scholarly journals Seeking the Finer Light

1999 ◽  
Vol 121 (05) ◽  
pp. 50-53 ◽  
Author(s):  
Michael Valenti
Keyword(s):  
Process Management ◽  
Bulk Material ◽  
Three Dimensional ◽  
Complex Structures ◽  
Laser Measurement ◽  
Construction Sites ◽  
Three Dimensional Measurement ◽  
Laser Systems ◽  
Corn Processing ◽  
And Control

Manufacturers, engineers, architects, and researchers are using the precision, speed, and noncontact processes and achieve more control. Riegl Laser Systems of Horn, Austria, designed its 3-D LMS-Z210 imaging scanner to generate 240,000 laser measurement points within 30 seconds to create highly accurate images of complex structures without the need for conventional surveying. The National Institute of Standards and Technology in Gaithersburg, Maryland, is designing a laser-based system to track the myriad of tools, materials, and equipment on construction sites. Riegl Laser Measurement designed its LMS-Z210 3-D Imaging Scanner to serve in three-dimensional measurement applications that are too complex for traditional theodolites to survey, including shipyards, quarries, vineyards, and crime scenes. Riegl USA expects to begin several projects using the 3-D scanner to continuously monitor bulk material piles in the wood and corn processing industries to improve process management and control.

scholarly journals The torsional alignment changed significantly in growing rabbits after patella dislocation by a three-dimensional measurement

2020 ◽  
Author(s):  
Jinghui Niu ◽  
Qi Qi ◽  
Kang Piao ◽  
Kuo Hao ◽  
Fei Wang
Keyword(s):  
Three Dimensional ◽  
Patella Dislocation ◽  
Control Group ◽  
Lateral Dislocation ◽  
Post Surgery ◽  
Femoral Version ◽  
Three Dimensional Measurement ◽  
Torsional Malalignment ◽  
And Control ◽  
Experimental Group

Abstract Background: Torsional malalignment has been considered as a risk factor for patella dislocation. But the influence of patella dislocation for torsional alignment development remains unknown. The present study aims to investigate whether the torsion alteration of the hindlimb occur after patella dislocation in growing rabbits. Methods: In the present study, 30 one-month old rabbits were included. The experimental group consists of 30 left knees of rabbits and were underwent patella lateral dislocation. And the control group consists of 30 right knees and no surgical procedure was performed. A CT scan was performed on each knee when the surgery was finished and at the time the rabbits were skeletal mature (5 months post-surgery). The angles of femoral version and tibial torsion were measured using a three-dimensional method and analyzed between the experimental group and control group. Results: The femoral version and tibia torsion in the experimental and control group immediately after surgery were not different significantly. However, 5 months after surgery, the femoral version angle of the experimental group (-5.50±6.13°) was significantly different with that of the experimental group (-10.90±4.74°)(P < 0.05). But the tibia torsion angle in the experimental group (7.17±7.25°) and control group (4.47±6.34°) were not significantly different (P = 0.144). Conclusion: From this study, patella dislocation can lead to alteration of femoral version in growing rabbits. This may indicate the early treatment for patella dislocation in children is particularly important to avoid torsional malalignment in the future. These findings may develop pathology and etiology of patella dislocation.

scholarly journals Self-rotating 3D chiral mechanical metamaterials

2021 ◽  
Vol 477 (2251) ◽  
pp. 20200825
Author(s):  
K. K. Dudek ◽  
A. Drzewiński ◽  
M. Kadic
Keyword(s):  
Rotational Motion ◽  
Attitude Control ◽  
Structural Unit ◽  
Three Dimensional ◽  
Point Of View ◽  
Complex Structures ◽  
Structural Elements ◽  
Mechanical Metamaterials ◽  
Potential Applications ◽  
And Control

In this work, we demonstrate that three-dimensional chiral mechanical metamaterials are able to self-twist and control their global rotation. We also discuss the possibility of adjusting the extent of the global rotation manifested by the system in a programmable manner. In addition, we show that the effect of the global rotation can be observed both for small systems composed of a single structural unit as well as more complex structures incorporating several structural elements connected to each other. Finally, it is discussed that the results presented in this work are very promising from the point of view of potential applications such as satellites or telescopes in space, where appropriately designed mechanical metamaterials could be used for the attitude control as well as other systems where the control of the rotational motion is required.

THREE-DIMENSIONAL MEASUREMENT OF COLUMNAR JOINTING IN THE BISHOP TUFF, OWENS RIVER GORGE, CALIFORNIA

2017 ◽  
Author(s):  
Antonio M. Bird ◽  
◽  
Katherine A. Kelker ◽  
Elizabeth S. Brogden ◽  
Jeff Glazner ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bishop Tuff ◽  
Columnar Jointing ◽  
Dimensional Measurement ◽  
Three Dimensional Measurement

scholarly journals The first observation of 4D tomography measurement of plasma structures and fluctuations

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chanho Moon ◽  
Kotaro Yamasaki ◽  
Yoshihiko Nagashima ◽  
Shigeru Inagaki ◽  
Takeshi Ido ◽  
...  
Keyword(s):  
Steady State ◽  
Three Dimensional ◽  
Axial Direction ◽  
Axial Position ◽  
Entire Cross Section ◽  
Helicon Plasma ◽  
Emission Profile ◽  
Dimensional Measurement ◽  
Tomography System ◽  
Three Dimensional Measurement

AbstractA tomography system is installed as one of the diagnostics of new age to examine the three-dimensional characteristics of structure and dynamics including fluctuations of a linear magnetized helicon plasma. The system is composed of three sets of tomography components located at different axial positions. Each tomography component can measure the two-dimensional emission profile over the entire cross-section of plasma at different axial positions in a sufficient temporal scale to detect the fluctuations. The four-dimensional measurement including time and space successfully obtains the following three results that have never been found without three-dimensional measurement: (1) in the production phase, the plasma front propagates from the antenna toward the end plate with an ion acoustic velocity. (2) In the steady state, the plasma emission profile is inhomogeneous, and decreases along the axial direction in the presence of the azimuthal asymmetry. Furthermore, (3) in the steady state, the fluctuations should originate from a particular axial position located downward from the helicon antenna.

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