Mechatronic cine-film copying using transputer control

Living human blood platelets (P) have been examined with a high extinction differential interference contrast (DIC) microscope capable of detecting structures as small as 20 nm in diameter. During the quarter hour required for complete transformation, the entire shape change sequence is clearly visible, including disk to sphere transformation, extension and retraction of pseudopodia, and spreading and ruffling of the hyalomere. The exocytosis of intact 5-hydroxy tryptamine (serotonin)-containing dense bodies has been observed both by DIC microscopy and by epifluorescence microscopy in P stained with mepacrine. The release of dense bodies is associated with the formation of one or more “craters” in the upper surface of the granulomere. With optical sectioning, it is evident that certain “craters” represent internal chambers of the open canalicular system. Using these techniques, abnormalities in P motility have been observed in hereditary P disorders. In summary, the ability to observe and record permanently on cine film the motility of living P provides a rapid test of P function which allows quantitation of normal vs. abnormal motile behavior.

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Assessing coronary stenosis. Quantitative coronary angiography versus visual estimation from cine-film or pharmacological stress perfusion images

European Heart Journal ◽

10.1093/oxfordjournals.eurheartj.a015033 ◽

1996 ◽

Vol 17 (8) ◽

pp. 1167-1174 ◽

Cited By ~ 23

Author(s):

M. Gottsauner-Wolf ◽

H. Sochor ◽

D. Moertl ◽

M. Gwechenberger ◽

F. Stochenhuber ◽

...

Keyword(s):

Coronary Angiography ◽

Coronary Stenosis ◽

Quantitative Coronary Angiography ◽

Stress Perfusion ◽

Visual Estimation ◽

Pharmacological Stress ◽

Cine Film

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Computer analysis of a high-speed film of the plane turbulent mixing layer

Journal of Fluid Mechanics ◽

10.1017/s0022112082001372 ◽

1982 ◽

Vol 119 ◽

pp. 323-345 ◽

Cited By ~ 80

Author(s):

Miguel A. Hernan ◽

Javier Jimenez

Keyword(s):

Turbulent Mixing ◽

High Speed ◽

Digital Image Analysis ◽

Mixing Layer ◽

Quantitative Information ◽

Large Structure ◽

Turbulent Mixing Layer ◽

High Speed Film ◽

History Of ◽

Cine Film

To evaluate the usefulness of digital image analysis in extracting quantitative information from flow pictures we have studied a 16 mm ciné film of a turbulent mixing layer. A sequence of 373 frames is digitized and analysed to isolate and measure the concentration eddies that constitute the large structure and to follow their individual evolution in time. As a result, statistics are given on the life history of the eddies, the structure of the amalgamation process and the amount of entrainment, as measured by area change, due to amalgamation as compared to the total. It is found that most of the entrainment occurs during the normal life of eddies and not during pairing. Mixing intermittency is computed from the observed shape of the eddies and seen to compare well with previous measurements. The significance of these results in modelling the mixing layer is discussed briefly and some comments are given on the general usefulness of the techniques presented.

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Reflection of a high-amplitude solitary wave at a vertical wall

Journal of Fluid Mechanics ◽

10.1017/s002211209700551x ◽

1997 ◽

Vol 342 ◽

pp. 141-158 ◽

Cited By ~ 61

Author(s):

M. J. COOKER ◽

P. D. WEIDMAN ◽

D. S. BALE

Keyword(s):

Solitary Wave ◽

Residence Time ◽

Vertical Wall ◽

High Amplitude ◽

Boundary Integral ◽

Boundary Integral Method ◽

Wave Crest ◽

Asymptotic Formulae ◽

Cine Film ◽

Run Up

The collision of a solitary wave, travelling over a horizontal bed, with a vertical wall is investigated using a boundary-integral method to compute the potential fluid flow described by the Euler equations. We concentrate on reporting new results for that part of the motion when the wave is near the wall. The wall residence time, i.e. the time the wave crest remains attached to the wall, is introduced. It is shown that the wall residence time provides an unambiguous characterization of the phase shift incurred during reflection for waves of both small and large amplitude. Numerically computed attachment and detachment times and amplitudes are compared with asymptotic formulae developed using the perturbation results of Su & Mirie (1980). Other features of the flow, including the maximum run-up and the instantaneous wall force, are also presented. The numerically determined residence times are in good agreement with measurements taken from a cine film of solitary wave reflection experiments conducted by Maxworthy (1976).

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Visual Interpretation Compared with Caliper and Computerized Measurements in Experimental Vessel Stenosis

Acta Radiologica ◽

10.1177/028418519203300608 ◽

1992 ◽

Vol 33 (6) ◽

pp. 542-545 ◽

Cited By ~ 3

Author(s):

Y. Yanagihara ◽

T. Sugahara ◽

Y. Fukunishi

Keyword(s):

Visual Interpretation ◽

Common Cause ◽

Optical Illusions ◽

Caliper Measurement ◽

Interpretation Errors ◽

Vessel Stenosis ◽

Actual Degree ◽

Cause Of Error ◽

Cine Film ◽

Experimental Vessel

To explain visual interpretation errors on angiograms, visual interpretation, caliper measurement, and computerized measurement of cine film were compared using each of 10 graphic models and 10 acrylic models with “stenotic vessels”. Stenosis > 40% was overestimated and stenosis < 40% underestimated by visual interpretation. In caliper measurement, stenosis > 40% at exposure of 90 kV was greatly overestimated by a degree similar to the estimation by visual interpretation, and stenosis > 40% at exposures of 74 kV and 58 kV was slightly overestimated. In computerized measurement, the estimation was consistent with the actual degree of stenosis. Therefore, visual interpretation was not reliable for estimation, and computerized measurement was indispensable for estimation of vessel stenosis. Moreover, we consider the most common cause of error in visual interpretation to be optical illusions.

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Diffraction-Limited Observations Of Binary Star Systems

International Astronomical Union Colloquium ◽

10.1017/s025292110011886x ◽

1979 ◽

Vol 50 ◽

pp. 27-1-27-10 ◽

Cited By ~ 1

Author(s):

R.J. Scaddan ◽

B.L. Morgan ◽

J.C. Dainty

Keyword(s):

Real Time ◽

White Light ◽

Binary Star ◽

Chromatic Dispersion ◽

Image Intensifier ◽

Television Camera ◽

Speckle Patterns ◽

Cine Film ◽

Magnitude Difference ◽

Made In

AbstractA speckle interferometer is described which has been used to measure the separations and position angles of binary star systems. The present instrument uses an image intensifier to enable the enlarged stellar images to be recorded on cine-film. The exposure time is typically 8 msec and the camera can be operated at up to 20 frames per second. The instrument incorporates a means of calibrating the magnitude difference of the binary star systems.A pair of achromatising lenses have been designed which will correct the radial chromatic dispersion in the speckle patterns and allow exposures to be made in “white” light. A system is under development which uses an image intensifier and a plumbicon television camera to acquire the data and a hard-wired autocorrelator to perform the analysis in real time. With this system the limiting magnitude of the technique should be significantly improved.

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Patterns of Inheritance in the Bowing Display and Associated Behaviour of Some Hybrid Streptopelia Doves

Behaviour ◽

10.1163/156853970x00303 ◽

1970 ◽

Vol 36 (3) ◽

pp. 187-214 ◽

Cited By ~ 20

Author(s):

S.J.J.F. Davies

Keyword(s):

The Other ◽

F1 Hybrids ◽

Characteristic Form ◽

Pure Species ◽

F1 Hybrid ◽

Cine Film ◽

F2 Generation ◽

Species Hybrids ◽

Relative Variability

AbstractThe bowing display of Streptopelia doves was studied in captive individuals of five species at Madingley, Cambridge, England from 1961 to 1964. The five species were S. roseogrisea-(risoria) (barbary), S. decaocto (collared), S. turtur (turtle), S. chinensis (necklace) and S. senegalensis (senegal). F1 hybrids were bred between the barbary and the other four species and single males of each of the F1 necklace x collared and senegal x turtle were also observed. F2 generation birds of the collared x barbary F1 hybrid, as well as some backcrossed birds were included in the study. Bowing displays were usually given only by male doves when close to another dove. The form of the bowing display differed from species to species and exhibited a typical intensity in each species. Each hybrid also had a bowing display of characteristic form. The ciné film showed that there was variation in form between the bowing cycles of any one bout, both in the pure species and in the hybrids. This variation could not be adequately described from the films taken in this study. The rate of bowing of each species was constant and differed from that of every other species. Hybrids also exhibited a typical intensity in this character. There was much more intra-specific and intra-hybrid variaton in the timing of individual movements within bowing cycles in a bout than in the timing of the bowing cycle as a whole. The relative variability of the different elements could be ranked, and in all species and hybrids studied the timing of the total cycle tended to be least variable and that of the pause at the top of the bow most variable. The frequencies with which bowing displays and kah calls were given under standard conditions, were measured, and provided two other behavioural characters whose pattern of inheritance could be studied. Three patterns of inheritance were found in each of these behaviour patterns of the F1 hybrids. In some cases the behaviour was intermediate between that of the two parents, in others it approximated the behaviour of one parent closely and in others again the hybrid's behaviour exceeded the range of either parent.

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