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Rigorous bounds for two-frame structure from motion [chapter]

J. Oliensis
1996 Lecture Notes in Computer Science  
We present an analysis of the problem of recovering motion, particularly rotation, from two image frames. We derive an exact bound on the magnitude of the error in recovering the rotation.  ...  These results form part of our correctness proof for a recently developed algorithm for recovering structure and motion from a multiple{image sequence.  ...  Introduction We have demonstrated in 7, 6] a new algorithm for structure from motion (SFM) which, in the appropriate domain, provably reconstructs structure and motion correctly.  ... 
doi:10.1007/3-540-61123-1_138 fatcat:rxbdbpbdn5hato4eoxa4vu7r54

Transitory image sequences, asymptotic properties, and estimation of motion and structure

J. Weng, Yuntao Cui, N. Ahuja
1997 IEEE Transactions on Pattern Analysis and Machine Intelligence  
This article deals with some major theoretical and algorithmic issues associated with the task of estimating structure and motion from transitory image sequences.  ...  Based on these results, we introduce an efficient "cross-frame" estimation technique for the CC representation.  ...  The cross-frame motion set completely defines the motion between any two frames within the batch. When K = 0, we have just an interframe motion in W(p).  ... 
doi:10.1109/34.589205 fatcat:7zwwl7x7hbhedjz5nsigu2znyq

Dynamite: a simple way to gain insight into protein motions

C. Paul Barrett, Benjamin A. Hall, Martin E. M. Noble
2004 Acta Crystallographica Section D: Biological Crystallography  
We also thank the group of Mark Sansom, especially Oliver Beckstein and Kaihsu Tai, for helpful discussions about simulation techniques.  ...  CPB is supported by the BBSRC through a grant to the Oxford Centre for Molecular Sciences, which has also funded the computational facility that will host Dynamite calculations.  ...  For example, Fig. 5 shows frames from a movie that was prepared by hand from the two PDB-format trajectories superimposed and aligned frame by frame.  ... 
doi:10.1107/s0907444904019171 pmid:15572782 fatcat:s5xhwewbc5d5ffrhju7opqrjhi

Structure and Dynamics of the Force-Generating Domain of Myosin Probed by Multifrequency Electron Paramagnetic Resonance

Yuri E. Nesmelov, Roman V. Agafonov, Adam R. Burr, Ralph T. Weber, David D. Thomas
2008 Biophysical Journal  
One state is indistinguishable from that of the ADP-bound state (M*) and is characterized by moderate restriction and slow motion, with a mole fraction of 16%.  ...  The ADP-bound biochemical state of myosin also reveals a single structural state (M*, shown previously to be the same as the post-powerstroke ATP-bound state), with less restricted slow motion of the spin  ...  , which accounts for two motions: restricted local motion of the spin label and unrestricted tumbling of myosin in solution.  ... 
doi:10.1529/biophysj.107.124305 pmid:18339764 pmcid:PMC2426653 fatcat:apjemgdlbfg5bhurxqeugwmavu

Rocking-isolated frame structures: Margins of safety against toppling collapse and simplified design approach

F. Gelagoti, R. Kourkoulis, I. Anastasopoulos, G. Gazetas
2012 Soil Dynamics and Earthquake Engineering  
The validity and limitations of such approximation are investigated for a rigid-block on rigid-base, utilizing rigorous analytical solutions from the bibliography; and for the frame structure on nonlinear  ...  This paper aims to explore the limitations associated with the design of "rocking-isolated" frame structures.  ...  Acknowledgement The financial support for this paper has been provided under the research project ''DARE'', which is funded through the European Research Council's (ERC) ''IDEAS'' Program, in Support of  ... 
doi:10.1016/j.soildyn.2011.08.008 fatcat:wrzhne2uuvetleedultoeufwgm

Visualizing myosin's power stroke in muscle contraction

M C Reedy
2000 Journal of Cell Science  
Rebuilding the atomic model of nucleotide-free subfragment 1 (S1) to fit fast-frozen, active IFM crossbridges suggests a two-stage power stroke in which the catalytic domain rolls on actin from weak to  ...  The long-standing swinging crossbridge or lever arm hypothesis for the motor action of myosin heads finds support in recent results from 3-D tomograms of insect flight muscle (IFM) fast frozen during active  ...  Reedy Freeze-frames of myosin's power stroke Fig. 5 . A hypothetical two-stage power stroke is constructed from a sequence of rebuilt S1s from tomograms of actively contracting IFM.  ... 
pmid:11017871 fatcat:jyb4qg5tiba23luy6d2am4jbje

Mechanical Coupling in Myosin V: A Simulation Study

Victor Ovchinnikov, Bernhardt L. Trout, Martin Karplus
2010 Journal of Molecular Biology  
rigor conformation, which has a closed actin-binding cleft, to the post-rigor conformation, in which the cleft is open.  ...  The 'minimal' FS that results in extensive structural changes in the overall myosin conformation is comprised of the ATP, Switch 1, and the nearby HF, HG and HH helices.  ...  MK and VO thank Anne Houdusse for discussions concerning myosin V. The authors acknowledge partial financial support by a grant from the Human Frontiers Grant Science Program.  ... 
doi:10.1016/j.jmb.2009.10.029 pmid:19853615 pmcid:PMC2813401 fatcat:bs3rgyo5xzecnc62ymz5yeh7wi

The Conformation of Myosin Head Domains in Rigor Muscle Determined by X-Ray Interference

M. Reconditi, N. Koubassova, M. Linari, I. Dobbie, T. Narayanan, O. Diat, G. Piazzesi, V. Lombardi, M. Irving
2003 Biophysical Journal  
We used x-ray interference between the two head arrays in opposite halves of each myosin filament to determine the rigor head conformation in single fibers from frog skeletal muscle.  ...  During isometric contraction (force T 0 ), the interference effect splits the M3 x-ray reflection from the axial repeat of the heads into two peaks with relative intensity (higher angle/lower angle peak  ...  The authors thank the noncrystalline diffraction team at CCLRC Daresbury Laboratory for x-ray diffraction facilities, and A. Aiazzi, M. Dolfi, and J. Gorini for mechanical and electronics support.  ... 
doi:10.1016/s0006-3495(03)74547-0 pmid:12885655 pmcid:PMC1303229 fatcat:m7nwpy4fpnbvtgoqp44u57hzae

On the importance of source classification in Wyner-Ziv video coding

Xin Li, William A. Pearlman, John W. Woods, Ligang Lu
2008 Visual Communications and Image Processing 2008  
Specifically, the subsource with the steepest R-D slope is identified to be the class of signif icant wavelet coefficients of the blocks that are poorly motion-compensated in WZ frames.  ...  encouraging performance for the test sequences used in our experiments.  ...  Zixiang Xiong at Texas A&M University for providing him a copy of the implementation of LDPC-based DSC algorithm. 14  ... 
doi:10.1117/12.766763 fatcat:p375tu2yyrhhtec3yb3775rypu

Ground-Motion Suite Selection for Eastern North America

E. M. Hines, L. G. Baise, S. S. Swift
2011 Journal of Structural Engineering  
Ground-motion suite selection for Eastern North America (ENA) is distinguished from suite selection for high seismic regions by uncertainty related to earthquake intensity, spectral shape, and the wide  ...  the development of ground-motion suites capable of exciting the widest range of structural periods while accounting for uncertainty related to ground-motion intensity.  ...  While we were not able to derive rigorously bounds of 0.5 and 2.0, we favored these numbers for their simplicity and for their consistency between UHS points.  ... 
doi:10.1061/(asce)st.1943-541x.0000258 fatcat:vrkxdussffhfzetdzqm7ej3r2e

Page 280 of Mathematical Reviews Vol. , Issue 85a [page]

1985 Mathematical Reviews  
Numerical methods for computing optimal bounds on deformation are given and illustrated by means of a simple frame structure. We demon- strate that the computed optimal bounds are fairly accurate.”  ...  Author’s summary: “A solution is found for the first boundary value problem of two-dimensional steady-state elasticity theory for a quadrant and conditions are found which allow a rigorous mathematical  ... 

Allosteric Modulation of Cardiac Myosin Dynamics by Omecamtiv Mecarbil

Shaima Hashem, Matteo Tiberti, Arianna Fornili
2018 Biophysical Journal  
We present here a Molecular Dynamics study of the motor domain of human cardiac myosin bound to OM, where the effects of the drug on the dynamical properties of the protein are investigated for the first  ...  We found that OM has a double effect on myosin dynamics, inducing a) an increased coupling of the motions of the converter and lever arm subdomains to the rest of the protein and b) a rewiring of the network  ...  OM for at least 50% frames, S3 Table).  ... 
doi:10.1016/j.bpj.2017.11.251 fatcat:kej6khumfrgrroarzfuvrc77ve

Effects of ATP and Actin-Filament Binding on the Dynamics of the Myosin II S1 Domain

Joseph L. Baker, Gregory A. Voth
2013 Biophysical Journal  
We also study actin-free myosin in both rigor and post-rigor conformations.  ...  Central to understanding the processive motion of myosin on actin is the characterization of the individual states along the mechanochemical cycle.  ...  Marissa Saunders, Jun Fan, Daniel Parton, and Martin McCullagh for helpful discussions related to this work.  ... 
doi:10.1016/j.bpj.2013.08.023 pmid:24094403 pmcid:PMC3791303 fatcat:3xoj5pdqpzfj7gi3h23wnem57a

Configuration space visualization

Dror Atariah, Günter Rote
2012 Proceedings of the 2012 symposuim on Computational Geometry - SoCG '12  
Fundamental Motions. We first present a workspace free from obstacles, and we investigate some basic motions of the robot: pure translation, pure rotation and a simple combination of the two.  ...  In order to keep the scenes as clear and understandable as possible, the configuration space, in all but two scenes, is bounded to a gridded bounding box.  ... 
doi:10.1145/2261250.2261313 dblp:conf/compgeom/AtariahR12 fatcat:t34joi26abfqjd2awdz4srtnpu

Cryo-EM structures reveal specialization at the myosin VI-actin interface and a mechanism of force sensitivity

Pinar S Gurel, Laura Y Kim, Paul V Ruijgrok, Tosan Omabegho, Zev Bryant, Gregory M Alushin
2017 eLife  
Additionally, analysis of the transition from ADP to rigor provides a structural rationale for force sensitivity in this step of the mechanochemical cycle.  ...  Here we present cryo-EM structures of the unique minus-end directed myosin VI motor domain in rigor (4.6 Å) and Mg-ADP (5.5 Å) states bound to F-actin.  ...  Acknowledgements We gratefully acknowledge Jenny Hinshaw (NIDDK) for sharing equipment and microscope usage. We also thank Jim Sellers and Harry Takagi (NHLBI) for thoughtful comments and discussion.  ... 
doi:10.7554/elife.31125 pmid:29199952 pmcid:PMC5762158 fatcat:fvehnik3q5b55k2yydgdwm57ry
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