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Scattering and Attenuation of Seismic Waves, Part II
Reprint from Pure and Applied Geophysics (PAGEOPH), Volume 131 (1989), No. 4
Botanical Medicine in Clinical Practice
The potential benefits of plants and plant extracts in the treatment and possible prevention of many leading health concerns are historically well known and are becoming more widely studied and recognized within the medical community. It is these studies that led to the first compilation of new research developments, identifying new extracts and uses for plants in disease prevention and treatment. This major comprehensive reference work contains contributions from more than 150 clinical and academic experts covering topics such as treatments of cancer and cardiovascular diseases, as well as historical plant use by indigenous people supported by recent scientific studies. Authors review the safety and efficacy of botanical treatments while idenifying the sources, historical supportive data and mechanisms of action for emerging treatments. Written by researchers currently carrying out identification and biomedical testing, this is the most up to date text on the latest research from all over the world. It is an essential resource for health care practitioners and herbalists, as well as researcher, students and professionals in botany and alternative medicine.
Imaging, Modeling and Assimilation in Seismology
This work presents current approaches in geophysical research of earthquakes. A global authorship from top institutions presents case studies to model, measure, and monitor earthquakes. Among others a full-3D waveform tomography method is introduced, as well as propagator methods for modeling and imaging. In particular the earthquake prediction method makes this book a must-read for researchers in the field.
Annual Report
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Seismic Motion, Lithospheric Structures, Earthquake and Volcanic Sources
Geophysicists use seismic signals to image structures in the Earth's interior, to understand the mechanics of earthquake and volcanic sources, and to estimate their associated hazards. Keiiti Aki developed pioneering quantitative methods for extracting useful information from various portions of observed seismograms and applied these methods to many problems in the above fields. This volume honors Aki's contributions with review papers and results from recent applications by his former students and scientific associates pertaining to topics spawned by his work. Discussed subjects include analytical and numerical techniques for calculating dynamic rupture and radiated seismic waves, stochastic models used in engineering seismology, earthquake and volcanic source processes, seismic tomography, properties of lithospheric structures, analysis of scattered waves, and more. The volume will be useful to students and professional geophysicists alike.
Seismic Wave Propagation and Scattering in the Heterogeneous Earth : Second Edition
Seismic waves - generated both by natural earthquakes and by man-made sources - have produced an enormous amount of information about the Earth's interior. In classical seismology, the Earth is modeled as a sequence of uniform horizontal layers (or spherical shells) having different elastic properties and one determines these properties from travel times and dispersion of seismic waves. The Earth, however, is not made of horizontally uniform layers, and classic seismic methods can take large-scale inhomogeneities into account. Smaller-scale irregularities, on the other hand, require other methods. Observations of continuous wave trains that follow classic direct S waves, known as coda waves,...
Monitoring the Comprehensive Nuclear-Test-Ban Treaty: Seismic Event Discrimination and Identification
In September 1996, the United Nations General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty (CTBT), prohibiting nuclear explosions worldwide, in all environments. The treaty calls for a global verification system, including a network of 321 monitoring stations distributed around the globe, a data communications network, an international data center, and onsite inspections, to verify compliance. The problem of identifying small-magnitude banned nuclear tests and discriminating between such tests and the background of earthquakes and mining-related seismic events, is a challenging research problem. Because they emphasize CTBT verification research, the 12 papers in this special vo...
Monitoring the Comprehensive Nuclear-Test-Ban Treaty
Regional seismograms are dominated by the phases Pn, Pg, Sn, and Lg. More often Sn and Lg are used to infer the attenuation structure of the lithosphere. The seismic phase Sn is a high-frequency shear-wave (typically from 1 to 4 Hz and occasionally higher) that travels in the lithospheric mantle above the negative velocity gradient which usually marks the lithosphere-asthenosphere boundary. Sn has been reported out to distances of 35° (e. g. , MOLNAR and OLIVER, 1969; HUESTIS et aI. , 1973). Sn arrives as a high-frequency wave train lasting tens of seconds and up to 1 to 2 minutes. Sn velocities are typically 4. 7 km/s in stable continental and oceanic lithosphere (HUESTIS et al. , 1973) an...
Wave Propagation in Complex Media
This IMA Volume in Mathematics and its Applications WAVE PROPAGATION IN COMPLEX MEDIA is based on the proceedings of two workshops: • Wavelets, multigrid and other fast algorithms (multipole, FFT) and their use in wave propagation and • Waves in random and other complex media. Both workshops were integral parts of the 1994-1995 IMA program on "Waves and Scattering." We would like to thank Gregory Beylkin, Robert Burridge, Ingrid Daubechies, Leonid Pastur, and George Papanicolaou for their excellent work as organizers of these meetings. We also take this opportunity to thank the National Science Foun dation (NSF), the Army Research Office (ARO, and the Office of Naval Research (ONR), whos...
