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Inferring 3D structure from image motion: The constraint of Poinsot motion

Bruce M. Bennett, Donald D. Hoffman, Jin S. Kim, Scott N. Richman
1993 Journal of Mathematical Imaging and Vision  
We propose a formal theory for this ability based on the constraint of Poinsot motion, i.e., rigid motion with constant angular momentum.  ...  No theory of structure from motion currently available can account for this ability.  ...  We also thank three anonymous reviewers for careful and insightful comments that greatly improved the paper.  ... 
doi:10.1007/bf01250527 fatcat:idegs2pv25fxhpenxtng75f2p4

Designer nanoscale DNA assemblies programmed from the top down

R. Veneziano, S. Ratanalert, K. Zhang, F. Zhang, H. Yan, W. Chiu, M. Bathe
2016 Science  
The asymmetric polymerase chain reaction was applied to produce stable, monodisperse assemblies with custom scaffold length and sequence that are verified structurally in 3D to be high fidelity using singleparticle  ...  However, the approach is limited by the need to forward-design specific Watson-Crick basepairing manually for any given target structure.  ...  Single-particle image processing and 3D reconstruction Particle images recorded on DE-20 detector were motion corrected and radiation damage compensated (24) .  ... 
doi:10.1126/science.aaf4388 pmid:27229143 pmcid:PMC5111087 fatcat:dw4cccnmtfhxfo3hiek46nfuca

Computational aeroacoustics: progress on nonlinear problems of sound generation

Tim Colonius, Sanjiva K. Lele
2004 Progress in Aerospace Sciences  
These aeroacoustic problems may be classified based on the physical processes responsible for the sound radiation, and range from linear problems of radiation, refraction, and scattering in known base  ...  We stress the importance of the resolving power of the discretization as well as computational efficiency of the overall scheme.  ...  Acknowledgements We wish to thank the Editor for his kind invitation to write this article.  ... 
doi:10.1016/j.paerosci.2004.09.001 fatcat:tlaa6amyafasdbb4ykwihhxjsa

Carriages, coffee-cups and dynamometers :representing French technical cultures in the London Mechanics' Magazine,1823-1848

Ben Marsden
2010 Documents pour l'histoire des techniques  
Acknowledgements Thanks to the organizers of the conference, and in particular  ...  afford 3d.  ...  ) privilege can be inferred from its 1790s' depiction of Louis XVI as 'un cochon' in his pigsty. 30 Those French exhibitions, it seemed, pandered to the extravagant consumption of the aristocracy with  ... 
doi:10.4000/dht.1486 fatcat:minwtkxvubhlzdxxsazxpora6y

Geometry, Kinematics, and Rigid Body Mechanics in Cayley-Klein Geometries [article]

Charles Gunn, Technische Universität Berlin, Technische Universität Berlin, Ulrich Pinkall
Isometric motions are defined. Taking derivatives of such motions in different coordinate systems leads to the Lie bracket, as the commutator product in the algebra.  ...  It develops the necessary theory -- from projective geometry, exterior algebra, and quadratic forms -- required to describe a class of Cayley-Klein spaces including the three classical spaces of constant  ...  top when one removes the constraint that the motion has a fixed point.  ... 
doi:10.14279/depositonce-3058 fatcat:w6lyzmw6zvc5hja3okryh5gete

The bending effect in turbulent flame propagation

Girish Venkata Nivarti, Apollo-University Of Cambridge Repository, Apollo-University Of Cambridge Repository, Robert Stewart Cant
Therefore, this thesis presents turbulent flame propagation and the bending effect as emergent from the dynamics of a flame surface that retains its internal thermo-chemical structure.  ...  In the present thesis, the sensitivity of flame propagation to the turbulent motion of burning gases is investigated.  ...  Acknowledgements I value all the love I have received these four years in a land so far from home.  ... 
doi:10.17863/cam.17198 fatcat:xoqexy4isrcxzfjmriqkuzlycq

New visualization techniques for engineering simulations [article]

Timo Reinhold Oster, Universitäts- Und Landesbibliothek Sachsen-Anhalt, Martin-Luther Universität, Holger Theisel, Dominique Thévenin
A focus of interest in the analysis of such simulations is the flame surface, where most of the chemical reactions take place.  ...  The computational power of supercomputers is increasing much faster than the performance of storage infrastructures.  ...  Together, they form a sort of skeleton of the vector field, from which the behavior of the full field can be inferred.  ... 
doi:10.25673/33913 fatcat:6nt2zzlw6nb5hh7jzs4atylcm4

Main Belt Asteroid Histories: Simulations of erosion, cratering, catastrophic dispersions, spins, binaries and tumblers [article]

Keith. A. Holsapple
2022 arXiv   pre-print
This is a study of the history of the asteroids in the main asteroid belt. Collisions have been the dominant process.  ...  The results lead to new paradigms for asteroid histories including the distribution of spins; the irrelevance of strength spin limits; the "unusual" spins of 2001 OE84; and of large slow-spinning tumbling  ...  from far-encounter images and conjecture that some of the observed large "facets" might be craters.  ... 
arXiv:2012.15300v4 fatcat:j2zzsd6snretdcdnsrqk3xwgwa

Characterization of advected-surfaces. The sinews of a "MultiSECtioning" approach for non-premixed combustion

Giancarlo Sorrentino
The first step (and the "sinews" of the approach) considers the stirring of material surfaces in transitional/turbulent flows. An experimental setup has been developed to study this.  ...  The optical diagnostics and the data processing procedure are clearly described. The limitations of the measur [...]  ...  The images reported in the figure are only examples and are useful to give an impression of the great variety of structures, which can be established in 3D flows.  ... 
doi:10.6092/unina/fedoa/9488 fatcat:5pqpy3q7trhbnonri2jlkavzv4

Ho_columbia_0054D_12272.pdf [article]

Using EM, Jim Lake was able to describe extensively the main topology of the ribosome and produce a 3D model of the macromolecular complex by inference from a few views (Lake, 1976) .  ...  The use of particle images originating from heterogeneous structures for a single reconstruction results in a 3D density map that is a blend multiple underlying structures.  ... 
doi:10.7916/d81v5nb6 fatcat:4pveyeiswjhobgbex276retvsy


Mécanique, M Franck, Plouraboue Olivier, Praud Rapporteurs, Anke Mme, Espci Lindner, M Paris, Hermes Gadelha, M Praud, Inp Toulouse, Membre Degond
We report the first observation of universal enstrophy cascade in concentrated swarming sperm consistent with a body of evidence built from various independent measurements.  ...  Collective motion of self-sustained swarming flows has recently provided examples of small-scale turbulence arising where viscous effects are dominant.  ...  ACKNOWLEDGMENTS This work has been supported by the French Agence Nationale pour la Recherche (ANR) in the frame of contract MOTIMO (ANR-11-MONU-009-01).  ... 

Présentée et soutenue par : Membre(s) du jury

M Lapeyre, M Thierry, Poinsot Franck, Nicoud Rapporteurs, M Sébastien Ducruix, Centrale Paris, M Scalo
2015 unpublished
In a first part, the context for chemistry, motion and acoustics of reacting multi-species flow is given.  ...  Computational domains can be increased, and have gone from including only the reacting zone, to adding the fuel-air mixing areas, the heat liners and secondary flows, and the upstream and downstream elements  ...  Ducts are generally 3D structures with contractions and widening portions, matching flow dilatation or compression.  ... 

Présentée et soutenue par : Rapporteurs : Membre(s) du jury

Anne Mme, Felden, Mme Benedicte, Cuenot Mme, Eleonore Riber, Pascale Mme, Coria Domingo, Ecole Darabiha, D Centrale, Paris, M Grisch, Président Coria (+1 others)
2017 unpublished
This work can be seen therefore as the foundation of a new stage in LES of turbulent combustion, in which the impact of chemistry can be taken into account, without prior modeling assumptions, to predict  ...  And the first lesson of all was the basic trust that he could learn. It is shocking to find how many people do not believe they can learn, and how many more believe learning to be difficult."  ...  From Fig. 8.19 (b) and the analysis of the images of Fig. 8.16 , the points are identified as being part of the back diffusion flame front (1), and responsible for the wrinkled structures on the stoichiometric  ... 

Computed Tomography of Chemiluminescence: A 3D Time Resolved Sensor for Turbulent Combustion

Jeremy Floyd, Peter Lindstedt, Andreas Kempf, EPSRC DTA Award.
CTC provides the instantaneous 3D flame structure, and can also measure: excited species concentrations, equivalence ratio, heat release rate, and possibly strain rate.  ...  High resolutions require simultaneous measurements from many view points, and the cost of multiple sensors has traditionally limited spatial resolutions.  ...  Conclusions A review of the literature has shown that time resolved 3D turbulent flame structural information can be obtained from a sensor based on Computed Tomography of 2D Chemiluminescence images.  ... 
doi:10.25560/5477 fatcat:pikz3ro4a5h5jd3lv7lua56sy4

Investigation on spatial and temporal characteristics of scalar dissipation rate in non-reacting and reacting turbulent jets [article]

Vlad Aparece-Scutariu, University Of Edinburgh, Brian Peterson, Ignazio Maria Viola
Near-field mixing up to 10 diameters from the nozzle is described by temporally and spatially-coherent layers of high SDR values.  ...  Axial component of SDR is not aligned to any direction, but rather shows irregular structures.  ...  Acknowledgement This thesis is the reflection of the people that guided me in finding my 'Road not taken'.  ... 
doi:10.7488/era/1204 fatcat:z4cwqwlehbgqdiqqj5mexwipna
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