Results 21 to 30 of about 935,449 (339)
BMC Oral Health, 2023 Background Three-dimensional (3D) printing is a novel innovation in the field of craniomaxillofacial surgery, however, a lack of evidence exists related to the comparison of the trueness of skull models fabricated using different technology-based ...
Xiaotong Wang +4 more
doaj +1 more source
Measurement of retinal vessel widths from fundus images based on 2-D modeling [PDF]
, 2002 Changes in retinal vessel diameter are an important sign of diseases such as hypertension, arteriosclerosis and diabetes mellitus. Obtaining precise measurements of vascular widths is a critical and demanding process in automated retinal image analysis ...
Basu, A. +5 more
core +1 more source
3D angle-of-arrival positioning using von Mises-Fisher distribution [PDF]
, 2017 We propose modeling an angle-of-arrival (AOA) positioning measurement as a von Mises-Fisher (VMF) distributed unit vector instead of the conventional normally distributed azimuth and elevation measurements.
Ali-Löytty, Simo +3 more
core +2 more sources
THREE-DIMENSIONAL MEASUREMENT METHOD OF FLATNESS OF LARGE DEPLOYABLE FLAT SAR [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023 In order to improve the detection and surveillance capability of space-based SAR, large-size spaceborne SAR antenna is needed, and the scale will reach the order of 100 meters.
H. Shi
doaj +1 more source
The Ray Tracing Analytical Solution within the RAMOD framework. The case of a Gaia-like observer [PDF]
, 2015 This paper presents the analytical solution of the inverse ray tracing problem for photons emitted by a star and collected by an observer located in the gravitational field of the Solar System.
Crosta, Mariateresa +3 more
core +2 more sources
Anthropometric accuracy of three-dimensional average faces compared to conventional facial measurements [PDF]
Scientific Reports, 2021 AbstractThis study aimed to evaluate and compare the accuracy of average faces constructed by different methods. Original three-dimensional facial images of 26 adults in Chinese ethnicity were imported into Di3DView and MorphAnalyser for image processing.
Zhiyi Shan +8 more
openaire +3 more sources
A newly conceived cylinder measuring machine and methods that eliminate the spindle errors [PDF]
, 2012 Advanced manufacturing processes require improving dimensional metrology applications to reach a nanometric accuracy level. Such measurements may be carried out using conventional highly accurate roundness measuring machines.
DAMAK, Mohamed +4 more
core +5 more sources
Accuracy of Digital Impression Taking Using Intraoral Scanner Versus the Conventional Technique
Frontiers in Dentistry, 2021 Objectives: Intraoral scanners have shown promising results when used as an adjunct or alternative to conventional impression techniques. This study compared the accuracy of digital impression taking using an intraoral scanner versus the conventional ...
Arash Zarbakhsh +4 more
doaj +1 more source
A microscopy approach for in situ inspection of the μCMM stylus for contamination [PDF]
, 2017 During the µCMM measurement process, contamination gradually builds up on the surface of the stylus tip and affects dimensional accuracy of the measurement.
Feng, Xiaobing +2 more
core +2 more sources
3D Printing in Medicine, 2021 Background Material extrusion is used to 3D print anatomic models and guides. Sterilization is required if a 3D printed part touches the patient during an intervention. Vaporized Hydrogen Peroxide (VHP) is one method of sterilization.
Mauricio Toro +3 more
doaj +1 more source