Development of Regional Discriminants PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Development of Regional Discriminants PDF full book. Access full book title Development of Regional Discriminants by Don V. Helmberger. Download full books in PDF and EPUB format.
Author: Don V. Helmberger
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Get Book Here
Book Description
With the installation of broadband, high dynamic range instruments, it has become possible to compare the regional waveforms of earthquakes and explosions at magnitudes 3 to 6. These waveforms are similar for event sequences in many situations and can be inverted for source mechanisms. We find that flat-layered models are sufficient for inverting seismograms at periods greater than a few seconds. This paper presents three studies aimed at determining crustal models, source finiteness and modeling complex structure near a receiver. We have conducted a set of sensitivity tests on the parameters of 1-D models to compare their impact on different segments of regional seismograms. We found that P sub nl waves (extended P-waves) are controlled in broadband character by the mid-crust while the top layer contributes to the long-period motions. The SV wave is mostly controlled by the shear wave velocity of the lower crust, especially the crustal layer just below the source depth. The top crustal layer controls the shape of the surface waves at ranges from 300 to 600 km, and the upper crust, especially the crustal layer just above the source depth, controls their timing. Applying these tests in modeling three earthquakes in the Basin-and-Range province, we found that a simple two-layer crustal model could effectively explain the data both in timing and in shape. The main crustal layer has P and S velocities of 6.1 km/sec and 3.6 km/sec, similar to those found by Langston and Helmberger (1974). A surface layer of thickness 2.5 to 3.5 km is required to fit the Rayleigh waves. Fast estimation of point-source parameters for earthquakes has witnessed much progress in recent years due to the development of broadband seismic networks.
Author: Don V. Helmberger
Publisher:
ISBN:
Category :
Languages : en
Pages : 10
Get Book Here
Book Description
With the installation of broadband, high dynamic range instruments, it has become possible to compare the regional waveforms of earthquakes and explosions at magnitudes 3 to 6. These waveforms are similar for event sequences in many situations and can be inverted for source mechanisms. We find that flat-layered models are sufficient for inverting seismograms at periods greater than a few seconds. This paper presents three studies aimed at determining crustal models, source finiteness and modeling complex structure near a receiver. We have conducted a set of sensitivity tests on the parameters of 1-D models to compare their impact on different segments of regional seismograms. We found that P sub nl waves (extended P-waves) are controlled in broadband character by the mid-crust while the top layer contributes to the long-period motions. The SV wave is mostly controlled by the shear wave velocity of the lower crust, especially the crustal layer just below the source depth. The top crustal layer controls the shape of the surface waves at ranges from 300 to 600 km, and the upper crust, especially the crustal layer just above the source depth, controls their timing. Applying these tests in modeling three earthquakes in the Basin-and-Range province, we found that a simple two-layer crustal model could effectively explain the data both in timing and in shape. The main crustal layer has P and S velocities of 6.1 km/sec and 3.6 km/sec, similar to those found by Langston and Helmberger (1974). A surface layer of thickness 2.5 to 3.5 km is required to fit the Rayleigh waves. Fast estimation of point-source parameters for earthquakes has witnessed much progress in recent years due to the development of broadband seismic networks.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 86
Get Book Here
Book Description
Most regional discriminants developed to date have been based purely on empirics, and many rely on the characteristics of spectra. At Woodward Clyde, a unique type of time domain discriminant has been developed based on a theoretical understanding of wave propagation and the direct identification of depth phases in P sub n and Pg. This work has involved original basic research into the nature of the short period P sub n waveform and the effect of pP sub n on it; development of an understanding of the nature of P sub n propagation; and inquiries into the relation of pP sub n and spall. The studies of Pg have involved identification of a frequency band in which the waveform is stable; a forward modeling study of NTS regional data; and a careful breakdown of the wavenumber integration synthetics into the generalized rays that compose them. This work has led to direct identification of depth phase effects in Pg and a preliminary indication of how to detect and discriminate with them. This is the first report on a multi-year effort to complete development of the P discriminants, to extend the technology to S sub n and Sg and to test the power of the discriminants on the new data bases from the Soviet Union. Strong efforts to analyze the new data from the Soviet Union have been undertaken including studies of both the older hand digitized analog records and of the digital data from the new IRIS stations.
Author: Elisabeta Jaba
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
The evaluation of the degree of regional economic development within the context of European integration has become extremely important. That is why it is essential to underline the extent to which the degree of economic development corresponds to the standards of integration. In our study, we have used the discriminant analysis to identify the degree of development of the counties, as well as to classify them. By this method, we have calculated the scores of the importance of variables which determine the degree of development. Based on these scores, the development groups have been identified. The counties have been classified according to the level of economic development, by using the coefficients of the estimated discriminant function. The results of our study can be used as arguments in making decisions regarding the achievement of conditions for European integration. The macroeconomic statistical data at the county level were taken from the official statistics. The data analysis was achieved by using SPSS software.
Author: Gábor Lux
Publisher: Taylor & Francis
ISBN: 1317123948
Category : Political Science
Languages : en
Pages : 341
Get Book Here
Book Description
Twenty-five years into transformation, Central and Eastern European regions have undergone substantial socio-economic restructuring, integrating into European and global networks and producing new patterns of regional differentiation and development. Yet post-socialist modernisation has not been without its contradictions, manifesting in increasing social and territorial inequalities. Recent studies also suggest there are apparent limits to post-socialist growth models, accompanying a new set of challenges within an increasingly uncertain world. Aiming to deliver a new synthesis of regional development issues at the crossroads between ‘post-socialism’ and ‘post-transition’, this book identifies the main driving forces of spatial restructuring in Central and Eastern Europe, and charts the different regional development paths which take shape against the backdrop of post-crisis Europe. A comparative approach is used to highlight common development challenges and the underlying patterns of socio-economic differentiation alike. The issues investigated within the Handbook extend to a discussion of the varied economic consequences of transition, the social structures and institutional systems which underpin development processes, and the broadly understood sustainability of Central and Eastern Europe’s current development model. This book will be of interest to academics and policymakers working in the fields of regional studies, economic geography, development studies and policy.
Author: Surendra Singh
Publisher: Routledge
ISBN: 1315393409
Category : Business & Economics
Languages : en
Pages : 334
Get Book Here
Book Description
Agriculture productivity, growth and regional change in post-colonial India from a spatial perspective are yet to be rigorously examined. In particular, the impacts of economic liberalisation, globalisation and deregulation are not being empirically investigated at a small-area level using advanced statistical and spatial techniques. Understanding the process of regional formation and the rapid transitioning of agricultural landscapes in the Post-Liberalisation phase is pivotal to developing and devising regional economic development strategies. This book employs advanced methods to empirically examine the key characteristics and patterns of regional change in agricultural growth and productivity. It offers insights on changes in agricultural production and practices since the colonial period through to the Post-Liberalisation phase in India. It also incorporates the key public policy debates on the progress of India’s agricultural development with the aim of formulating spatially integrated strategies to reduce rapid rise in the regional convergence and to promote equitable distribution of strategic government investment.
Author: Henri L. F. de Groot
Publisher: Edward Elgar Publishing
ISBN: 9781781959602
Category : Business & Economics
Languages : en
Pages : 370
Get Book Here
Book Description
'Entrepreneurship had been high on the jobs growth and economic development agendas for many years and this edited book makes an important and timely contribution to the debate. . . the book is nicely poised to bring together space, innovation and economic growth linked together with entrepreneurship. . . This book provides an excellent and worthwhile insight into many of the issues with many contributions that significantly add to our understanding of entrepreneurship and regional development.' - Ronald W. McQuaid, Growth & Change
Author: Brion Richard Sasaki
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 314
Get Book Here
Book Description
Author: James Fincher
Publisher:
ISBN:
Category : Discriminant analysis
Languages : en
Pages : 16
Get Book Here
Book Description
Author: Panel on Basic Research Requirements in Support of Comprehensive Test Ban Monitoring
Publisher: National Academies Press
ISBN: 0309590795
Category : Technology & Engineering
Languages : en
Pages : 133
Get Book Here
Book Description
On September 24, 1996, President Clinton signed the Comprehensive Nuclear Test Ban Treaty at the United Nations Headquarters. Over the next five months, 141 nations, including the four other nuclear weapon states -- Russia, China, France, and the United Kingdom -- added their signatures to this total ban on nuclear explosions. To help achieve verification of compliance with its provisions, the treaty specifies an extensive International Monitoring System of seismic, hydroacoustic, infrasonic, and radionuclide sensors. This volume identifies specific research activities that will be needed if the United States is to effectively monitor compliance with the treaty provisions.
Author: Dimitris G Assimakopoulos
Publisher: Springer Science & Business Media
ISBN: 1461402484
Category : Science
Languages : en
Pages : 346
Get Book Here
Book Description
New Product Development (NPD) is about the ideation, formulation, and implementation of new and superior solutions in the market. Beyond the obvious need for organizations to innovate in order to compete, embedded in any NPD program are knowledge, technological expertise, and the social networks that convert these capabilities into offerings that create value at every level—for customers, industries, communities, and regions. This volume provides an array of knowledge perspective in NPD across multiple levels of analysis and geographic regions, including Europe, the United States, China, Japan, and India, to explore the dynamics of NPD in today’s global environment. Presenting case studies from such industries as ICT services, semiconductors, software development, bio-technology, higher education, and even safety for children’s toys, and drawing from a variety of theoretical perspectives, including technology and knowledge management, sociology, economic geography, and organizational behavior, the authors highlight critical success and failure factors in NPD. Among the topics covered: New product development teams, including multi-functional and multi-site teams De-localization and off-shoring of tasks and processes Individual competencies and organizational capabilities University-industry interactions, high-tech clusters, and technology transfer Technology policy
