Rolleiflex 2.8 xen
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It is concluded that the photogrammetric technique should prove valuable in the in vivo assessment of the performance of restorative materials but that further refinement of the method is required particularly with regard to the orientation of replicas for sequential measurements.Īn in vitro comparison of photogrammetric and conventional complete-arch implant impression techniques.īergin, Junping Ma Rubenstein, Jeffrey E Mancl, Lloyd Brudvik, James S Raigrodski, Ariel JĬonventional impression techniques for recording the location and orientation of implant-supported, complete-arch prostheses are time consuming and prone to error. The photogrammetric technique highlighted differences in performance not detected by the modified USPHS criteria. The performance of Class II restorations of Dispersalloy was compared with that of similar restorations of either KetacFil or Occlusin. This paper describes monitoring the wear of restorations borne by partial dentures over a 12 months period using a novel photogrammetric technique and modified United States Public Health Service (USPHS) criteria.
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from AuthorsĬomparison of a novel photogrammetric technique and modified USPHS criteria to monitor the wear of restorations.Ĭhadwick, R G McCabe, J F Walls, A W Mitchell, H L Storer, R This method is more accurate and significantly more rapid than conventional trench-mapping methods, and the analytical plotter is capable of producing cartographic definition of high resolution when detailed trench maps are necessary. Small-scale structural, lithologic, and stratigraphic features can be rapidly mapped by the photogrammetric method. It is useful mainly for aerospace engineers who want to use photogrammetric techniques, but it also gives a general introduction for photogrammetrists and computer vision scientists to new applications.Ī close-range photogrammetric technique for mapping neotectonic features in trenchesĬlose-range photogrammetric techniques and newly available computerized plotting equipment were used to map exploratory trench walls that expose Quaternary faults in the vicinity of Yucca Mountain, Nevada. This review provides a comprehensive and systematic summary of photogrammetric techniques for aerospace applications based on diverse sources. Although the general principles of photogrammetry are well known particularly in topographic and aerial survey, photogrammetric techniques require special adaptation for aerospace applications. The distinct advantage of photogrammetric measurement is that it is a non-contact, global measurement technique. Photogrammetric techniques have been used for measuring the important physical quantities in both ground and flight testing including aeroelastic deformation, attitude, position, shape and dynamics of objects such as wind tunnel models, flight vehicles, rotating blades and large space structures. Photogrammetric techniques for aerospace applications