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1. |
Record Nr. |
UNINA9910786125803321 |
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Autore |
Douglas Alan <1936-> |
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Titolo |
Forensic seismology and nuclear test bans / / Alan Douglas |
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Pubbl/distr/stampa |
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Cambridge : , : Cambridge University Press, , 2013 |
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ISBN |
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1-107-32710-5 |
1-107-23830-7 |
1-107-33686-4 |
1-107-33275-3 |
1-107-33354-7 |
1-107-33520-5 |
1-299-40327-1 |
1-107-33603-1 |
1-139-52400-3 |
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Descrizione fisica |
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1 online resource (xliii, 514 pages) : digital, PDF file(s) |
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Disciplina |
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Soggetti |
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Underground nuclear explosions - Detection |
Nuclear weapons - Testing - Detection |
Seismic waves - Analysis |
Seismology |
Nuclear arms control - Verification |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Title from publisher's bibliographic system (viewed on 05 Oct 2015). |
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Nota di bibliografia |
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Includes bibliographical references and indexes. |
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Nota di contenuto |
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Contents; Preface; Abbreviations and mathematical symbols; Abbreviations; Seismological stations; Mathematical symbols; Prologue; Forensic seismology and UK policy on a CTBT; 1 Seismology: ancient and modern; 1.1 The long march begins; 1.2 Seismic signals and noise; 1.3 Seismometers; 1.4 Seismometer arrays; 1.5 Identification; 1.6 Epicentres and OSIs; 1.7 Seismograms and seismological bulletins; 1.8 Earth models and seismic sources; 1.9 Seismic source size and explosion yield; 1.10 The International Monitoring System (IMS); 1.11 Scope of the book |
2 Statistical solutions to seismological problems2.1 Introduction; 2.2 The method of least squares; 2.2.1 Linear least squares; 2.2.2 |
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Generalized least squares; 2.2.3 Least squares with constraints; 2.2.4 Non-linear least squares - hypocentre estimation from P-wave arrival times; 2.2.5 Confidence limits and significance tests; 2.3 Maximum-likelihood estimators; 2.4 Weighting; 3 Seismograms as time series; 3.1 Introduction; 3.2 Analogue and digital beamforming; 3.3 Fourier spectra; 3.4 Digital filtering; 3.5 Least squares estimation of approximate filters |
3.6 Modelling and measuring the effects of anelastic attenuation3.7 The Hilbert transform and its uses; 3.8 Seismogram synthesis as filtering; 3.9 Group and phase speed; 3.10 Noise analysis; 3.11 Signals and noise in frequency/wave-number space; 4 Seismographs and seismograms; 4.1 Introduction; 4.2 Direct-reading seismometers without feedback; 4.3 The velocity transducer without feedback; 4.3.1 The response of seismometer--amplifier systems; 4.3.2 LP seismometers; 4.3.3 Calibration; 4.4 Miniature broad-band seismometers; 4.4.1 System noise; 4.4.2 The AWE--Guralp borehole seismometer |
4.4.3 Borehole operation4.5 Sources of seismic noise; 4.6 Siting seismographs; 4.7 Estimating broad-band signals from SP recordings; 4.8 Recording systems for forensic seismology; 5 Seismometer arrays and processing methods; 5.1 Introduction; 5.2 Optimum array processing for four noise models; 5.3 Array sum response in frequency/wave-number space; 5.3.1 Line arrays; 5.3.2 UK-type arrays; 5.3.3 The correlator response; 5.4 Wave-number filtering; 5.4.1 Signals and noise at EKA; 5.4.2 Estimating MP filters and measuring their effectiveness; 5.5 Automatic processing |
5.5.1 Errors due to spatial aliasing in array estimates of vector slowness5.6 The design and performance of the UK-type arrays; 5.7 Performance of other arrays; 5.8 Future of arrays for signal extraction; 5.9 Using arrays to measure travel-time gradients; 5.9.1 Single-array methods; 5.9.2 Multiple-array methods; 5.9.3 dT/d and phase identification; 6 Seismogram interpretation and synthesis; 6.1 Introduction; 6.2 Synthesizing P seismograms; 6.2.1 P seismograms from earthquakes; 6.2.2 P seismograms from explosions; 6.3 Analysis and synthesis of surface-wave seismograms |
6.3.1 Measuring dispersion: analyst methods |
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Sommario/riassunto |
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With the signing in 1996 of the Comprehensive Nuclear Test Ban Treaty, interest has grown in forensic seismology: the application of seismology to nuclear test ban verification. This book, based on over 50 years of experience in forensic seismology research, charts the development of methods of seismic data analysis. Topics covered include: the estimation of seismic magnitudes, travel-time tables and epicentres; seismic signal processing; and the use of seismometer arrays. Fully illustrated with seismograms from explosions and earthquakes, the book demonstrates methods and problems of visual analysis. Each chapter provides exercises to help the reader familiarise themselves with practical issues in the field of forensic seismology, and figures and solutions to exercises are also available online. The book is a key reference work for academic researchers and specialists in the area of forensic seismology and Earth structure, and will also be valuable to postgraduates in seismology and solid earth geophysics. |
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2. |
Record Nr. |
UNINA9910824476103321 |
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Autore |
Sallabank Julia |
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Titolo |
Attitudes to endangered languages : identities and policies / / Julia Sallabank [[electronic resource]] |
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Pubbl/distr/stampa |
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Cambridge : , : Cambridge University Press, , 2013 |
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ISBN |
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1-139-89225-8 |
1-107-70279-8 |
1-107-70173-2 |
1-107-66693-7 |
1-107-68978-3 |
1-139-34416-1 |
1-107-70373-5 |
1-107-59823-0 |
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Descrizione fisica |
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1 online resource (xiv, 271 pages) : digital, PDF file(s) |
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Classificazione |
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Disciplina |
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Soggetti |
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Language obsolescence |
Language maintenance |
Language attrition |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Title from publisher's bibliographic system (viewed on 05 Oct 2015). |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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1. Language endangerment, language revitalisation and language policy; 2. Small islands on the periphery of Britain; 3. Researching language attitudes and ideologies; 4. Local language practices on a small island in the twenty-first century; 5. Language attitudes, ideologies and identity on a small island; 6. Language planning and policy: bottom-up and top-down; 7. Implications. |
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Sommario/riassunto |
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Language attitudes and ideologies are of key importance in assessing the chances of success of revitalisation efforts for endangered languages. However, few book-length studies relate attitudes to language policies, or address the changing attitudes of non-speakers and the motivations of members of language movements. Through a combination of ethnographic research and quantitative surveys, this book presents an in-depth study of revitalisation efforts for indigenous |
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languages in three small islands round the British Isles. The author identifies and confronts key issues commonly faced by practitioners and researchers working in small language communities with little institutional support. This book explores the complex relationship of ideologies, identity and language-related beliefs and practices, and examines the implications of these factors for language revitalisation measures. Essential reading for researchers interested in language endangerment and revitalisation, sociolinguistics, linguistic anthropology and language policy and planning, as well as language planners and campaigners. |
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