Results 251 to 260 of about 2,619,148 (295)
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CT scanning: patterns of use and dose
Journal of Radiological Protection, 2000CT scanning is a relatively high-dose procedure. In spite of the use of magnetic resonance imaging, with faster CT scanners and helical techniques CT is becoming more common. There are few data from practice in the United States regarding the age and sex distribution of patients receiving CT scans, what type of scan and how many scans they receive, or ...
F A, Mettler +3 more
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Reusing Scan Chains for Test Pattern Decompression
Journal of Electronic Testing, 2002The paper presents a method for testing a system-on-a-chip by using a compressed representation of the patterns on an external tester: The patterns for a certain core under test are decompressed by reusing scan chains of cores idle during that time. The method only requires a few additional gates in the wrapper; while the mission logic is untouched ...
Dorsch, Rainer, Wunderlich, Hans-Joachim
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Minimum-scan pattern recognition
IEEE Transactions on Information Theory, 1959Speedier and simpler pattern-recognition systems can be realized when provided with a minimum-scan reading device. For the idealized case, where the input set of patterns is finite, binary and errorless, a theorem is proved which enables the designer to predict the efficiency range of the contemplated reading device. A constructive method, which can be
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Scan pattern optimization for uniform proton beam scanning
Medical Physics, 2009Magnetic beam scanning allows one to spread proton beam over the desired radiation field area, improving beam utilization and conformity to the target area. This article discusses generic scan forms for generating uniform circular and rectangular fields and establishes criteria that can be applied to optimize selected scan patterns. During construction
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Vigilance and scanning patterns in birds
Animal Behaviour, 1984We present a new approach to the analysis of scanning patterns in feeding birds. We estimate the probability of a bird detecting a predator from the frequency distribution of inter-scan intervals and the proportion of time spent scanning. This method avoids, several unrealistic assumptions implied in earlier analyses of vigilance data, and can ...
Andrew Hart, Dennis William Lendrem
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Lissajous-like scan pattern for a gimballed LIDAR
2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, 2014In this paper the use of Lissajous-like scan trajectories is studied for a gimballed LIDAR system. In these systems a planar LIDAR sensor is attached to a gimbal, allowing for the collection of 3D range information. Typical gimballed LIDAR systems use raster scan patterns, where the LIDAR is slowly rotated and each line of LIDAR data is collected in ...
J. Wesley Anderson, Garrett M. Clayton
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Application of Scanning Probe Lithography to Graphite Patterning
Journal of Nanoscience and Nanotechnology, 2011We applied the scanning probe lithographic technique to a graphite patterning in air and analyzed the patterned sample with the lateral force microscopy and Raman spectroscopy. The local electric field generated from a tip caused either etching or oxidization depending on the electric field intensity in air.
Hyeondeuk, Yong +4 more
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Suppression of moiré patterns in scanned halftone images
Signal Processing, 1998zbMATH Open Web Interface contents unavailable due to conflicting licenses.
James Ching-Yu Yang, Wen-Hsiang Tsai
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Adaptive Diagnostic Pattern Generation for Scan Chains
4th IEEE International Symposium on Electronic Design, Test and Applications (delta 2008), 2008Scan is a widely used design-for-testability technique to improve test and diagnosis quality, however, scan chain failures account for almost 50% of chip failures. In this paper, a SAT-based technique is proposed to adaptively generate patterns to diagnose stuck-at faults in scan chains. Experimental results on ISCAS'89 benchmark circuits show that the
Fei Wang, Yu Hu 0001, Xiaowei Li 0001
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Effect of scanning speed, scanning pattern, and tip size on the accuracy of intraoral digital scans
The Journal of Prosthetic DentistryCurrently available intraoral scanning technology makes intraoral scanning quicker and allows the use of smaller scanner tips. However, studies on the influence of scanning speed, tip size, and scanning patterns on scanning accuracy are lacking.The purpose of this in vitro study was to evaluate the effect of scanning speed, scanning pattern, and ...
Hongseok An +2 more
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