Space systems. Relative motion analysis elements after LV/SC separation

2015 ◽  
Keyword(s):  
Motion Analysis ◽  
Relative Motion ◽  
Space Systems

Multi-object tracking via tracklet confidence-aided relative motion analysis

2017 ◽  
Vol 26 (05) ◽  
pp. 1 ◽  
Author(s):  
Han-Mu Park ◽  
Se-Hoon Park ◽  
Kuk-Jin Yoon
Keyword(s):  
Object Tracking ◽  
Motion Analysis ◽  
Relative Motion

scholarly journals A CASE STUDY ON HOW DISTANT TREES APPEAR TO BE MOVING IN THE SAME DIRECTION AS OUR RIDE

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Omkar Devidas Kadam
Keyword(s):  
Motion Analysis ◽  
Relative Motion ◽  
The Road ◽  
Common Observation ◽  
Direction Opposite

It is of common observation that, when we ride on a bus, train, or vehicle, the trees alongside seem to travel in the direction opposite to ours. This is on account of the relative motion between us and the trees. Interestingly, it is the motion of the trees that are far away from the road that appears strange. The trees that are far away when observed in the presence of other objects in the foreground almost give the illusion that they are moving along with us in the same direction of the ride. Realizing that not many people are aware of this illusion and hardly there is any illustration to explain it, in what follows, I discussed how this perception could be explained with the help of basic geometry and motion analysis. We refer to this illusion as ‘false relative motion’.

scholarly journals Periodic organization of the contractile apparatus in smooth muscle revealed by the motion of dense bodies in single cells.

1989 ◽  
Vol 108 (4) ◽  
pp. 1465-1475 ◽  
Author(s):  
G J Kargacin ◽  
P H Cooke ◽  
S B Abramson ◽  
F S Fay
Keyword(s):  
Smooth Muscle ◽  
Motion Analysis ◽  
Relative Motion ◽  
Single Cells ◽  
Cell Types ◽  
Fixed Time ◽  
Contractile Apparatus ◽  
Isolated Cells ◽  
Cell Axis ◽  
Dense Bodies

To study the organization of the contractile apparatus in smooth muscle and its behavior during shortening, the movement of dense bodies in contracting saponin skinned, isolated cells was analyzed from digital images collected at fixed time intervals. These cells were optically lucent so that punctate structures, identified immunocytochemically as dense bodies, were visible in them with the phase contrast microscope. Methods were adapted and developed to track the bodies and to study their relative motion. Analysis of their tracks or trajectories indicated that the bodies did not move passively as cells shortened and that nearby bodies often had similar patterns of motion. Analysis of the relative motion of the bodies indicated that some bodies were structurally linked to one another or constrained so that the distance between them remained relatively constant during contraction. Such bodies tended to fall into laterally oriented, semirigid groups found at approximately 6-microns intervals along the cell axis. Other dense bodies moved rapidly toward one another axially during contraction. Such bodies were often members of separate semirigid groups. This suggests that the semirigid groups of dense bodies in smooth muscle cells may provide a framework for the attachment of the contractile structures to the cytoskeleton and the cell surface and indicates that smooth muscle may be more well-ordered than previously thought. The methods described here for the analysis of the motion of intracellular structures should be directly applicable to the study of motion in other cell types.

The restoration of blurred electron micrographs

1986 ◽  
Vol 44 ◽  
pp. 180-181
Author(s):  
Bridget Carragher ◽  
David A. Bluemke ◽  
Michael J. Potel ◽  
Robert Josephs
Keyword(s):  
Cross Section ◽  
Electron Micrographs ◽  
Relative Motion ◽  
Finite Thickness ◽  
Image Plane ◽  
Helical Axis ◽  
Thin Sections ◽  
Structural Details

We have investigated the feasibility of restoring blurred electron micrographs. Two related problems have been considered; the restoration of images blurred as a result of relative motion between the specimen and the image plane, and the restoration of images which are rotationally blurred about an axis. Micrographs taken while the specimen is drifting result in images which are blurred in the direction of motion. An example of rotational blurring arises in micrographs of thin sections of helical particles viewed in cross section. The twist of the particle within the finite thickness of the section causes the image to appear rotationally blurred about the helical axis. As a result, structural details, particularly at large distances from the helical axis, will be obscured.

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