RESUMO
The Cassini spacecraft orbiting Saturn carries the composite infrared spectrometer (CIRS) designed to study thermal emission from Saturn and its rings and moons. CIRS, a Fourier transform spectrometer, is an indispensable part of the payload providing unique measurements and important synergies with the other instruments. It takes full advantage of Cassini's 13-year-long mission and surpasses the capabilities of previous spectrometers on Voyager 1 and 2. The instrument, consisting of two interferometers sharing a telescope and a scan mechanism, covers over a factor of 100 in wavelength in the mid and far infrared. It is used to study temperature, composition, structure, and dynamics of the atmospheres of Jupiter, Saturn, and Titan, the rings of Saturn, and surfaces of the icy moons. CIRS has returned a large volume of scientific results, the culmination of over 30 years of instrument development, operation, data calibration, and analysis. As Cassini and CIRS reach the end of their mission in 2017, we expect that archived spectra will be used by scientists for many years to come.
RESUMO
This publisher's note renumbers the reference list in Appl. Opt.56, 5274 (2017)APOPAI0003-693510.1364/AO.56.005274.
RESUMO
Subperiosteal implants have been providing a treatment modality for the edentulous and partially edentulous patient for over 35 years. A recent innovation in subperiosteal dental implant materials technology is the use of hydroxylapatite (HA) coating as a surface coating on the implanted metal framework. The purpose of this study was to compare the intermediate-term soft-tissue performance of HA-coated subperiosteal dental implants with that of uncoated subperiosteal dental implants at equivalent time periods. Four choices of each implant variety were followed for approximately six years. At five years, one patient died, so one HA-coated implant was lost to further follow-up. One uncoated subperiosteal needed to be removed at four years, due to unremitting dehiscence around the post area. The remaining implants were followed, and results indicate that the early healing sequelae appear to be hastened and that the intermediate-term status is non-problematic for all implants. Hard-tissue reactions are not necessarily apparent by direct observation. The HA-coated implants were associated with a kinder soft-tissue response, typified by a tighter, healthier soft-tissue seal around the perigingival abutment posts and no post-implantation strut dehiscence complications. HA coating appears to represent an incremental increase in performance of uncoated metallic subperiosteal dental implants, for soft-tissue as well as hard-tissue response.