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Numerical simulations of convection in crystal-bearing magmas: A case study of the magmatic system at Erebus, Antarctica

Indira Molina, Alain Burgisser, Clive Oppenheimer
2012 Journal of Geophysical Research  
Citation: Molina, I., A. Burgisser, and C. Oppenheimer (2012), Numerical simulations of convection in crystal-bearing magmas: A case study of the magmatic system at Erebus, Antarctica,  ...  Following validity and verification tests of the model, we carried out four single-phase and three bi-phase numerical 30-year-simulations, in an idealized 2D geometry representing a lava lake cooled from  ...  This work represents part of the first author's thesis. We thank G. Brandeis and C. Jaupart for their comments on the way they conducted their experimental work and J. Andújar and M.  ... 
doi:10.1029/2011jb008760 fatcat:wg57o2x4snh4rki53rhncxxva4

Comparison of centric and reverse-centric trajectories for highly accelerated three-dimensional saturation recovery cardiac perfusion imaging

Haonan Wang, Neal K. Bangerter, Daniel J. Park, Ganesh Adluru, Eugene G. Kholmovski, Jian Xu, Edward DiBella
2014 Magnetic Resonance in Medicine  
This study compares centric and reverse-centric 3D cardiac perfusion imaging.  ...  Methods-An undersampled (98 phase encodes) 3D ECG-gated saturation-recovery sequence that alternates centric and reverse-centric acquisitions each time frame was used to image phantoms and in vivo subjects  ...  However, 3D perfusion imaging requires more phase encodes and hence a much longer readout than the 2D case.  ... 
doi:10.1002/mrm.25478 pmid:25285855 pmcid:PMC4456305 fatcat:zerovoiwzfarvgo3orjnf3bf34

Synergy between 3DMM and 3D Landmarks for Accurate 3D Facial Geometry [article]

Cho-Ying Wu, Qiangeng Xu, Ulrich Neumann
2021 arXiv   pre-print
This work studies learning from a synergy process of 3D Morphable Models (3DMM) and 3D facial landmarks to predict complete 3D facial geometry, including 3D alignment, face orientation, and 3D face modeling  ...  We next reverse the representation direction and show that predicting 3DMM parameters from sparse 3D landmarks improves the information flow.  ...  Acknowledgement We sincerely thank Jingjing Zheng, Jim Thomas, and Cheng-Hao Kuo for their detailed feedback on this paper.  ... 
arXiv:2110.09772v2 fatcat:4teppdxktvffxf3vj5cw4bjnqq

Experimental and computational studies of the aerodynamic performance of a flapping and passively rotating insect wing

Yufeng Chen, Nick Gravish, Alexis Lussier Desbiens, Ronit Malka, Robert J. Wood
2016 Journal of Fluid Mechanics  
In experiments we measure the time varying kinematics, lift force and two-dimensional velocity fields of the induced flow from particle image velocimetry.  ...  We show that the wing kinematics and flapping efficiency depend on the stiffness of a passive compliant hinge.  ...  Any opinions, findings and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the National Science Foundation.  ... 
doi:10.1017/jfm.2016.35 fatcat:wmahvjlryzakle4u7rhsxgqiii

Fast 3D target-oriented reverse-time datuming

Shuqian Dong, Yi Luo, Xiang Xiao, Sergio Chávez-Pérez, Gerard T. Schuster
2009 Geophysics  
Target-oriented RTD is tested on 2D and 3D SEG/EAGE synthetic data sets and a 3D field data set from the Gulf of Mexico.  ...  Imaging of subsalt sediments is a challenge for traditional migration methods such as Kirchhoff and one-way waveequation migration.  ...  NUMERICAL TEST To demonstrate the effectiveness of the target-oriented RTD method, we implement this algorithm on 2D and 3D SEG/EAGE synthetic data and a 3D field data set from the Gulf of Mexico.  ... 
doi:10.1190/1.3261746 fatcat:4jqcch3zfbb6lmjyqkkni7sxni

On the Origin of Radial Magnetic Fields in Young Supernova Remnants

Byung‐Il Jun, Michael L. Norman
1996 Astrophysical Journal  
We study the radio emission from young supernova remnants by means of 3D numerical MHD simulations of the Rayleigh-Taylor instability in the shell of the remnant.  ...  Stokes parameters (I,Q, and U) are computed to study the radio properties of the remnant. The total intensity map shows two distinctive regions (inner and outer shells).  ...  To study the evolution of both fluid and magnetic fields in the mixing layer, the time history of the turbulent kinetic and magnetic energy densities is shown in Figure 4 for both 2D and 3D simulations  ... 
doi:10.1086/178059 fatcat:fearoe6e3rbfro3ru5pynkrgv4

A fast marching method based back projection algorithm for photoacoustic tomography in heterogeneous media [article]

Tianren Wang, Yun Jing
2015 arXiv   pre-print
Transcranial imaging is used here as a case study.  ...  This paper presents a numerical study on a fast marching method based back projection reconstruction algorithm for photoacoustic tomography in heterogeneous media.  ...  This means that time reversal reconstruction for PAT is not exact in 2D. However, 3D simulations are extremely time-and memory-consuming and therefore were not investigated.  ... 
arXiv:1501.03869v2 fatcat:pubcvo44engplom3fhb5pqmlge

Interaction Dynamics of Singular Wave Fronts [article]

Darryl D. Holm, Martin F. Staley
2013 arXiv   pre-print
A suite of 2d and 3d numerical simulations provide collision rules for the wavefront reconnection phenomenon in a variety of scenarios.  ...  We generalize the singular solutions of EPDiff for other applications, in computational anatomy and in imaging science, where the singular wavefronts are evolving image outlines, whose momentum may be  ...  Acknowledgements We are grateful to many friends and colleagues for their enormous help and encouragement during the course of this work. These include R. Lowrie and B. A.  ... 
arXiv:1301.1460v1 fatcat:56n65lom3bacncs2oksw5wnkuu

A Comparison of Two-Dimensional and Three-Dimensional Micromechanical Discrete Element Modeling of the Splitting Tests for Asphalt Mixtures

Yong Peng, Jian-xi Bao, Zhen Wang
2017 DEStech Transactions on Engineering and Technology Research  
Based on imaging and discrete element method (DEM), this study aims to compare two-dimensional (2D) and three-dimensional (3D) micromechanical modeling of the splitting tests for asphalt mixtures.  ...  The 2D and 3D microstructure-based discrete element models of a splitting test were established by a discrete element program called Particle Flow Code in Two/Three Dimensions (PFC2D/3D).  ...  ACKNOWLEDGEMENTS The authors would like to thank the Zhejiang Provincial Natural Science Foundation of China (LY15E080006) and China Scholarship Council for their financial support of this research.  ... 
doi:10.12783/dtetr/ictim2016/5473 fatcat:5m3sqghqp5gvpne6exxyod4gqe

A simple Fourier transform-based reconstruction formula for photoacoustic computed tomography with a circular or spherical measurement geometry

Kun Wang, Mark A Anastasio
2012 Physics in Medicine and Biology  
It also yields a straightforward numerical implementation that is robust and two orders of magnitude more computationally efficient than filtered backprojection algorithms.  ...  Photoacoustic computed tomography (PACT), also known as optoacoustic tomography, is an emerging imaging modality that has great potential for a wide range of biomedical imaging applications.  ...  Acknowledgments This work was supported in part by NIH awards EB010049 and CA167446.  ... 
doi:10.1088/0031-9155/57/23/n493 pmid:23165199 pmcid:PMC3542417 fatcat:2v6ucqrmjzbe7ptvwls3q65qym

Single optical surface imaging designs with unconstrained object to image mapping with non-rotational symmetry

Jiayao Liu, Juan C. Miñano, Pablo Benítez, Frank Wyrowski, John T. Sheridan, Jani Tervo, Youri Meuret
2014 Optical Modelling and Design III  
In the first introductory part, 2D designs and 3D designs by rotation using the differential equation method for the limit case of small pupil have been reviewed.  ...  The result of this extended method has been proved to coincide with the former 3D design by rotation which is a special case of 3D freeform design.  ...  design and anastigmatic design Figure 7 . 7 Comparison between 3D rotational anastigmatic design and the numerical solution Figure 8 . 8 3D anastigmatic design with very curved image surface (a) and  ... 
doi:10.1117/12.2051939 fatcat:cr5yxqtbzffgdekvo3sqibq4eu

Perception driven 3D facial expression analysis based on reverse correlation and normal component

Xing Zhang, Zheng Zhang, Lijun Yin, Daniel Hipp, Peter Gerhardstein
2015 2015 International Conference on Affective Computing and Intelligent Interaction (ACII)  
In this paper, we propose to study the facial expressive regions using a reverse correlation method, and further develop a novel 3D local normal component feature representation based on human perceptions  ...  This approach achieves a good performance and has been validated by testing on both highresolution database and real-time low resolution depth map videos.  ...  ACKNOWLEDGMENT This material is based upon the work supported in part by the NSF under grant CNS-1205664, SUNY IITG, and SUNY Health Network of Excellence (SUNY RF).  ... 
doi:10.1109/acii.2015.7344633 dblp:conf/acii/ZhangZYHG15 fatcat:be4vc3pvgneztl3cweqo7yfqc4

An experimental testbed for the study of hydrodynamic issues in supernovae

H. F. Robey, J. O. Kane, B. A. Remington, R. P. Drake, O. A. Hurricane, H. Louis, R. J. Wallace, J. Knauer, P. Keiter, D. Arnett, D. D. Ryutov
2001 Physics of Plasmas  
More than a decade after the explosion of supernova 1987A, unresolved discrepancies still remain in attempts to numerically simulate the mixing processes initiated by the passage of a very strong shock  ...  To resolve such discrepancies between observation and simulation, an experimental testbed has been designed on the Omega Laser for the study of hydrodynamic issues of importance to supernovae ͑SNe͒.  ...  I Experiment parameters for the 2D vs 3D comparison.  ... 
doi:10.1063/1.1352594 fatcat:5f2cfhsw7fcd3ey7jjmlooahne

Numerical Investigation of Supersonic Oscillatory Flow with Strong Interference over a Capsule-shaped Abort System

Yunpeng WANG, Hiroshi OZAWA, Yoshiaki NAKAMURA
2012 Transactions of the Japan Society for Aeronautical and Space Sciences  
This flow oscillation is considered to be a potentially high risk in separation of the capsule and rocket. Therefore, the present study focuses on the unsteady case of model B.  ...  Time-averaged results are employed to see the whole trajectories of shock waves and the variation in amplitude of flow oscillation during one cycle.  ...  Acknowledgments The experiments in this research were carried out using the supersonic wind tunnel at the Institute of Space and Astronautical Science (ISAS/JAXA).  ... 
doi:10.2322/tjsass.55.286 fatcat:fwmwwhtyrvgm5m3renhnccq2he

Designing unit cell in three-dimensional periodic nanostructures using colloidal lithography

Joong-Hee Min, Xu A. Zhang, Chih-Hao Chang
2015 Optics Express  
Colloidal phase-shift lithography, the illumination of a twodimensional (2D) ordered array of self-assembled colloidal nanospheres, is an effective method for the fabrication of periodic three-dimensional  ...  Using analytical and finitedifference time-domain (FDTD) modeling, we examine the effect of the wavelength-diameter ratio on intensity pattern, lattice constants, and unitcell geometry.  ...  This work was supported by a NASA Office of the Chief Technologist's Space Technology Research Opportunity -Early Career Faculty grant (grant NNX12AQ46G).  ... 
doi:10.1364/oe.24.00a276 pmid:26832581 fatcat:4sbnb3e63fcoteoyxuvoi362xy
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