Analyzing Intrinsic Motion Textures Created from Naturalistic Video Captures

The creation of man, especially the stages of his development in the fetus, is one of the complex issues and wonders of creation in the world. Before Islam and even years later, various views were expressed about how the fetus was originated. Based on the science of embryology, it has been proven that both man and woman are involved in the formation of the fetus. It is claimed that the phrase "a leaping drop" in the verse "He is created from a leaping drop" means a jumping water and refers to the sperm of man. Therefor the female sperm has not mentioned in fetus formation. In response, it can be said: Contrary to popular belief, one of the meanings of the phrase is "fast and moving fluid" and the word "dāfiq" (i.e. leaping) as a subject refers to the intrinsic motion of human creation material and it is considered as one of the secrets of the Qur'an. In other verses of the Holy Qur'an, the creation of man from the "a mingled sperm" is also specified, which refers to the mixing of the sperm of man and woman.

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Jet, Wake and Intrinsic Motion in Impellers of Centrifugal Compressors

Volume 1: Turbomachinery ◽

10.1115/96-gt-261 ◽

1996 ◽

Cited By ~ 3

Author(s):

Y. N. Chen ◽

U. Seidel ◽

U. Haupt ◽

M. Rautenberg

Keyword(s):

Reverse Flow ◽

Vortex Pair ◽

Leading Edge ◽

Rotating Stall ◽

Secondary Flows ◽

Low Flow ◽

Experimental Result ◽

Vaned Diffuser ◽

Measured Velocity ◽

Intrinsic Motion

It was shown in a previous paper of the authors (1991) that jet and wake in the flow of the impeller of the centrifugal compressor are developed from the Dean’s type vortex pair formed in the curvature of the blade channel. The jet rotating against the sense of the impeller is weakened, and the wake rotating in the sense of the impeller is enhanced during travelling with the flow toward the outlet. This property is attributed to the conservation of the potential vorticity of the vortex. The experimental result obtained by Krain (1984) has confirmed this theory. The secondary flows found by Farge and Johnson (1990) enable the determination of the vorticity of the wake at the outlet of the impeller. It amounts to 6.9 Ω and 5.8 Ω for the radial-blading and the 60°-backswept blading impeller, respectively. The intensity of the vortex jet is weakened to undetectable value for both the impellers. The patterns of these secondary flow fields are also quite different between these two kinds of impellers. Whilst that of the former is controlled by the intrinsic motion, that of the latter is governed by the relative velocity along the blades. Furthermore, the experimental result obtained by the injection of colored dye at the impeller outlet and the measured velocity field around the impeller reveal an intense reverse flow in the radial blading impeller, travelling from the outlet toward the inlet, along the shroud. It can be shown that this reverse flow is caused by the intrinsic motion occuring in this impeller and impinging on the leading edge of the diffuser vane. As the rotating stall is introduced by the reverse flow, the low-solidity vaned diffuser, and still better the vaneless diffuser can therefore shift the stall line to a very low flow rate.

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Revealing hidden variability in PWNe with spectral index maps

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa2364 ◽

2020 ◽

Vol 498 (1) ◽

pp. 821-834

Author(s):

Benson T Guest ◽

Samar Safi-Harb

Keyword(s):

Spectral Index ◽

Rotational Energy ◽

Line Of Sight ◽

Pulsar Wind Nebulae ◽

X Ray ◽

Analysis Technique ◽

Intrinsic Motion ◽

Pulsar Wind ◽

Map Analysis ◽

Index Maps

ABSTRACT Pulsar wind nebulae (PWNe) are the synchrotron bubbles inflated by the rotational energy of a neutron star. Observing variability within them has previously been limited to cases of significant brightening, or the few instances where transient features are interpreted in terms of intrinsic motion or associated with variability from the pulsar. Jet and torus morphology are also only visible in cases of differing brightness with respect to the surrounding nebula and favourable alignment with our line of sight. Spectral map analysis involves binning observations with an adaptive algorithm to meet a signal limit and colouring the results based on the desired model parameter fits. Minute changes in spectral index become therefore apparent even in cases where brightness images alone do not suggest any underlying changes. We present a Chandra X-ray study of the PWNe in G21.5–0.9, Kes 75, G54.1+0.3, G11.2–0.3, and 3C 58, using archival observations accumulated over the ∼20-yr lifetime of the mission. With the spectral map analysis technique, we discover evidence for previously unknown variability opening a new window into viewing PWNe.

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Radial Transport Along the Human Acinar Tree

Journal of Biomechanical Engineering ◽

10.1115/1.4002371 ◽

2010 ◽

Vol 132 (10) ◽

Cited By ~ 10

Author(s):

F. S. Henry ◽

A. Tsuda

Keyword(s):

Numerical Model ◽

Entrance Region ◽

Submicron Particles ◽

Chaotic Mixing ◽

Lateral Transport ◽

Radial Transport ◽

Intrinsic Motion

A numerical model of an expanding asymmetric alveolated duct was developed and used to investigate lateral transport between the central acinar channel and the surrounding alveoli along the acinar tree. Our results indicate that some degree of recirculation occurs in all but the terminal generations. We found that the rate of diffusional transport of axial momentum from the duct to the alveolus was by far the largest contributor to the resulting momentum in the alveolar flow but that the magnitude of the axial momentum is critical in determining the nature of the flow in the alveolus. Further, we found that alveolar flow rotation, and by implication chaotic mixing, is strongest in the entrance generations. We also found that the expanding alveolus provides a pathway by which particles with little intrinsic motion can enter the alveoli. Thus, our results offer a possible explanation for why submicron particles deposit preferentially in the acinar-entrance region.

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