optical fiber is considered. In this work, mode-locked laser diodes serve as optoelectronic oscillators for the generation of such signals. Their system-relevant properties are studied in detail.

Personalized Multi-Scale Modeling of the Atria: Heterogeneities, Fiber Architecture, Hemodialysis and Ablation Therapy

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Book Series: Karlsruhe transactions on biomedical engineering / Ed.: Karlsruhe Institute of Technology / Institute of Biomedical Engineering ISSN: 18645933 ISBN: 9783866449480 Year: Volume: 19 Pages: XVI, 297 p. DOI: 10.5445/KSP/1000031226 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:02
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This book targets three fields of computational multi-scale cardiac modeling. First, advanced models of the cellular atrial electrophysiology and fiber orientation are introduced. Second, novel methods to create patient-specific models of the atria are described. Third, applications of personalized models in basic research and clinical practice are presented. The results mark an important step towards the patient-specific model-based atrial fibrillation diagnosis, understanding and treatment.

SAR Prediction and SAR Management for Parallel Transmit MRI

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Book Series: Karlsruhe transactions on biomedical engineering / Ed.: Karlsruhe Institute of Technology / Institute of Biomedical Engineering ISSN: 18645933 ISBN: 9783866448001 Year: Volume: 16 Pages: VIII, 124 p. DOI: 10.5445/KSP/1000025607 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:02
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Parallel transmission enables control of the RF field in high-field Magnetic Resonance Imaging (MRI). However, the approach has also caused concerns about the specific absorption rate (SAR) in the patient body. The present work provides new concepts for SAR prediction. A novel approach for generating human body models is proposed, based on a water-fat separated MRI pre-scan. Furthermore, this work explores various approaches for SAR reduction.

Radio Occultation Method for Remote Sensing of the Atmosphere and Ionosphere

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ISBN: 9789537619602 Year: Pages: 176 DOI: 10.5772/151 Language: English
Publisher: IntechOpen
Subject: Geography
Added to DOAB on : 2019-10-03 07:51:48

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The book is devoted to radio occultation (RO) remote sensing of the earth’s atmosphere and ionosphere as a global method of monitoring. This technique used the radio links satellite-to-satellite when a satellite-receiver setting or rising behind the earth’s atmosphere is relative to a satellite - emitter of radio waves. During setting the radio ray perigee moves through the ionosphere and ionosphere. Atmospheric and ionospheric effects arise in most cases owing to influence of a zone near the radio ray perigee and cause significant variations of the amplitude, phase, and frequency of the radio waves. These variations enable determination of the altitude profiles of temperature, pressure, refractivity, density, humidity and turbulence in the atmosphere, distribution of the electron density in the ionosphere, and the wave phenomena at different altitudes with a global coverage. The aim of this book consists of the systematic description of the different approaches, results of investigation and perspectives of the RO remote sensing as a tool for investigations of the atmosphere and ionosphere.

Speechsong

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ISBN: 9781950192496 9781950192502 Year: Pages: 154 DOI: 10.21983/P3.0267.1.00 Language: English
Publisher: punctum books
Subject: Music
Added to DOAB on : 2020-02-07 11:21:03
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"Speechsong is a work of imaginative musicology that addresses the engimas of Schoenberg and Gould, of singing and speaking, of Moses und Aron, of technology and being. Its point of departure is Gould’s last public performance, given at the Wilshire Ebell Theatre in Los Angeles, where a number of Schoenberg’s works were performed during his California exile. It is here, after that last performance, that Gould encounters a spectral Schoenberg in a staged conversation that explores Schoenberg’s travails in rethinking the fundamentals of Western music. This first part of Speechsong recalls Schoenberg’s operatic masterpiece, Moses und Aron, in which the divinely inspired Moses seeks the help of his brother to relate his vision: Moses speaks and Aron sings. Written as a twelve-tone composition, the opera produces an involution of harmonics that was Schoenberg’s response to Richard Wagner’s diatribes about synagogue noise. For Gould, Schoenberg’s is a formalist revolution; Schoenberg’s life, however, suggests that it was a search for personal and political freedom. The second half of Speechsong is a critical essay in twelve “moments” that re-articulates the staged conversation as an inquiry into the intersections of music and mediation. Gould’s turn to the recording studio emerges as a post-humanist inquiry into recorded music as a repudiation of the virtuoso tradition and a liberation from unitary notions of selfhood. Schoenberg’s exodus from musical tradition likewise takes his twelve-tone invention beyond musical performance, where it emerges, along with Gould’s soundscapes, as a prototype of acoustic installations by artists such as Stephen Prina and Cory Arcangel. In these works, music abandons the concert hall and the exigencies of harmony for an acoustic space that embraces at once the recordings of Gould and the performances of Schoenberg that have found their home on the internet."

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