نتایج جستجو برای: geophysical

تعداد نتایج: 10010  

2005
G. Colangelo V. Lapenna L. Telesca

Since 2000 the Institute of Methodologies for the Environmental Analysis (National Council of Research, Tito, Italy) installed a geophysical monitoring network able to detect geoelectric, geochemic and seismometric parameters in seismic areas of southern Italy. During this period a very large data-base of geophysical time series has been organized and it is actually available to assess robust s...

2004
W. E. Doll L. P. Beard T. J. Gamey

Airborne geophysical systems have been in use since 1943 (Hildenbrand et al., 1990). These systems used airborne magnetometers for submarine detection and geophysical mapping. Airborne electromagnetic systems were introduced in the 1950s (Barringer et al., 1990) for mineral exploration. These early magnetic and electromagnetic systems were mounted on fixed wing aircraft. In the 1960s helicopter...

2010

As earth scientists seek to address today’s demands to detect, characterize and discriminate buried Unexploded Ordnance (UXO) for remediation and safe disposal, they are increasingly relying on high resolution geophysical methods to provide accurate and efficient detection of land-based and offshore targets. In comparison with traditional sampling procedures, geophysical methods are especially ...

2017
Chandra Mouli Pavuluri Kimitaka Kawamura T. Swaminathan Eri Tachibana

Title Stable carbon isotopic compositions of total carbon, dicarboxylic acids and glyoxylic acid in the tropical Indian aerosols : Implications for sources and photochemical processing of organic aerosols Author(s) Pavuluri, Chandra Mouli; Kawamura, Kimitaka; Swaminathan, T.; Tachibana, Eri Citation Journal of Geophysical Research, Atmospheres, 116: D18307 Issue Date 2011-09-29 Doc URL http://h...

2006
Xiang Li Rahul Ramachandran Sara Graves Sunil Movva

Geophysical phenomena are observable events with spatiotemporal characteristics. These phenomena can have spatial extent and shape but the intensities are generally not homogeneous within this spatial extent. These phenomena also evolve, grow and perish over time. Therefore, developing a robust detection algorithm for geophysical phenomena is difficult and challenging. This paper presents a hyb...

2018
Ritu Raj Nath Gautam Kumar M. L. Sharma S. C. Gupta

It has now been well established that the depth of bedrock is a key parameter in assessing the impact of local site conditions on seismic hazard analysis. Where conventional geotechnical testing like standard penetration test (SPT) or cone penetration test (CPT) requires a far greater cost and manpower to be used for such purposes, geophysical testing like ground-penetrating radar (GPR) and mul...

Journal: :Journal of the Visualization Society of Japan 1994

2006
Stefan Finsterle Michael B. Kowalsky

Reliable prediction of subsurface flow and contaminant transport depends on the accuracy with which the values and spatial distribution of process-relevant model parameters can be identified. Successful characterization methods for complex soil systems are based on (1) an adequate parameterization of the subsurface, capable of capturing both random and structured aspects of the heterogeneous sy...

2005
Frederick D. Day-Lewis Kamini Singha Andrew M. Binley

[1] Geophysical imaging has traditionally provided qualitative information about geologic structure; however, there is increasing interest in using petrophysical models to convert tomograms to quantitative estimates of hydrogeologic, mechanical, or geochemical parameters of interest (e.g., permeability, porosity, water content, and salinity). Unfortunately, petrophysical estimation based on tom...

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