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Microseismic events generate compressive waves and shear waves, which can be recorded at receivers. We present a theory that shows how elastic P and S waves separately back propagate to the origin also urcelocation.These refocused PandS wave fields are free of singularities.We also demonstrate a technique that enhances the ability to image the spatial focus for each wave type using elasti…
- Tahun Terbit
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Investigating dictionary use is not only essential to the process of dictionary compilation and evaluation but equally to establishing a best practice of strategic dictionary consultation. User research of the past few decades has tended to focus either on pedagogical lexicography or the evaluation of specific lexicographic resources. In particular, the proportion of investigations in specialis…
- Tahun Terbit
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Portability of social benefits across professions and countries is an increasing concern for individuals and policy makers. Lacking or incomplete transfers of acquired social rights are feared to negatively impact individual labor market decisions as well as capacity to address social risks with consequences for economic and social outcomes. The paper gives a fresh and provocative look on the i…
- Tahun Terbit
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