I. M. Watson

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  • Cisco Systems, Informational J Peterson Neustar, Inc M Watson
  • 2002
Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document describes private extensions to the Session Initiation Protocol (SIP) that enable a network of trusted SIP servers to assert the identity of authenticated users,(More)
[1] In this study, ultraviolet TOMS (Total Ozone Mapping Spectrometer) satellite data for SO 2 are re-evaluated for the first 15 days following the 15 June 1991 Pinatubo eruption to reflect new data retrieval and reduction methods. Infrared satellite SO 2 data from the TOVS/HIRS/2 (TIROS (Television Infrared Observation Satellite) Optical Vertical(More)
Much recent research on acoustic cues for consonants' places of articulation has focused upon the nature of the rapid spectral changes that take place between signal portions corresponding to consonantal closure and adjacent vowels. The study reported here builds on the foundation laid by earlier studies that have explored techniques for representing(More)
The volcanological community has a powerful new tool in the spaceborne moderate resolution imaging spectroradiometer (MODIS), which, from its synoptic perspective, provides satellite imagery of every volcano on Earth every 2 days. MODIS has the spectral characteristics to be able to utilise previously developed retrievals that quantify volcanic ash, ice,(More)
Ground-based and aircraft correlation spectrometer (COSPEC) measurements at the principal active volcanoes in Guatemala were carried out at intervals during the period 1999–2002, as part of an attempt to measure baseline SO 2 emissions of potentially dangerous volcanoes and to better understand their eruption mechanisms. We discuss some of the uncertainties(More)
The enhancement of light extraction efficiency for thin-film flip-chip (TFFC) InGaN quantum wells (QWs) light-emitting diodes (LEDs) with GaN micro-domes on n-GaN layer was studied. The light extraction efficiency of TFFC InGaN QWs LEDs with GaN micro-domes were calculated and compared to that of the conventional TFFC InGaN QWs LEDs with flat surface. The(More)
In this work the structure of (1100)M-plane GaN epitaxially grown on γ-LiAlO 2 (100) by using plasma-assisted molecular beam epitaxy (PAMBE) is studied. The heteroepitaxial alignment and the microstruc-ture of M-plane GaN as well as the defect formation in the layer are systematically investigated by using transmission electron microscopy (TEM). GaN is well(More)
[1] The February 2001 eruption of Cleveland Volcano, Alaska allowed for comparisons of volcanic ash detection using two-band thermal infrared (10 – 12 mm) remote sensing from MODIS, AVHRR, and GOES 10. Results show that high latitude GOES volcanic cloud sensing the range of about 50 to 65°N is significantly enhanced. For the Cleveland volcanic clouds the(More)
During December 2000 and January 2001, an increase in activity at Popocatépetl volcano, Mexico, was observed in both ground-based correlation spectrometer (COSPEC) data and in imagery from various satellite sensors, including the Moderate Resolution Imaging Spectroradiometer (MODIS), Total Ozone Mapping Spectrometer (TOMS), Advanced Very High Resolution(More)