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The new technique of x-ray microtomography nondestructively generates three-dimensional maps of the x-ray attenuation coefficient inside small samples with approximately 1 percent accuracy and with resolution approaching 1 micrometer. Spatially resolved elemental maps can be produced with synchrotron x-ray sources by scanning samples at energies just above(More)
This document does not express any regulatory policies of the United States or any of its agencies, or provide recommendations for regulatory action. Further information on the process for preparing Synthesis and Assessment products and the CCSP itself can be found at www.climatescience.gov. Eight members of the Climate Change Science Progam Product(More)
The most important energy development of the past decade has been the wide deployment of hydraulic fracturing technologies that enable the production of previously uneconomic shale gas resources in North America. If these advanced gas production technologies were to be deployed globally, the energy market could see a large influx of economically competitive(More)
Introduction This paper on pilonidal lesions is presented with the object of reviewing the disease and describing a method of treatment introduced by Jacobsen (1959). A pilonidal sinus is an anomalous condition, in which there may be found a nidus of epithelial and hair cells submerged in the cutaneous tissues of the intergluteal cleft. These elements under(More)
This document does not express any regulatory policies of the United States or any of its agencies, or provide recommendations for regulatory action. Further information on the process for preparing Synthesis and Assessment products and the CCSP itself can be found at www.climatescience.gov. Eight members of the Climate Change Science Program Product(More)